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Overview
The Fostex HP-A4 is a new, improved version of the
acclaimed HP-A3. It supports PCM audio up to 24-bit/192 kHz and DSD audio up to
5.6MHz for superior playback functionality. Dedicated USB driver software is
necessary to install on PC for Windows. Mac OS (10.6.1 or later) works with its
own USB driver. HP-A4 operates on USB bus power and features a front-panel
1/4-inch stereo headphone output, rear-panel stereo RCA outputs, and optical
S/PDIF I/O.
The HP-A4 has 2 gain staging levels, allowing you to boost
the output of the amp by 10 dB without needing to touch the volume knob. HP-A4
offers quick and easy hi-resolution playback in combination with Fostex Audio
Player software. Additional features include Hi/Lo gain selection (10 dB) for
wider range of headphones, asynchronous transfer mode, and digital filter with
selectable roll-off and cut-off characteristics. Founded in 1973, Fostex is an
acclaimed manufacturer of location sound, multi-track recording, and speaker
products.
General Features:
- Fostex
HP-A4 Buss-Powered 24-bit DAC Desktop Headphone Amplifier
- USB
buss powered operation without AC adapter
- Linear
PCM audio up to 24bit/192kHz and DSD audio up to 5.6MHz playback
- Quick
and easy hi-resolution playback in combination with "FOSTEX Audio
Player" software
- HI/LO
Gain selection (10dB) for wider range of headphones
- Asynchronous
transfer mode by using the custom made crystal
- Digital
Filter selecting Roll-off characteristics and Cut-off characteristics
according to the audio source
- Complies
with USB Audio Class 2.0 on Windows XP (SP2 or later) / Vista / 7 / 8 and
MacOS X 10.6 or later
- MicroSD
(SDHC) card drive on the rear panel for future firmware updates
- Authorized
Internet Dealer
- 1-year
Manufacturer's Warranty
Product Specifications:
- Input:
- USB port sampling frequency up to 24bit/192kHz(PCM),
5.6MHz(DSD)
- Digital Connector: optical, square
- Format S/PDIF (16bit/24bit: 44.1 – 192kHz)
- Output:
- Phones Connector: Stereo phone
- Max Output: 100mW (32-ohm loaded)
- THD: less than 0.04% at 1kHz, 32-ohm loaded, 100mW
- Frequency response: 20Hz - 80kHz +/-3dB (1kHz, 32ohm
loaded, 100mW, FS 192kHz)
- Analog Connector: RCA Pin
- Reference output level 2Vrms
- THD: less than 0.01% at 1kHz
- Frequency response: 20Hz - 80kHz +-3dB (at FS 192kHz)
- Digital Connector: Optical, square
- Format S/PDIF (16bit/24bit: 44.1 - 192kHz)
- General:
- MicroSD card slot: microSD card (SDHC)
- Power: USB buss powered
- Power Consumption: 2.5W
- Accessories: 1 x USB cable (1.0m), 4 x rubber foot,
manual
- Dimensions: 113mm(W) x 34mm(H) x 155mm(D) excluding
protruded parts
- Weight: approx. 500g