[Tested and Working] FOSTEX Headphone Amplifier HP-A4 (Pretty Good Condition)

【Tested and Working】FOSTEX Headphone Amplifier with Built-in D/A Converter, Hi-Res Compatible HP-A4 (Relatively Beautiful)
DAC & Headphone Amplifier HP-A4

I think it's generally a beautiful item with no noticeable scratches or stains, but there may be some minor scuffs.
Everything in the photos is included.
No operational problems.

I will ship via Yamato Transport on the same day or the next day after payment.

◎Product Details
A headphone amplifier with high-quality DAC functionality.

- Model: HPA4
- Output Terminals: RCA
- Input Terminals: USB, RCA
- Filter Settings: ULTRA, LINE
- Gain Settings: 2.8m, 5.5m
- Digital Output: Yes
- Country of Manufacture: Japan

Capable of playing linear PCM audio up to 24bit/192kHz and DSD audio up to 5.6MHz.
*To play DSD audio, you need DSD-compatible playback software on your computer. This unit supports DoP and ASIO methods.
HI/LO gain switching (10dB) supports a wide range of headphones.
Employs an asynchronous mode using a custom crystal (quartz oscillator).
Equipped with a digital filter that allows you to switch the roll-off characteristics and cutoff frequency according to the sound source.
Equipped with a high-quality DAC (Burr-Brown PCM1792A).
Supports USB Audio Class 2.0