Key Features

High-Quality ESS SABRE32 DAC
32-Bit/384 kHz Sampling Rate
Supports DSD256 files up to 12.3 MHz
Optical, Coaxial, and USB Digital Inputs
Analog XLR and RCA Inputs
3-Pin XLR, XLR4, 1/4" and 4.4mm Outputs
Includes AC Power Cable

The HDV 820 Digital Headphones Amplifier from Sennheiser is powered by a high-quality ESS SABRE32 DAC (digital-to-analog converter). It has a resolution of 32-bit/384 kHz sampling rate and can play DSD256 files of up to 12.3 MHz. Featuring output connectors such as 3-pin XLR, 4-pin XLR, 1/4", and 4.4mm Pentaconn sockets, the amplifier is also equipped with several input formats to easily connect your headphones to the amplifier.

The HDV 820 performs with digital sources via optical, coaxial, or USB sources and has balanced XLR and unbalanced RCA analogue inputs. This amplifier is designed to complement Sennheiser's high-end headphones range and offers higher resolution and ultra-low distortion, which opens a whole new listening experience for the most demanding audiophiles. Additionally, a power cable is also included.

Rich sound gets richer

How do you make some of the best headphones on the market even better? If you're Sennheiser, you build the HDV 820 headphone amp to play up all the strengths of your flagship HD 800 S open-back 'phones and new closed-back HD 820 headphones. The most obvious matches between the two are in the cosmetics and the connectivity — this is one of the few amps they offer that can accept a balanced 4.4mm headphone cable. But this powerful desktop amp also drives Sennheiser's best headphones to perform at their top potential.

Sennheiser designed this amp to accentuate the sonic advantages of the HD 800 S and HD 820. The HDV 820 spreads out the headphones' large soundstage even wider. And together, the pair delivers airy, musical highs along with taut, detailed mids and a sweet helping of bass precision.

Crystal-clear, low-distortion sound for all

Of course, you can use the HDV 820 with any set of wired headphones that would benefit from clean, controlled power. Which I think covers most of them! Sennheiser uses a symmetrical circuitry design to keep the left and right channel signals completely independent of each other. This practically eliminates interference, so your headphones will better handle large sonic peaks in your music — without distorting.

Sennheiser also includes a 5-stage gain switch to properly match up the power output with your headphones' impedance. That means this amp plays nice with all types of headphone models.

The ins…

A headphone amp can only be as versatile as its connections — and the HDV 820 is ready for all types of music sources. You'll find balanced and unbalanced analog inputs along with optical, coaxial, XLR, and USB inputs for your digital gear. A premium ESS Sabre digital-to-analog converter effortlessly handles high-res music files up to 32-bit/384kHz.

...and outs

This amp will power up to four pairs of headphones simultaneously. There is a four-pin XLR output, along with a Neutrik combination socket standard that will accept a 3-pin XLR or a 1/4" headphone plug.

The HDV 820 also has a stereo pair of 3-pin XLR outputs on the back. So you can use it as a standalone preamp/DAC if you have compatible audio gear.

SPECIFICATIONS

Number of Headphone Channels	Single Channel
Headphone Output Power	480 mW into 600 Ohms (Max)
Frequency Response	10 Hz to 100 kHz
Gain/Trim Range	14 to 46 dB
Dynamic Range	> 115 dB (A-Weighted, 600-Ohm Load)
THD+N	< 0.001%
Crosstalk	93 dB (1 kHz)
Power Requirements	AC Input
AC Input Power	100 to 200 VAC, 50 / 60 Hz
Power Consumption	12 W (Typical) 18 W (Maximum)
Operating Temperature	41 to 113°F / 5 to 45°C
Storage Temperature	-40 to 158°F / -20 to 70°C
Operating Humidity	10 to 80%
Storage Humidity	10 to 90%
Dimensions	12 x 8.8 x 1.7" / 306 x 224 x 44 mm
Box Dimensions (LxWxH)	16.95 x 11.7 x 6.3"
Weight	5.0 lb / 2.2 kg
Package Weight	7.25 lb

Sennheiser HDV 820 Digital Headphones Amplifier