unison research sh

• Unico Series
• Loudspeakers
• Distribution

Unison Research’s unrivalled ability with Single-Ended valve designs is well known around the world. The SH is the company’s first headphone amplifier to benefit from such extensive knowledge and ability. The SH uses a Single-Ended Class A design with only two stages and a passive volume control. The classic refinement of the valves combines with modern technology found in the internal USB DAC to produce something truly stunning.

USB DAC SPECIFICATION Asynchronous USB interface compliant to USB 2.0 Audio Class Accepts PCM up to 384kHz and DSD up to 128x Resolution up to 32 bits Last generation ESS Sabre DAC with jitter eliminator circuit Galvanic isolation between USB interface and conversion circuit Low phase noise clocks which reside in the “clean” supply domain to preserve low jitter performance 110dB SNR (@ 1kHz, “A” weighted, 192kHZ) 0.008% THD+N (@ 1kHz, -3dBFS)

Tech spechs

• Maximum output voltage (THD 1%) : output “High sensibility” 0.5 V/150 ohm, 0.45 V/33 ohm, 0.4 V/10 ohm output “Low sensibility” 1.5 V/150 ohm, 1.2 V/33 ohm, 0.65 V/10 ohm
• Frequency Response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz (output “Low sensibility”, 33 ohm load)
• Input impedance: 20 kohm // 100 pF
• Sensibility: 0.67 V in/ 0.33 V out (output “High sensibility”, 10 ohm load) 0.67 V in / 1 V out (output “Low sensibility”,33 ohm load)
• Input stage: Pure Class A, ECC83/12AX7
• Output stage: Class A, 2 EL84 triode connected
• Inputs: 1 line RCA, 1 USB
• Outputs : 2 (parallel connected)
• Feedback factor: 16 dB
• THD: < 0.2% @ 1kHz, 0.5V, <0.8% up to 1 V (output “Low sens.”, 33 ohm load)
• Absorption: 45 W
• Dimension: 22,5 cm x 12,6 cm x 32,2 cm
• Weight: 6 kg
• SH manual ita_eng
• XMOS-Stereo-USB-Audio-Class2-Driver-302D_v3.34.0.zip
• Unison USB DAC-2
• XMOS-Stereo-USB-Audio-Class2-Driver-302D_v4.13.0.exe_.zip

Copyright © 2024 A.R.I.A. Advanced Research in Audio VAT Number: 02741420240. Privacy and Cookie policy .

Unison Research choose Bludelego

Commercial requests

Click below to find a distributor or locate a store

For more commercial information, fill in the form below

Technical assistance

If you need technical information, fill out the form below

• Personal Audio
• Headphone Amplifiers

Unison Research SH Headphone Amplifier

Unison Research SH Single Ended Class A Headphone Amplifier Unison Research's tradition of Single Ended is well known in markets around the world and has been used to make a component aimed solely at quality. SH is a Single Ended Class A headphone amplifier, made with a two-stage tube circuit and preceded by a passive volume control. The refinement of the tubes is combined with modernity through the internal Dac and the USB input, making the SH the ideal instrument for listening to liquid music with headphones. Asynchronous USB interface compatible with USB 2.0 Audio Class Accepts PCM up to 384kHz and DSD up to 128 Resolution up to 32 bit Latest generation ESS Saber DAC (ESS ES9010K2M) with jitter elimination circuit Galvanic isolation between USB interface and Clock conversion circuit low phase noise residing in the "clean" power supply area to preserve the performance guaranteed by the low jitter 110dB SNR (at 1kHz, "A" weighted, 192kHZ) 0.008% THD + N (at 1kHz, -3dBFS) Specifications Maximum output voltage (THD 1%): "High sensitivity" output 0.5 V into 150 ohm, 0.45 V into 33 ohm, 0.4 V into 10 ohm "Low sensitivity" output 1.4 V into 150 ohm, 1.1 V into 33 ohm, 0.6 V into 10 ohms Frequency response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz ("Low sensitivity" output into 33 ohms) Input impedance: 20k ohm // 100 pF Sensitivity: 0.67 V input for 0.33 V output ("High sensitivity" output, 10 ohm) 0.67 V input for 1 V output ("Low sensitivity" output, 33 ohm) Input stage: Pure Class A, ECC83 / 12AX7 Output stage: Class A, 2 EL84 connected to triode Inputs: 1 RCA line, 1 USB Outputs: 2 in parallel Feedback factor: 16 dB Output Impedance: 6.9ohm. Damping factor: 3 to 20 ohms THD: <0.2% @ 1kHz, 0.5V, <0.8% up to 1 V ("Low sens." Output on 33 ohm) Absorption: 45 W Dimensions: 22.5cm x 12.6cm x 32.2cm Weight: 6 kg

Related Products

Factory authorized, unison research sinfonia stereo tube integrated amplifier, unison research unico 90 integrated amplifier, unison research simply 845 integrated tube amplifier, unison research unico nuovo integrated amplifier, new customer.

Create an account with us and you'll be able to:

• Check out faster
• Save multiple shipping addresses
• Access your order history
• Track new orders

Forgot Password

Fill in your email below to request a new password. An email will be sent to the address below containing a link to verify your email address.

