Accustic Arts
Amp II
AA_Logo copy

The AMP II – MK4 is a so-called “dual-mono power amplifier”, i.e. apart from the common mains cable both channels are completely separated from each other – from the transformer to the output stage board. This ensures the excellent values, for example, for channel separation and signal to noise ratio, etc. The AMP II – MK4 works with Class A operation in most applications. And, despite its enormous power, the AMP II – MK4 reproduces the finest details with extreme precision, in our opinion just as one would expect from a real reference product.

Voltage gain: 25.0 dB
Power consumption without load: approx. 120 watts
Power supply capacity: approx. 160,000 µF
Input impedance: balanced (XLR): 2 x 16 kΩ
unbalanced (RCA): 15 kΩ
Rated power output (at THD+N = 0,1 %): max. 2 x 750 watts on 2 Ω
max. 2 x 530 watts on 4 Ω
max. 2 x 310 watts on 8 Ω
Crosstalk: 108 dB with 1 kHz
Signal-to-noise-ratio: -96 dBA (ref. 6.325 V)
Distortion factor (THD+N): 0.003 % on 4 Ω load at 1 kHz and 10 watts
Dimensions (H x W x D): 350 x 482 x 430 mm / 13.8 x 19 x 16.9 inches
Weight: approx. 55 kg / 121 lbs.

AMP II – MK4 highlights

  • Dual-mono reference power amplifier with completely isolated power supply for each amplifier channel
  • 20 selected MOS-FET output transistors of finest quality
  • 2 magnetically shielded and encapsulated toroidal core transformers of premium quality for highest output reserves
  • Optimum smoothing thanks to 160,000 µF power supply capacity; Premium quality capacitors (“Made in Germany”)
  • Very high damping factor for perfect speaker control
  • ACCUSTIC ARTS® Damping factor linearization (switchable)
  • Professional protection circuit against clipping, HF oscillations and too high DC offset
  • Integrated switch-on current limitation for highest operational safety
  • Constant low operating temperature due to generously dimensioned heat sinks
  • Balanced input (XLR) and unbalanced input (RCA) – the inputs are switchable
  • All used components and parts are selected and of highest quality
  • Very high quality, gold-plated bi-wiring/bi-amping speaker terminal
  • Extremely stable, massive and resonance optimized housing, fully made of aluminium; inlay made of massive brass, polished and chromed
  • ACCUSTIC ARTS® AMP II – MK4 is “Handmade in Germany”