Headphone Amplifier & Preamplifier

The HP-7 is a top quality headphone amplifier and preamplifier featuring a high end audio active volume control design. The double mono active volume control is made with 200 step 0.5dB top class 1% single resistors per channel for high end audio performance.

The innovative design developed for the HP-7 allows matching wide impedance headphones from 20 to 1000Ohm with no need of any manual adjusting.

The HP-7 enables superior sound purity with any audio system and as all Micro Line units it also features an optional external super power supply (PSU-7).

The modern compact luxury size helps the HP-7 being easily installed for building a complete Micro Line system with high class convenient products.

Input Impedance

proprietary design variable
100% headphone matching stability
>120dB Dynamic Range
1 pair RCA Line input
1 pair XLR balanced Line input
1 pair RCA Line Output
1 pair XLR balanced Line Output
1 Pair RCA Preamp Output
1 pair XLR balanced Preamp Output

THD (Total Harmonic Distortion)

0,001% @ 20Hz-20KHz

Frequency Response

10Hz – 50KHz @ +/- 3dB

Output Impedance

0,02Ohm @ 1KHz

Signal/Noise Ratio


Power Supply

Hybrid with temperature automatic stabilizer

Power Consumption

50Watt max.

Optional PSU

Port availability setup


200mm L x 80mm H x 260mm D


3 Kg (7lbs.)