Loading. Please Wait

   Free UK Delivery

• Special Offers

Unison Research SH Simply Headphone - Valve Headphone Amplifier

From £18.44 per month, credit subject to status and affordability. Terms & Conditions Apply

Finance available on all orders over £250

Please note the above quotation is an indicative cost and actual monthly payments may vary by +/- 2p per month. Can't see the finance package you're looking for? Please contact us. Only available to UK residents over 18, subject to terms and conditions. To apply for finance, please add the product to your basket, proceed through checkout and select 'Pay By Finance' as your payment option where you can complete the application form online. Credit subject to status and affordability. Terms & Conditions Apply. Vickers Hi Fi trading as Vickers Hi Fi is a credit broker and is Authorised and Regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed http://www.fca.org.uk

Swipe To Cycle Images

Unison Research SH Valve Headphone Amplifier. 

Unison Research are expanding on their class-leading range of valve-based hi-fi electronics to produce their first ever dedicated headphone amplifier solution. The SH is a single-ended, two-stage full-valve headphone amplifier designed to accommodate traditional analogue and modern computer-based audio sources.

The SH began with the same basic remit as the coveted Simply Italy integrated amplifier; to produce a world-class sound from a specialised device using the best technology available. The result was a fairly simple, linear circuit that produces an output voltage which is more than capable of driving a wide range of headphones, while keeping distortion low throughout the frequency range. This allows the SH to deliver a consistent, coherent sound character when in use.

The input stage uses ECC83 valves, while the output stage uses one EL84 valve (both operating in triode mode). The benefits to using this specific combination of valves are in the reduced power requirements for how the valves are usually employed, resulting in extended life, and the EL84’s ability to drive an output transformer with optimal electrical and sound qualities.

The SH comes equipped with two headphone outputs, connected in parallel for easy switching between headphones, or to accommodate multiple listeners. There is also a “Sensitivity” switch, to ensure the widest possible range of headphones can be comfortably driven by this amplifier. When set to “High Sensitivity”, the output voltage from the amplifier is reduced, and at “Low Sensitivity” it is at its maximum. The added advantage of this switch is for maintaining optimal sound quality while listening to music at lower volumes.

In addition to a standard un-balanced RCA input for connecting any traditional analogue source, the SH is also equipped with a class-leading USB DAC. The asynchronous USB 2.0 technology is the same as found on the recent Triode 25 amplifier, and supports audio formats up to 384kHz PCM and DSD 128. The patented jitter-elimination circuit ensures a great sonic performance, assisted by the galvanic isolation employed between the power areas of the USB interface and the conversion IC. This additional input option brings SH up-to-date with the latest requirements of computer-based audiophiles.

With the use of an Apple lightning to USB connector (not included) you can plug your iPhone/iPod/iPad directly into the SH's DAC and play your hi-res music files straight from your device.

The reason for choosing a headphone-based product was so Unison Research could cater for the growing world of headphone audiophiles, offering them the best valve-based amplifier to enjoy. It’s very difficult for solid-state solutions to compete with the un-rivalled influence valves can have on audio performance, making the SH a must-audition for anyone who takes their sound seriously.

Key Features:

• Compatible with large selection of headphones
• ECC83 Valve used on input stage and EL84 on output stage
• Asynchronous USB interface compliant to USB 2.0 Audio Class
• Resolution up to 32bits/384kHz
• Last generation ESS Sabre DAC with jitter eliminator circuit
• Galvanic isolation between USB interface and conversion circuit
• Connect iPad/iPod/iPhone directly via Lightning to USB cable (not included)
• Low phase noise clocks which reside in the “clean” supply domain to preserve low jitter performance

Technical Data:

   Delivery Standard Shipping and Click & Collect  

   Payment Secure payment available  

YOU MAY ALSO LIKE

The collection address for your order will be as follows: Vickers Hi Fi 8 Concorde Park Amy Johnson Way, Clifton Moor York, YO30 4WT Tel. 01904 - 691600 Store opening hours are Monday to Saturday 10:30 am to 5:30 pm (Closed Sundays and Bank Holidays) We will email you when your goods are ready to be collected. This can be the same day as your order was placed, however in some cases it may take a few days. If your order is urgent please call us before you place your order to check stock availability.

Cookie Terms

This site uses cookies to give you the best shopping experience on our site. By continuing to use this site, you agree to accept these cookies.

UNISON RESEARCH SH HEADPHONE AMP

Sorry, this item is out of stock

CLASS A TUBE HEADPHONE AMP W/DAC

• Maximum Output Voltage (THD 1%) : output "High sensibility" 0.5 V/150 ohm, 0.45 V/33 ohm, 0.4 V/10 ohm output "Low sensibility" 1.5 V/150 ohm, 1.2 V/33 ohm, 0.65 V/10 ohm
• Frequency Response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz (output "Low sensibility", 33 ohm load)
• Input impedance: 20 kohm // 100 pF
• Sensibility: 0.67 V in/ 0.33 V out (output "High sensibility", 10 ohm load)       0.67 V in / 1 V out (output "Low sensibility",33 ohm load)
• Input stage: Pure Class A, ECC83 (12AX7)
• Output stage: Class A, 2 x EL84 triode connected
• Inputs: 1 x line (RCA), 1 x USB
• Outputs : 2 x (parallel connected)
• Feedback factor: 16 dB
• THD: < 0.2% @ 1kHz, 0.5V, <0.8% up to 1 V (output "Low sens.", 33 ohm load)
• Power Absorption: 45 W

Dimensions: 8.6 w x 12.7 d x 5.0 h in. Weight: 13.2 lbs. Warranty: 2 yrs. limited electronics, tubes: 30 days

Ask about our trade-in program

SHIPPING:  The shipping weight of the Unison SH is 16 lbs. Shipment by   FEDEX  Home Delivery /Insured is FREE if your delivery addresses is within the 48 continental states. If your delivery address is in Alaska, Hawaii, Canada or other location outside of the USA, please call (480) 607-2277) or email   [email protected]   to determine the shipping cost and to place your order.  Duties, taxes and fees on shipments to destinations outside of the USA are NOT included in the price.

