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DACS Audio Purity Stereo Headphone Amplifier

BH #DAPURITY • MFR #PURITY
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DACS Audio Purity Stereo Headphone Amplifier
Key Features
  • Stereo Headphone Amp for Audiophiles
  • Pure Class-A Topology
  • Interference-Free Input
  • Balanced Output Drives Any Headphones
Offering uncompromising audio detail and the lowest possible noise, the Purity Stereo Headphone Amplifier from DACS Audio builds upon the technical innovations of the HeadLite and +Power modules to get the most out of audiophile headphones. With a Pure Class-A output circuit and loads of transient headroom, the Purity headphone amp will make any headphones shine, revealing the true details of your audio content.
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DACS Audio Purity Overview

Offering uncompromising audio detail and the lowest possible noise, the Purity Stereo Headphone Amplifier from DACS Audio builds upon the technical innovations of the HeadLite and +Power modules to get the most out of audiophile headphones. With a Pure Class-A output circuit and loads of transient headroom, the Purity headphone amp will make any headphones shine, revealing the true details of your audio content.

DACS Audio achieves this high level of performance with their unique Purity BDZ power supply, which drains excess voltage and EMF for an output impedance of zero ohms. The balanced XLR-1/4" combo inputs are interference-free, while the balanced XLR 4-pin headphone output sports extremely low crosstalk for the best possible listening experience. Unbalanced RCA inputs and a stereo 1/4" headphone output are also provided for extra connection options. This headphone amp includes a power cable.

Drive Topology
Listening tests with a large mix of headphones confirm DACS' Pure Class-A topology excels with all types of headphones and listening levels. To run in Class-A, the Purity Headphone Amplifier and Purity BDZ Power Supply generate a lot of heat. The case and ultraquiet Noctua fan provide plenty of airflow to keep the temperature stable, whatever the load.
Differential Input and Output
DACS’ balanced input uses an instrumentation format, with hand trimmed CMRR to give the most accurate interference free signal.

Then DACS looked at balanced headphones. The Purity Headphone Amplifier provides remarkably low crosstalk between the two independent amplifier channels; using balanced output connections. That channel independence is maintained without compromise from the Purity BDZ Power Supply all the way to the ears.

Purity Power Supply
The new Purity BDZ Power Supply uses a superstable, superlow noise op-amp-based design, with zero-ohm output impedance. When driven hard, headphones produce back EMF generated by current flowing back toward the voltage regulator, causing instability. In conventional PSU designs, this back EMF significantly reduces the PSU’s performance, with the amplifier losing control of the headphones and generating distortion. DACS’ unique Purity BDZ Power Supply design sinks that current away ensuring zero-ohm impedance and total output voltage stability, regardless of what's happening at the headphone level.

DACS Audio Purity Specs

Key Specs
Number of Headphone Channels
Single Channel
Recommended Headphone Impedance
Not Specified by Manufacturer
Headphone Output Power
Not Specified by Manufacturer
Audio I/O
1/4" / XLR 4-Pin Balanced (Headphone)
Combo XLR-1/4" / RCA (I/O)
Digital Audio I/O
No
USB
No
Wireless
No
Power Requirements
AC Input
Form Factor
Tabletop
Number of Headphone Channels
Single Channel
Recommended Headphone Impedance
Not Specified by Manufacturer
Headphone Output Power
Not Specified by Manufacturer
Digital Chipset
No
Analog Circuitry
Op-Amp:
EQ
No
Display
No
Connectivity
Analog Audio I/O
1x 1/4" TRS Unbalanced Headphone Output
1x XLR 4-Pin Balanced Headphone Output
2x Combo XLR-1/4" TRS Balanced/Unbalanced Line Input (1 Stereo Pair)
1x Stereo 2RCA Unbalanced Line Input
Digital Audio I/O
No
USB
No
Wireless
No
Performance
Frequency Response
5 Hz to 20 kHz ±0.15 dB
Maximum Input Level
XLR Line Inputs:
+3 dB

RCA Line Inputs:
+10 dB
Dynamic Range
124 dB
Impedance
Headphone Outputs:
< 0.1 Ohms
THD+N
0.00078% (at 1 kHz, +18 dBu Input)
0.00095% (20 Hz to 20 kHz)
SNR
124 dB
Crosstalk
-110 dB
Power
Power Requirements
AC Input
Ground Lift
No
AC/DC Power Adapter
No
Physical
Dimensions
11.8 x 8.3 x 3.9" / 30 x 21 x 10 cm (Including Controls and Protrusions)
Weight
5.5 lb / 2.5 kg

DACS Audio Purity Reviews

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