Fostex HP-A4BL - Headphone amp and DAC balanced headphone out

• Equipped with 4-pin XLR balanced output
  
• Newly developed audio-grade capacitor is adopted
  
• Highly precise crystal with low phase noise is adopted
  
• Playback 24bit/192kHz PCM and 11.2MHz DSD audio
  
• High performance DAC (Barrbrown PCM1792A) is equipped
  
• Asynchronous transfer up to 192kHz/24bit compatible with USB Audio 2.0
  
• HI/LO Gain selection (10dB) for wider selection of headphones
  
• Digital Filter selecting Roll-Off characteristics and Cut-off frequencies

Specifications

Input
[USB] terminal
Interface :USB 2.0 Hi Speed
Sampling Frequencies :PCM 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz DSD 2.8MHz, 5.6MHz, 11.2MHz
Quantization :16bit, 24bit
[Digital In] terninal
Connector :Optical, Square
Format :S/PDIF
Sampling Frequencies :44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Quantization :16bit, 24bit

Output
[PHONES BALANCED] terminal
Connector :XLR (4-pin)
Maximum output :300mW or more (32 ohm)
Load impedance :16 - 600 ohm
THD :less than 0.04% (at 1kHz)
Frequency Response :20Hz - 80kHz (+-3dB, 32 ohm, 100mW)

[PHONE UNBALANCED] terminal
Connector :1/4" stereo jack
Maximum output :150mW or more (32 ohm) Applicable load impedance :16 - 600 ohm
THD :less than 0.04% (at 1kHz)
Frequency Response :20Hz - 80kHz (+-3dB, 32 ohm, 100mW)

[OUTPUT] (L,R) terninal (Analog output) Connector :RCA Pin
Reference output level :2Vrms (0 dBFS) Applicable load impedance :less than 10k ohm THD :less than 0.01% (at 1kHz)
Frequency Response: 20Hz-80kHz (+3dB)

[DIGITAL OUT] terminal
Connector :Optical (square)
Format :S/PDF
Frequency Response :44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Quantaization :16, 24bit

General
[microSD] card slot (for firmware upgrade only) Format: FAT32
Compatible card: microSD card (SDHC), up to 32GB
Accessories :Rubber foot (x4), USB cable, Manual, AC adapter
Power supply :DC12V
Measurements :150(W) x 34(H) x 157(D)mm including protrusion
Weight:approx. 630g