Authorized Dealer Brands

Luxury Audio Dealer Based in NJ. Operates and Ships Across the USA.

Unison Research SH Single Ended Class A Headphone Amplifier

Couldn't load pickup availability

• Share on Facebook
• Tweet on Twitter
• Pin on Pinterest
• Share by email
• Amplifiers and Preamplifiers,
• Headphone Amps,
• Headphone Gear,
• New Equipment,
• Unison Research

• Product description

Unison Research's tradition of Single Ended is well known in markets around the world and has been used to make a component aimed solely at quality. SH is a Single Ended Class A headphone amplifier, made with a two-stage tube circuit and preceded by a passive volume control. The refinement of the tubes is combined with modernity through the internal Dac and the USB input, making the SH the ideal instrument for listening to liquid music with headphones.

Asynchronous USB interface compatible with USB 2.0 Audio Class Accepts PCM up to 384kHz and DSD up to 128 Resolution up to 32 bit Latest generation ESS Saber DAC (ESS ES9010K2M) with jitter elimination circuit Galvanic isolation between USB interface and Clock conversion circuit low phase noise residing in the "clean" power supply area to preserve the performance guaranteed by the low jitter 110dB SNR (at 1kHz, "A" weighted, 192kHZ) 0.008% THD + N (at 1kHz, -3dBFS)

Specifications

• Maximum output voltage (THD 1%): "High sensitivity" output 0.5 V into 150 ohm, 0.45 V into 33 ohm, 0.4 V into 10 ohm "Low sensitivity" output 1.4 V into 150 ohm, 1.1 V into 33 ohm, 0.6 V into 10 ohms
• Frequency response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz ("Low sensitivity" output into 33 ohms)
• Input impedance: 20k ohm // 100 pF
• Sensitivity: 0.67 V input for 0.33 V output ("High sensitivity" output, 10 ohm)      0.67 V input for 1 V output ("Low sensitivity" output, 33 ohm)
• Input stage: Pure Class A, ECC83 / 12AX7
• Output stage: Class A, 2 EL84 connected to triode
• Inputs: 1 RCA line, 1 USB
• Outputs: 2 in parallel
• Feedback factor: 16 dB
• Output Impedance: 6.9ohm.
• Damping factor: 3 to 20 ohms
• THD: <0.2% @ 1kHz, 0.5V, <0.8% up to 1 V ("Low sens." Output on 33 ohm)
• Absorption: 45 W
• Dimensions: 22.5cm x 12.6cm x 32.2cm
• Weight: 6 kg

Recently viewed

Subscribe to our newsletter.

Enter your email address to stay informed on our latest sales and blog posts.

• Choosing a selection results in a full page refresh.

Your cart is empty

Have an account?

Log in to check out faster.

Recommendations

Unison Research SH Valve Integrated Headphone Amplifier

(Details shown apply to the default selection)

• Description
• Customer Reviews (0)

Unison Research’s unrivalled ability with Single-Ended valve

Unison Research’s unrivalled ability with Single-Ended valve designs is well known around the world. The SH is the company’s first headphone amplifier to benefit from such extensive knowledge and ability. The SH uses a Single-Ended Class A design with only two stages and a passive volume control. The classic refinement of the valves combines with modern technology found in the internal USB DAC to produce something truly stunning.

USB DAC SPECIFICATIONs

• Asynchronous USB interface compliant to USB 2.0 Audio Class
• Accepts PCM up to 384kHz and DSD up to 128x
• Resolution up to 32 bits
• Last generation ESS Sabre DAC with jitter eliminator circuit
• Galvanic isolation between USB interface and conversion circuit
• Low phase noise clocks which reside in the “clean” supply domain to preserve low jitter performance
• 110dB SNR (@ 1kHz, “A” weighted, 192kHZ) 0.008% THD+N (@ 1kHz, -3dBFS)

Be the first to Write a Review for this item!

• Subwoofer Cables
• Speaker Cables
• Digital Cables
• Tonearem Cables
• Optical Cables
• Power Cords
• Mini to Mini /Mini to RCA
• Raw Bulk Speaker Cables
• Headphone Ext. Cables
• Optical Digital Toslink Cables
• Accessories
• Phono Preamp
• Headphone Amp
• Integrated Amplifier
• Factory Authorized Open Box Cable Sale
• power filters

Log in or create an account

• Cart is empty

Unison Research SH Single Ended Class A Tube Headphone Amplifier

Unison research's tradition of single ended is well known in markets around the world and has been used to make a component aimed solely at quality. sh is a single ended class a headphone amplifier, made with a two-stage tube circuit and preceded by a passive volume control. the refinement of the tubes is combined with modernity through the internal dac and the usb input, making the sh the ideal instrument for listening to liquid music with headphones..

