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User Manual for Fostex HP-A4BL High-Resolution DAC Balanced Headphone Amplifier Click to enlarge the picture
Contents of the user manual for the Fostex HP-A4BL High-Resolution DAC Balanced Headphone
- Product category: Headphone Amplifiers Fostex
- Brand: Fostex
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Fostex Headphone Amplifiers
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User manual for the Fostex HP-A4BL High-Resolution DAC Balanced Headphone contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Fostex product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Fostex user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Fostex product will considerably shorten its lifespan!
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Product description The HP-A4BL High-Resolution DAC / Balanced Headphone Amplifier from Fostex is a high resolution digital-to-audio converter and balanced headphone amplifier well suited for professional audio engineers, mastering engineers, and audiophiles. The HP-A4BL supports PCM audio up to 24-bit/192 kHz and DSD audio up to 11.2 MHz. The front-panel offers a balanced 4-pin XLR headphone output, an unbalanced 1/4" stereo headphone output, while the rear-panel offers stereo RCA outputs, optical S/PDIF I/O, and a USB 2.0 connector. The HP-A4BL has 2 gain staging levels, allowing you to boost the output of the amp by 10 dB without needing to touch the volume knob. The selectable filter allows you to cut-off lower frequencies if desired. The HP-A4BL ships with a power supply, USB cable, and 4 rubber feet. -
- Equipped with 4-pin XLR balanced output
- 1/4" / 6.35mm unbalanced output
- Newly developed audio-grade capacitors
- Highly precise crystal with low phase noise
- Playback 24-bit/192 kHz PCM and 11.2 MHz DSD audio
- High performance DAC (Burr-Brown PCM1792A)
- Asynchronous transfer up to 192 kHz/24-bit compatible with USB Audio 2.0
- HI/LO Gain selection (10 dB) for wider selection of headphones
- Digital Filter selecting Roll-Off characteristics and Cut-off frequencies
UPC: 636827306508 In the Box Fostex HP-A4BL High-Resolution DAC / Balanced Headphone Amplifier AC Power Adapter USB Cable 4 x Rubber Feet Limited 1-Year Warranty Table of Contents
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Technical parametersFostex HP-A4BL Specs | | | Sampling Frequency | PCM: 44.1 to 192 kHz
DSD: 2.8 to 11.2 MHz | | Bit Depth | 16/24-bit | | Connector | 1x USB 2.0 high speed
1x S/PDIF Optical (Square) (16/24-bit, 44.1 to 192 kHz) | | | | Connector | Balanced Headphone: XLR (4-pin) Unbalanced Headphone: 1/4" / 6.3 mm Line Output: 2x analog RCA outputs S/PDIF Digital: Optical (Square) (16/24-bit, 44.1 to 192 kHz) | | Maximum Output | Headphones: 300 mW or more (32 Ohms loaded)
RCA Reference Output Level: 2 Vrms (0 dbFS) | | Load Impedance | Headphones: 16 to 600 Ohms Line Output: <10 kOhms | | THD | Headphone Outputs: Less than 0.04% at 1 kHz
RCA Outputs: Less than 0.01% at 1 kHz | | Frequency Response | Headphones: 20 Hz to 80 kHz ±3 dB (32 Ohms, 100 mW)
RCA Outputs: 20 Hz to 80 kHz ±3 dB
Digital: 44.1 to 192 kHz | | | | SD Card Slot | 1x microSD slot (for firmware updates)
Format: FAT32 Compatible Card: microSD card (SDHC), up to 32 GB | | Power | Power Supply: 12 VDC, 1.5 A | | Dimensions (W x H x D) | 5.9 x 1.3 x 6.2" / 150.0 x 34.0 x 157.0 mm, excluding protruded parts | | Weight | 22.2 oz / 630.0 g, approximate | | | | Package Weight | 2.6 lb | | Box Dimensions (LxWxH) | 12.2 x 7.9 x 2.8" |
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