<p>GZHA mini-amplifiers are representign latest D-class technology that is also used in OEM-amplifiers. Main difference to traditional D-class is much better sound quality throughout whole bandwith. It is impossible to say in a blind test that are you listening to good AB-class amp or GZHA mini-amplifier.</p>

TECHNICAL DATA

High-efficient mono class D amplifier
• 1 ohm stable
• Variable high pass filter
• Variable low pass filter
• Phase switch (0°/180°)
• Adjustable bass boost (@ 45 Hz)
• Stereo RCA input and output
• High-level input with auto-on function
• Link mode (with 2 units)
• Adjustable input sensitivity
• Turn-on delay
• Thermal protection circuit
• Short circuit protection
• Overload protection circuit
• Owner’s manual enclosed
• Wired bass level remote control
(GZTA Bassremote) included

Amplifier type Mono class D
RMS Power @ 4 Ω CEA Standard CEA-2006-A 220 W (1% THD+N)
RMS Power @ 2 Ω CEA Standard CEA-2006-A 390 W (1% THD+N)
RMS Power @ 1 Ω CEA Standard CEA-2006-A 630 W (1% THD+N)
750 W (10% THD+N)
RMS Power @ 2 Ω in linked mode (of two amplifiers)
CEA Standard CEA-2006-A
1260 W (1% THD+N)
1500 W (10% THD+N)
Damping factor 100
Low pass filter 30 Hz – 250 Hz (12 dB/Oct)
High pass filter (Subsonic) 10 Hz – 50 Hz (12 dB/Oct)
Band pass filter 10 Hz – 250 Hz (12 dB/Oct)
Bass Boost 0 ~ +12 dB (@ 45 Hz)
Frequency response 10 Hz – 250 Hz (± 1 dB)
Input sensitivity 300 mV – 6 V (± 5%)
Bass remote 
Fuse(s) 2x 30A
Dimensions w x h x l (mm) 135 x 52 x 210
Dimensions w x h x l (inch) 5.32 x 2.05 x 8.27.