This item is a special order. It takes roughly 4 weeks to receive.

Asynchronous USB interface compatible with USB 2.0 Audio Class Accepts PCM up to 384kHz and DSD up to 128 Resolution up to 32 bit Latest generation ESS Saber DAC (ESS ES9010K2M) with jitter elimination circuit Galvanic isolation between USB interface and Clock conversion circuit low phase noise residing in the "clean" power supply area to preserve the performance guaranteed by the low jitter 110dB SNR (at 1kHz, "A" weighted, 192kHZ) 0.008% THD + N (at 1kHz, -3dBFS)

Specifications

• Maximum output voltage (THD 1%): "High sensitivity" output 0.5 V into 150 ohm, 0.45 V into 33 ohm, 0.4 V into 10 ohm "Low sensitivity" output 1.4 V into 150 ohm, 1.1 V into 33 ohm, 0.6 V into 10 ohms
• Frequency response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz ("Low sensitivity" output into 33 ohms)
• Input impedance: 20k ohm // 100 pF
• Sensitivity: 0.67 V input for 0.33 V output ("High sensitivity" output, 10 ohm)      0.67 V input for 1 V output ("Low sensitivity" output, 33 ohm)
• Input stage: Pure Class A, ECC83 / 12AX7
• Output stage: Class A, 2 EL84 connected to triode
• Inputs: 1 RCA line, 1 USB
• Outputs: 2 in parallel
• Feedback factor: 16 dB
• Output Impedance: 6.9ohm.
• Damping factor: 3 to 20 ohms
• THD: <0.2% @ 1kHz, 0.5V, <0.8% up to 1 V ("Low sens." Output on 33 ohm)
• Absorption: 45 W
• Dimensions: 22.5cm x 12.6cm x 32.2cm
• Weight: 6 kg

Related Products

Audia Flight FLS 1 Fully Balance...

Audia Flight FLS Audio Expansion...

Audia Flight FLS DAC Board for F...

Audia Flight FLS Phono Board for...

Bellari HA540 mk2 Headphone Ampl...

Product categories.

• Audio Interconnect
• Closeouts & Specials!
• HCM Audio Exclusives !!
• Headphones and Headphone extension Cables
• Open Box & Pre-Owned Deals
• Phono Cartridges
• Power Amplifier
• Power Filters
• Tonearm Cables

Join our Mailing List

• Testimonials
• Return Policy
• Shipping Policy
• FAQs, Privacy Statement & More
• Closeouts & Specials

HCM AUDIO © Copyright 2023

Payment methods we accept

To revisit this article, visit My Profile, then View saved stories .

• Backchannel
• Newsletters
• WIRED Insider
• WIRED Consulting

Ken Kessler

The best headphone amps for true audio aficionados

Sounds emerging from smart devices need help if they're to feed superior headphones. If you've invested in aftermarket on-, over- or in-ear cans with aspirations to audiophile credibility, you'll learn these need both power and sound quality that simply aren't available from portable devices. WIRED has chosen five amps, ranging from £520 to £6,000. Each has been designed primarily for use with headphones, as opposed to being a full-function DAC or pre-amplifier intended to drive a hi-fi system - but doing double-duty can be a feature. All have one common goal: to take headphone audio to the next level.

Read more: The best headphones for any budget in 2021

Rocking the old-school exposed valves, the QUAD PA-One is a headphone amp that also packs in a full-function pre-amplifier and DAC from one of the UK's most revered audio brands. This means it can serve as the heart of a full system, with the addition of an amp and speakers such as QUAD's compact S-1. The most self-contained of the units, its all-valve topology produces a rich sound for vinyl fans (be warned - it doesn't include a phono stage). It easily drove all three headphones, sounding particularly good with Audeze LCD-X.

Score: 8/10 Cost: £1,199 Usability: Versatile and user friendly. It is able to drive two sets of headphones via 6.35mm sockets Settings: A choice of high or low impedance. Balanced XLR and RCA single-ended. Coaxial, optical and USB inputs Dimensions: 180mm x 284.5mm x 163.5mm (requires desk space) Design: Lancaster grey colour scheme with an attractive matt finish

Pro-Ject is the world's largest turntable manufacturer and a specialist in affordable electronics. The best buy in our round-up, the Head Box DS2 B drives both conventional and balanced headphones. The buttons on the right provide three different current settings to match any headphone type, as well as four gain settings for high-impedance headphones or sensitive in-ear monitors. The device accepts a balanced and a single-ended source, and also has a bypass output, enabling it to feed a recorder or preamp. Sound is punchy, detailed and surprisingly gutsy - a head-banger's delight.

Score: 7/10 Cost: £520 Usability: Four gain settings for perfect level adjustments Settings: Three current levels to match any headphones Dimensions: 206mm x 71mm x 218mm Design: Wooden side-panels in silver/walnut or black/eucalyptus

****: All the headphone amplifiers on test were auditioned with music from an iMac using Fidelia, iTunes and Audirvana, and CDs via the Pro-Ject CD Box DS CD player, either line-out or digital output when appropriate.

Headphones included the 20-ohm Audeze LCD-X (£1,499) as an example of a high-end, open-back, planar-type purist model; the 32-ohm Master & Dynamic MW60 for a semi-open-back model; and the 32-ohm Focal Spirit Classic (£239) for a sealed-back type. Most modern headphones fall into the low-impedance category, so it's unlikely that there are many sets these amps won't drive.

