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A Review On: Fostex HP-A4 32 bit multi-format audio converter D/A and premium Headphone Amplifier

Fostex HP-A4 32 bit multi-format audio converter D/A and premium Headphone Amplifier

Rated # 66 in DACs
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Audio Quality
Design
Quality
Value
10shot9miss
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Pros: Format support, sound quality, amazing build quality

Cons: Front panel easily scratched, low output power

Excuse my English

 

First off the DAC is 24bit no matter if its on PC/Mac/Linux
it Decodes PCM 192K and DSD 2.8/5.6 MHz

 

Build quality: One of the best on the market. the casing of the unit is 3mm thick aluminum. Components on the circuit board are neatly laid out. The HP-A4 have its own power regenerator, therefore inconsistant usb power output during operation don't affect the sound quality much.

 

Sound Quality: I don't have high end headphones, but Low impedance phones really sounds good (<150 ohm). The sound is balanced.

 

Filters: Fast and Slow roll-off for PCM, Low and High cut for DSD. I can't really hear the difference though, but DSD tend to sound better with the Low cut filter.

 

There are also other features:
Optical input and output, can be used as a converter. the output is always on.
RCA output, i also have powered speaker that I use with the HP-A4.

 

Specs from fostex jp website:

 

Output power:

32 ohm load: 100mW

300 ohm load: 20mW

 

DAC chip: Taxas Instrument PCM1792A

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