Fostex HP-A4BL User Manual

D/A converter & headphone amplier
HP-A4BL
Thank you very much for purchasing a Fostex product.
This manual provides instructions for basic use of the unit.
Read this before using the unit for the rst time.
Notes:
If you connect the HP-A4BL to a Windows computer via USB, you must install the dedicated USB
Audio Class 2.0 driver which can be downloaded from the Fostex website as follows.
If you use a Mac computer, you do not need to install a driver.
Please use Fostex Audio Player (freeware) for audio playback, which can be found at the URL below.
http://www.fostexinternational.com/
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Owner's Manual
Fostex_HP-A4BL_3L.indb 1 16/03/11 14:14

Fostex HP-A4BL Specifications

General

Type	Headphone Amplifier / DAC
Input	USB, Optical, Coaxial
USB Chip	XMOS
Supported sampling rates (USB)	44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Headphone impedance	16Ω - 600Ω
Power supply	AC adapter
Power Output	150mW (at 32Ω)
Output Power	150mW + 150mW (32Ω)
Frequency Response	20Hz to 20kHz
Signal-to-Noise Ratio	115dB
Total Harmonic Distortion	<0.002%
Supported Sampling Rates	44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Bit Depth	24-bit

Summary

Warnings and Safety Information

Important Safety Instructions

Critical safety precautions for operating the Fostex HP-A4BL.

Hardware Description

Front Panel Controls and Indicators

Detailed explanation of the front panel interface.

Back Panel Connections

Detailed explanation of the rear panel ports and switches.

Connecting and Configuring Your Computer

USB Driver Installation (Windows)

Step-by-step guide for installing the USB driver on Windows.

Software for DSD Playback

Recommended software for playing DSD audio files.

Establishing Computer Connection

Instructions for physically connecting the device via USB.