One for hardcore tube purists, but with a twist: although the Unison Research SH is a Single-Ended Class A all-valve design, it has a USB input for a feed from digital sources. This is asynchronous, compliant to USB 2.0 Audio Class, and accepts PCM up to 384kHz and DSD up to 128x. That said, the SH is minimalist and can drive two sets of headphones. Tech spec aside, the sound is pleasingly warm and "analogue-y".

Score: 8/10 Cost: £1,250 Usability: Simple controls. Designed to be used with traditional analogue sources and computers Settings: High or low sensitivity options. Supports 32-bit resolution Dimensions: 225mm x 126mm x 322mm Design: Striking finish in either black or cherry wood. Wood trim on remote control matches corresponding hi-fi component

Coming from a maker of amplifiers and speakers that look like alien spacecraft, the Marquis Memento Mori is a line-level analogue preamp that accepts two line-level sources, such as a CD player, and can drive a separate amp. The front features a 6.35mm headphone socket flanked by the source selector and volume control. The skull is made from CNC-machined, anodised aluminium and is available in ten colours, making it as much a talking point as it is for listening. Sound is silky-smooth and detailed, with plenty of power for difficult headphone loads. The unit can be optimised for a specific set of headphones.

Score: 9/10 Cost: £6,000 Usability: Easy. Just connect source and mains cable; can also serve as a pre-amp Settings: Accommodates one set of headphones via professional connector Dimensions: 150mm diameter Design: The skull's illuminated eyes serve as power meters. A pair of red dials sit beneath the cheekbones for volume and input selection, and the headphone socket can be found in the skull's mouth

Fully Balanced Headphone Amplifier With build quality and finish that belie its relatively low price, the MX-HPA is the dream entry-level model for those who own fully balanced headphones and sources. This is a more recent phenomenon for cans, applicable mainly to high-end models, and is still obscure enough to be filed under "Who cares?" - the vast majority of headphones use a single stereo jack. Musical Fidelity's unit provides a balanced input as well as a normal RCA phono input; its panel allows use of two sets of normal headphones or a balanced set with an adaptor. The unit easily coped with WIRED's test pairs, with audio sounding rich and especially appealing for bass fiends.

Score: 7/10 Cost: £769 Usability: Balanced operation for input and headphones for superior sound Settings: There are two gain positions available to accommodate both high- and low-sensitivity headphones Dimensions: The most compact unit on test, at 220mm x 53mm x 240mm. This is a good choice if space is at a premium Design: Superb construction and luxurious feel

Read more: The best wireless headphones for audio without aggravation

This article was originally published by WIRED UK

Reece Rogers

Adrienne So

Julian Chokkattu

Boone Ashworth

WIRED COUPONS

Save $7-$23 on TurboTax Online

20% Off All H&R Block 2024 Tax Software | H&R Block Coupon

Up to $20 off at Instacart in 2024

Up to 35% Off Your Order with DoorDash Promo Code

Finish Line Coupon - $15 off $150 on sneakers & more

Groupon Coupon: Extra 15% off any size order

• Search forums

Follow along with the video below to see how to install our site as a web app on your home screen.

Note: This feature may not be available in some browsers.

Latest Thread Images

• Equipment Forums
• Headphone Amps (full-size)
• Thread starter Howlin Fester
• Start date Aug 7, 2015

New Head-Fier

Hi guys, some of you have experienced the Unison Research with Grado rs1i ? as they go along ?  

Howlin Fester

500+ head-fier.

mc 73 said: Hi guys, some of you have experienced the Unison Research with Grado rs1i ? as they go along ? Click to expand...

howlin fester said:   Hello mc 73.  I just pulled out my Graso rs1i this morning and hooked them up to the Unison Research SH.  Sound is full,lush and wonderful.   So far I have listened to two 80s blues recordings.  Ry Cooder - The Slide Area from 1982, and Lonnie Mack -Second Sight from 1987. Older recordings mean lower dB mastering levels, and sometimes less bass.  These are Flac conversions from CD through DB Poweramp.   My setup is FLAC L5 > DX50 > line out audioquest green 1/8 inch to RCA > Unison Research SH: Low sensitivity: Volume approximately 10:00 > Grado RS1i.   I can hear deep bass and sparkling highs.  But the highs are what I would call "Tube Smooth".  Highs are not sibilant or annoying.  The bass lines are deep, clear and distinct.  For the mids, I can hear the guitars right where they need to be.   I am not great at hearing soundstage depth, width, and height.  But with the Grados, they are very close to the ears anyway, so not much of a soundstage there.  I can distinctly hear instrument separation.  Piano right, rhythm guitar right, lead guitar left-front, bass left,  Drum rolls from right to left descending.  vocals front.   I'll try some newer recording later and let you know how they fare.  But I expect them to sound great. Click to expand...

mc 73 said: Thank you, your opinion is very helpful to me . in Italy this amplifier is almost unknown . what other amplifiers have listened rs1i ? I can with the combo I would like to listen to rock / blues . thanks and good 2016 ! Click to expand...

