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Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.
USB DAC Headphone Amplifier Class A 24bit 192kHz DSD128

The Matrix M-Stage HPA-3U+ is an evolution of the brand's famous Class A amplifier with an audio converter and USB input. This amplifier has been completely redesigned and optimized to offer even more music to the experienced enthusiast.
With a selection of gain on the front over three levels, you benefit from a perfect impedance matching on any top-of-the-range sedentary headset. Many technological points have been improved, making this USB headset amplifier even more attractive:
This USB DAC preamplifier is the ally of high-end headphones, including the AKG 702 and Beyerdynamic series. It will bring finesse, dynamism and a very attractive balance.
| A | USB Input 24bit 192kHz |
| B | Stereo RCA input |
| C | Stereo RCA output |
| D | ON/OFF button |
| E | Power supply connector |
| A | Jack 6.35mm headphone output |
| B | Power status LED |
| C | Input selector |
| D | Gain selector (5dB / 10dB / 20dB) |
| E | Volume button |
| F | DSD State LED |
" The headphone amplifier with DAC M-Stage HPA-3U is a very nice device, which has a big mouth and looks indestructible. Using high quality components, it offers first-class sound quality and is full of power. "
" Overall, I recommend the HPA-3U as a strong headphone amplifier "
| Specifications | |
|---|---|
| Product type | Headphone amplifier |
| Inputs | 1x USB-A 1x Single-ended Stereo RCA |
| Outputs | 1x Jack 6.35mm 1x Single-ended Stereo RCA |
| Gain setting | 5dB 10dB 20dB |
| USB interface chip | XMOS U8 |
| USB Transmission | Asynchronous |
| Supported sampling rate | USB : PCM up to 24bit 192kHz / DSD up to DSD128 (DoP and native ASIO) |
| OS Compatibility | Windows XP / Vista / 7 / 8 / 8.1 / 10 (needed driver included) MAC OSX 10.6.4 or later Android (with OTG compatibility) iOS (with Camera USB adapter) |
| RCA Line Output Measurements | |
|---|---|
| SNR | > -112dB Class A |
| THD+N | < 0.0003% @ 1kHz |
| Frequency response | 20Hz - 20kHz (+0.01dB / -0.04dB) |
| Output impedance | 51Ω |
| Power output (@ THD+N = 0.01%) | 2800mW @ 33Ω 420mW @ 300Ω 210mW @ 600Ω |
| Jack 6.35mm headphone output measurements | |
|---|---|
| SNR | > -112dB Class A |
| THD | < 0.0003% @ 33Ω, 325mW, 1kHz, Class A |
| Frequency response | 20Hz - 20kHz (+0.03dB / -0.1dB) |
| Output impedance | 0.2Ω |
| Output power (@ THD+N = 0.01%) | 2100mW @ 33Ω 430mW @ 300Ω 220mW @ 600Ω |
| General | |
|---|---|
| Consumption | < 25W |
| Fuse | AC250V / 500mA 5x20mm |
| Dimensions | 285 x 142 x 49mm |
| Weight | 1.7kg |
| Package | 1x Matrix M-Stage HPA-3U+ 1x Power cable 1x USB cable |