Zapco Z-150.4 AP (AB class) audiophile power amplifier (4-channel).

Zapco Z-150.4 AP (AB class) audiophile power amplifier (4-channel).

Class AB Competition Audiophile Amplifiers, the ultimate Zapco Sound Quality Series
The Z-Series AP amplifiers. Home? Absolutely! In home or in car, the job of an amplifier is the same; pure, accurate sonic reproduction. 
The only difference is the power supply. 
If you really want to hear what your home speakers can do, get a AC~DC power supply and a Zapco Z-Series AP amplifier. 

Features and Functions
- 4-Channel, Class-AB, Competition Audiophile Amplifier
- Signal to noise ratio of over 110dB
- Coupled the output drivers
- Highest HFE (Gain) Sanken selected output devices
- Differential balanced input stage
- 0.1% resistors for lowest possible noise floor
- TI LME49720 (BJT) op-amps on the inputs
- TI LME49720 (BJT) op-amps in the signal path
- WIMA MKS2 series caps in the signal path
- Extremely low ESR caps throughout
- Proprietary patented RCA connectors
Technical Specifications - Power @ 4Ω: 4 x 150 watts
- Power @ 2Ω: 4 x 275 watts
- Power @ 1Ω: 4 x 400 watts *
- Power @ 4Ω Bridged: 2 x 550 watts
- Power @ 2Ω Bridged: 2 x 800 watts *
- THD @ Rated Power < 1%
- Signal to Noise Ratio > 110dB
- Frequency Response 10Hz to 30,000Hz ±1dB
- Input Sensitivity 1v to 9v
- Net Dimensions (mm): 190(W) x 62(H) x 440(L)
- Overall Dimensions (mm): 190(W) x 62(H) x 468(L)

*AP amplifiers are stable at 1Ω and 2Ω Bridged only when used with music signal and with proper ventilation.