howlin fester said:     @mc 73 .  Happy New year to you as well. The SH amplifier is relatively new.  Are you saying that the amp is not known, or Unison Research?  If UR, I find that interesting, since they are an Italian company.   My main genres of music are also rock and blues.  My primary setups have generally been portable.  I really like the Ray Samuels Audio Intruder.  I re-terminated the RS1-i with a mini-4 pin xlr adapter that allows me to change between 1/8, 1/4, and balanced kobiconn connectors.  The RSA Intruder uses the kobiconn.  I really like that setup.  Very full sounding, and Ray makes his amps sound almost tube like.   The other desktop setup I have is a Peachtree Audio Decco65 integrated amp.  This is a solid state integrated amp (you can run speakers) and has a tube on the output stage you can engage or disengage.  I have that at work.   The EnigmaAcoustics Athena A1 is a great sounding amplifier.  However, I will say that I didn't listen to the RS1i with this setup.  I heard it with Fostex TH900, and Audeze LCD-XC.   Hope this helps. Click to expand...

deafanddumb

Just to own a UR product would be amazing....always admired their big wooden and metal objects. Did no-one prefer the wooden fronted version?  

deafanddumb said: Just to own a UR product would be amazing....always admired their big wooden and metal objects. Did no-one prefer the wooden fronted version? Click to expand...

Headphoneus Supremus

Hey there fellas, sorry to necro a thread, but I've got an SH en route and I'm curious to know if anyone else out in head-fi is still using one?  

joedoe said: Hey there fellas, sorry to necro a thread, but I've got an SH en route and I'm curious to know if anyone else out in head-fi is still using one? Click to expand...

• Beautiful design - great blend of retro with contemporary appeal
• Well-done Sabre implementation
• Great all-tube Class-A flavor
• Responds to tube-rolling
• Not tons of power, but enough for my power-hungry Ori

Lilywhite63

Hello everyone I've just joined your forum after looking for news and reveiws about the unison research SH Sorry for gatecrashing your thread but I was wondering how you are all getting on with this amp after a bit more time with it and how it compares to similar type products. I'm mainly a hifi listener but am getting more interested in a home headphone setup, I've been travelling a fair bit lately and have been using a portable set up and looking to get something more upmarket for home use.. I stream most of my music these days but have a now redundant CDT from an old system i could hook up to it. Thanks in advance for any feedback.  

100+ Head-Fier

hello, I am also interested in the Unison SH which should drive the Audeze LCD 4, I could read that a test had been done with an LCD XC but the impedance is not the same, so certain could try some helmets difficult to drive it would be nice to enjoy, thank you  

Hi Folks, This thread is getting on in years but just thought I would resurrect it as I've recently acquired an SH after much deliberation between a LOT of different amps such as the Auris Euterpe and the HA-2SF, the Feliks Elise MK2, a few different Cayins (1A MK2 and HA6) and a few others. I ended up with the SH mostly due to the dual headphone outs for shared sessions. I've been pairing it with ZMF Atticus, Fostex TH610s and HD6XXs and loving it with all of all them. I tried the DAC from my PC but much preferred my Gieseler Kompakt R2R DAC. It is such a refined and beautiful listen at all times. Still breaking it in but I'm pretty sure it's going to be a long term keeper. Anyone else out there still using one or recently gotten one? I haven't opened it up yet to see what the stock glass is yet, but it's sounding pretty damn nice so far...  

Users who are viewing this thread

This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. By continuing to use this site, you are consenting to our use of cookies.

[email protected] • (415) 614-1118

*CHECK OUT OUR SPECIALS *

1628 California Street, San Francisco, CA 94109. SHOWROOM HOURS: Wed-Fri 11-7 Sat 11-6 Sunday 12-6

Unison Research SH Tube Headphone Amp and DAC in Black (available to demo,Sale)

$1,899.00 $1,399.00

Items marked (available to demo) are available in our store for audition. Please give us a call or email in advance for an appointment. SALE WHILE LIMITED SUPPLIES LAST! A world... Read more

• Description

Items marked (available to demo) are available in our store for audition. Please give us a call or email in advance for an appointment.

SALE WHILE LIMITED SUPPLIES LAST!

A world class all tube EL-84 output tube based headphone amplifier operating in pure Class A output. Combined with that tube headphone amplifier is a stellar 32/384K 2xDSD USB DAC module all the same chassis!

Specifications Inputs: 1) RCA single ended analog input feeds the 12AX7/EL-84 all tube headphone amplifier 2) USB input (Class 2.0) feeds the DAC board that handles up to 32/384K PCM, as well as 1X and 2X speed DSD. Native Mac plug and play support. Windows computers require driver installation. Outputs: 2 independent 6.3mm / 1/4″ single ended headphone jacks – both outputs can be run concurrently to feed two sets of headphones simultaneously.

Your cart is empty.

Return To Shop

Taxes, shipping and discounts codes calculated at checkout

I agree with the terms and conditions.

Estimate Shipping

Postal/Zip Code

Add A Coupon

Coupon code will work on checkout page

Your Ears Will Thank You!

Item added to your cart

• Open media 1 in modal
• Open media 2 in modal
• Open media 3 in modal
• Open media 4 in modal
• Open media 5 in modal

Unison Research

Unison Research SH

Couldn't load pickup availability

Unison Research's tradition of Single Ended is well known in markets around the world and has been used to make a component aimed solely at quality. SH is a Single Ended Class A headphone amplifier, made with a two-stage tube circuit and preceded by a passive volume control. The refinement of the tubes is combined with modernity through the internal Dac and the USB input, making the SH the ideal instrument for listening to liquid music with headphones.

