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Buongiorno Cuffiofili!
Un prodotto professionale molto interessante!
FOSTEX HP-A7 32 BIT DAC + Headphone Amplifier
HP-A7 has various digital input 32bit DAC and high quality headphone amplifier
It also works as pre-amplifier supplying USB, OPTICAL, COAXIAL, ANALOG inputs
HP-A7 does not use volume circuit, but direct out system
Discrete headphone amplifier by TO-220 package big capacity transistor
HP-A7 mounts 2 headphone output which is different type gain, adopting each impedance
Adopt high quality 32bit DAC AKM AK4392
Low jitter designed L/R individual DAC power
DC detecting high performance headphone protection system
HP-A7 adopts high quality analog parts, Linear Technology Corporation high performance high through rate OP amplifier, Fostex original customized NICHIKON condenser, TAKMAN ELECTRONICS Precision metal film resistor, Panasonic PPS film condenser and WIMA film condenser
Pure brass bases and tungsten compound washer suppress vibration.
Specification
[Input]
USB port
Sampling frequency: up to 24bit/96kHz
Interface: USB Full Speed
DIGITAL INPUT-OPTICAL (1, 2) terminal
Connector: Square optical
Format: S / PDIF (32kHz ~ 96kHz)
DIGITAL INPUT-COAXIAL jack
Connector: RCA pin jack
Format: S / PDIF (32kHz ~ 192kHz)
ANALOG INPUT (L, R) terminal
Connector: RCA pin jack
[Output]
PHONES (1, 2) terminal
Connector: stereo phone jack
Sensitivity: PHONES 1: Low gain PHONES 2: Gain normal
Maximum output: 700mW (load ohm 32)
Load Impedance: 16 ~ 600 ohm
THD: 0.002% or less (at 1kHz, load 32 ohm, 1Vrms output)
Frequency Response: 10Hz ~ 150kHz +/- 3dB
ANALOG OUTPUT (L, R) terminal
Connector: RCA pin jack
Load Impedance: 10k ohm or more
THD: 0.002% or less
Frequency Response: 10Hz ~ 80kHz +/- 3dB (192kHz is used)
DIGITAL OUTPUT jack
Connector: Square optical
Format: S / PDIF (32kHz ~ 96kHz)
[General]
Accessories: AC Adaptor (x 1), power cord (x 1), USB cable (x 1), manual (x 1)
Dimensions: 194 (W) x 44 (H) x 230 (D) mm
Weight: about 1.6kg
Power: DC15V (supplied from the supplied AC adapter only) 100~240V (50Hz/60Hz)
Power consumption: 15W
http://www.headfonia.com/fostex-hp-a7-and-hp-a3-32bit-dacs/
http://cgi.ebay.it/FOSTEX-HP-A7-32-BIT-DAC-Headphone-Amplifier-/390309376476
https://www.youtube.com/watch?v=bkHxwtbu5hA
Un prodotto professionale molto interessante!
FOSTEX HP-A7 32 BIT DAC + Headphone Amplifier
HP-A7 has various digital input 32bit DAC and high quality headphone amplifier
It also works as pre-amplifier supplying USB, OPTICAL, COAXIAL, ANALOG inputs
HP-A7 does not use volume circuit, but direct out system
Discrete headphone amplifier by TO-220 package big capacity transistor
HP-A7 mounts 2 headphone output which is different type gain, adopting each impedance
Adopt high quality 32bit DAC AKM AK4392
Low jitter designed L/R individual DAC power
DC detecting high performance headphone protection system
HP-A7 adopts high quality analog parts, Linear Technology Corporation high performance high through rate OP amplifier, Fostex original customized NICHIKON condenser, TAKMAN ELECTRONICS Precision metal film resistor, Panasonic PPS film condenser and WIMA film condenser
Pure brass bases and tungsten compound washer suppress vibration.
Specification
[Input]
USB port
Sampling frequency: up to 24bit/96kHz
Interface: USB Full Speed
DIGITAL INPUT-OPTICAL (1, 2) terminal
Connector: Square optical
Format: S / PDIF (32kHz ~ 96kHz)
DIGITAL INPUT-COAXIAL jack
Connector: RCA pin jack
Format: S / PDIF (32kHz ~ 192kHz)
ANALOG INPUT (L, R) terminal
Connector: RCA pin jack
[Output]
PHONES (1, 2) terminal
Connector: stereo phone jack
Sensitivity: PHONES 1: Low gain PHONES 2: Gain normal
Maximum output: 700mW (load ohm 32)
Load Impedance: 16 ~ 600 ohm
THD: 0.002% or less (at 1kHz, load 32 ohm, 1Vrms output)
Frequency Response: 10Hz ~ 150kHz +/- 3dB
ANALOG OUTPUT (L, R) terminal
Connector: RCA pin jack
Load Impedance: 10k ohm or more
THD: 0.002% or less
Frequency Response: 10Hz ~ 80kHz +/- 3dB (192kHz is used)
DIGITAL OUTPUT jack
Connector: Square optical
Format: S / PDIF (32kHz ~ 96kHz)
[General]
Accessories: AC Adaptor (x 1), power cord (x 1), USB cable (x 1), manual (x 1)
Dimensions: 194 (W) x 44 (H) x 230 (D) mm
Weight: about 1.6kg
Power: DC15V (supplied from the supplied AC adapter only) 100~240V (50Hz/60Hz)
Power consumption: 15W
http://www.headfonia.com/fostex-hp-a7-and-hp-a3-32bit-dacs/
http://cgi.ebay.it/FOSTEX-HP-A7-32-BIT-DAC-Headphone-Amplifier-/390309376476
https://www.youtube.com/watch?v=bkHxwtbu5hA
