HP-A7
32bit DAC
32-bit DAC + high-quality headphone amplifier with rich digital inputs.
Features
The unit can also be used as a preamplifier with its abundant inputs, including USB, OPTICAL x2, COAXIAL, and ANALOG.
●Direct out function without volume circuit.
Discrete headphone amplifier with high power transistor in TO-220 package.
Equipped with two headphone outputs with different gains, which can be used according to the impedance of the headphones.
AKM’s high-end 32-bit DAC AKM AK4392 is used.
Low jitter design and independent L/R DAC power supply.
Strong headphone protection by DC detection.
High quality analog parts are used.
High-performance, high-through-rate OP amplifier manufactured by Linear Technology Inc.
Custom-made Nichicon capacitors by Fostex
High-precision metal film resistors for audio manufactured by Takman Electronics Co.
Panasonic PPS film capacitors
WIMA film capacitors
Vibration prevention by machined brass legs and tungsten compound washers.
Specifications
Main Specifications
| input | |
|---|---|
| USB terminal | |
| sampling frequency | Max. 24bit/96kHz |
| interface | USB Full Speed |
| DIGITAL INPUT-OPTICAL(1, 2) terminals | |
| connector | Rectangular Optical |
| (computer) format | S/PDIF (32kHz to 96kHz) |
| DIGITAL INPUT-COAXIAL terminal | |
| connector | RCA pin jacks |
| (computer) format | S/PDIF (32kHz to 192kHz) |
| ANALOG INPUT (L, R) terminals | |
| connector | RCA pin jacks |
| output (e.g. of dynamo) | |
| PHONES(1, 2) jacks | |
| connector | Stereo Standard Jack |
| sensitivity | PHONES 1 : Low gain PHONES 2 : Normal gain |
| Maximum output | 700mW +700mW (32 ohm load) |
| Applicable load impedance | 16 Ω to 600 Ω |
| THD | 0.002% or less (at 1kHz, 32 Ω load, 1Vrms output) |
| frequency response | 10Hz to 150kHz ± 3dB |
| ANALOG OUTPUT(L, R) pins | |
| connector | RCA pin jacks |
| Applicable load impedance | 10k Ω min. |
| THD | 0.002% or less |
| frequency response | 10Hz to 80kHz ±3dB (when 192kHz is used) |
| DIGITAL OUTPUT terminal | |
| connector | Rectangular Optical |
| (computer) format | S/PDIF |
| general | |
| accessory | AC adapter (x 1), power cord (x 1), USB cable (x 1 / 1m) |
| External dimensions | 194(W)x44(H, excluding feet)x230(D, including protrusions) mm |
| Mass of main unit | Approx. 1.6kg |
| power (button on TV, etc.) | DC15V (supplied by the attached dedicated AC adapter) |
| Power consumption | 15W |
*This product complies with the European RoHS Directive.