Asynchronous USB interface compatible with USB 2.0 Audio Class Accepts PCM up to 384kHz and DSD up to 128 Resolution up to 32 bit Latest generation ESS Saber DAC (ESS ES9010K2M) with jitter elimination circuit Galvanic isolation between USB interface and Clock conversion circuit low phase noise residing in the "clean" power supply area to preserve the performance guaranteed by the low jitter 110dB SNR (at 1kHz, "A" weighted, 192kHZ) 0.008% THD + N (at 1kHz, -3dBFS)

Specifications

Maximum output voltage (THD 1%): "High sensitivity" output 0.5 V into 150 ohm, 0.45 V into 33 ohm, 0.4 V into 10 ohm "Low sensitivity" output 1.4 V into 150 ohm, 1.1 V into 33 ohm, 0.6 V into 10 ohms

Frequency response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz ("Low sensitivity" output into 33 ohms)

Input impedance: 20k ohm // 100 pF

Sensitivity: 0.67 V input for 0.33 V output ("High sensitivity" output, 10 ohm)      0.67 V input for 1 V output ("Low sensitivity" output, 33 ohm)

Input stage: Pure Class A, ECC83 / 12AX7

Output stage: Class A, 2 EL84 connected to triode

Inputs: 1 RCA line, 1 USB

Outputs: 2 in parallel

Feedback factor: 16 dB

Output Impedance: 6.9ohm.

Damping factor: 3 to 20 ohms

THD: <0.2% @ 1kHz, 0.5V, <0.8% up to 1 V ("Low sens." Output on 33 ohm)

Absorption: 45 W

Dimensions: 22.5cm x 12.6cm x 32.2cm

Weight: 6 kg

• Choosing a selection results in a full page refresh.

Request Price

Welcome to Call for price Picker

COPY CLIPBOARD

Unison Research Unico SH

€ 1.790

Gratis leverbaar in 5 tot 15 dagen

14 dagen gratis retour

Description

Additional information.

Unison Research’s unrivalled ability with Single-Ended valve designs is well known around the world. The SH is the company’s first headphone amplifier to benefit from such extensive knowledge and ability. The SH uses a Single-Ended Class A design with only two stages and a passive volume control. The classic refinement of the valves combines with modern technology found in the internal USB DAC to produce something truly stunning.

USB DAC SPECIFICATION Asynchronous USB interface compliant to USB 2.0 Audio Class Accepts PCM up to 384kHz and DSD up to 128x Resolution up to 32 bits Last generation ESS Sabre DAC with jitter eliminator circuit Galvanic isolation between USB interface and conversion circuit Low phase noise clocks which reside in the “clean” supply domain to preserve low jitter performance 110dB SNR (@ 1kHz, “A” weighted, 192kHZ) 0.008% THD+N (@ 1kHz, -3dBFS)

Specifications

• Maximum output voltage (THD 1%) : output “High sensibility” 0.5 V/150 ohm, 0.45 V/33 ohm, 0.4 V/10 ohm output “Low sensibility” 1.5 V/150 ohm, 1.2 V/33 ohm, 0.65 V/10 ohm
• Frequency Response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz (output “Low sensibility”, 33 ohm load)
• Input impedance: 20 kohm // 100 pF
• Sensibility: 0.67 V in/ 0.33 V out (output “High sensibility”, 10 ohm load) 0.67 V in / 1 V out (output “Low sensibility”,33 ohm load)
• Input stage: Pure Class A, ECC83/12AX7
• Output stage: Class A, 2 EL84 triode connected
• Inputs: 1 line RCA, 1 USB
• Outputs : 2 (parallel connected)
• Feedback factor: 16 dB
• THD: < 0.2% @ 1kHz, 0.5V, <0.8% up to 1 V (output “Low sens.”, 33 ohm load)
• Absorption: 45 W
• Dimension: 22,5 cm x 12,6 cm x 32,2 cm
• Weight: 6 kg

Unison Research

Related products.

Fidelice by Rupert Neve – The Precision Headphone Amplifier

Chord Electronics HugoTT2

Chord Electronics Hugo2

Categorieën.

• Bluetooth Speaker
• DAC and other
• Loudspeaker
• Phone Stage
• Pre-Amplifier
• SACD Player
• Speaker Amplifier
• Accessories
• Always On Show
• Power Cables
• Power Distributors
• Blu-ray Player
• DAP - Portable Music Player
• with Speaker Amplifier
• Closed Back Headphones
• Electrostatic Headphone System
• Electrostatic Headphones
• Noise Canceling Headphones
• On-Ear Headphones
• Open Back Headphones
• True Wireless

Abonneer je op onze nieuwsbrief

Schrijf je in om tijdig nuttige informatie in je postvak te ontvangen.

Unison Research S6 review

If you like the warm sounds that only valves can offer, then you'll love this premium integrated amplifier from unison research tested at £2995.

What Hi-Fi? Verdict

In the right system the S6 is capable of sonic magic. Hear it working properly and we defy anyone not to fall for its charms

A silky yet revealing sound

organic presentation

good detail

excellent build

Needs careful system matching

not the last word in attack or bass precision

Why you can trust What Hi-Fi? Our expert team reviews products in dedicated test rooms, to help you make the best choice for your budget. Find out more about how we test.

Some folk believe that technical specifications tell the whole story. If you’re one of those people, then valve amplifiers are not for you.

In just about every area, from power output and distortion levels to energy consumption, such designs are so far behind transistor-based alternatives it’s easy to wonder why manufacturers still bother.

But then, listen to a valve design as good as Unison Research ’s new S6 integrated amp, and it all makes sense.

It’s the S6’s speed that grabs our attention first. It tracks a signal with a impressive lack of inertia, which translates into a wondrous ability to render the nuances of Nina Simone’s voice on I Loves You Porgy with a delicacy we rarely come across.

Richness, power and tenderness: it’s all here, in generous portions. In the midrange and treble the S6 is the real deal.

It’s agile and insightful, delivering the low-level details that define the texture of instruments and voices brilliantly. Not only that it keeps every musical strand in place even with demanding recordings such as Beethoven’s Fifth .

Here, the Unison Research manages decent dynamic swings and delivers them with a confidence barely reflected by the 33W per channel power rating.

Sweet but not squashy-sounding

Conventional wisdom has it that valve amplifiers sound smooth, warm and soft.

Good designs such as the S6 prove things don’t have to be that way.

Yes, it has a sweet presentation and a lack of hardness that few transistor alternatives can rival, but for all that niceness there’s enough transparency for it to sound appropriately brittle with harsh recordings such as The Magnetic Field’s I Don’t Know What to Say .

Hi-fi aspects such as tonal neutrality aren’t ignored, either. The S6 even times decently, though if this aspect of performance is paramount we would point you to the Lavardins and Pliniuses of this world.

The valve stereotype the Unison Research does live up to is the ability to deliver sound in an organic manner.

Dynamic shifts are rendered in a lovely fluid manner, so changes in intensity sound wholly natural with voices or instruments. Most transistor-based rivals sound just a little mechanical and stilted in comparison.

It’s as though they handle subtle level changes in distinct steps, while the S6 varies things on a continuous scale. Once heard, this ability is hard to do without.

Beguiling, but not an all-rounder

This is a beguiling amp, but it isn’t a brilliant all-rounder. With classical music the S6 is spellbinding, and it’s at home with anything acoustic – particularly if it’s well recorded.

However, shift genres to the likes of Eminem or The White Stripes and this amplifier comes up short on attack and bass tautness. Most of the better conventional alternatives will deliver a more attacking performance with music such as this.

However, it’s important to note that even when the S6 isn’t on home turf, the results are enjoyable and the music’s message is still relayed unambiguously.

Its ability to reveal emotion in vocals and tie all the instrumental strands into a cohesive whole continue to shine through. The S6 is capable of sonic magic, but that magic gets just a little diluted with music such as this.

Move away from sound quality and there’s more good news.

Build quality is excellent: all the controls have a solidly engineered feel, and even the remote control – the thing we usually complain about with most high-end products – is an attractive, nice-feeling wooden affair.

The amplifier is available in two good-looking finishes: the black of our review sample and one with a cherry wood front panel.

Class A performance

Technically, this is a relatively conventional valve product. It uses the purist single-ended approach to the output stage rather than the more common push-pull arrangement.

In theory, single-ended operation gives greater sonic purity, though it’s an approach that suffers when it comes to power output and the ability to really grip a speaker.

As is usual on single-ended designs, this amplifier works in Class A mode.

It means the valves run hot (and use a lot of electricity in the process), but sound quality should benefit.

As usual, the spec sheet can only reveal so much. It’s the quality of the components used, plus the engineering compromises chosen that define just how good a product becomes.

The S6’s depth-biased proportions and 26kg weight demand a big (and strong) rack to sit on.

The relatively large quantity of heat generated by the six EL34 output valves mean it’s a product that needs plenty of ventilation, too – placement in a closed cabinet is a definite no-no, though considering how distinctive this amplifier looks, we can’t see many owners wanting to hide it away.

The relatively low power output and single-ended circuit configuration means that careful speaker matching is a must.

The Unison will sound small, congested and soft down in the bass department if things aren’t right.

Get it spot-on and the S6 emerges as a strong product at this kind of money.

Granted, other similar products might better it in other areas, but none stun like the S6 in what it does well.

A spellbinding sound

So good is the S6 in its areas of strength that we find it easy to forgive the lack of outright attack.

Rivals that can better it in this aspect don’t even come close in other areas. It offers a viable alternative to the established class leaders – one where the sonic character is so different from the norm that we can’t imagine a person being undecided in a head-to-head comparison.

So, then, if you fancy something out of the ordinary, and can take the care necessary to build a compatible system of suitable quality, this Unison Research amplifier is a simply terrific buy.

See all our amplifier Best Buys

Follow whathifi.com on Twitter

Join whathifi.com on Facebook

What Hi-Fi?, founded in 1976, is the world's leading independent guide to buying and owning hi-fi and home entertainment products. Our comprehensive tests help you buy the very best for your money, with our advice sections giving you step-by-step information on how to get even more from your music and movies. Everything is tested by our dedicated team of in-house reviewers in our custom-built test rooms in London, Reading and Bath. Our coveted five-star rating and Awards are recognised all over the world as the ultimate seal of approval, so you can buy with absolute confidence.

Read more about how we test