Accustic Arts

Mono IV


Introducing the Reference Class MONO IV Power Amplifier, a pinnacle of audio engineering. Featuring 20 premium MOS-FET output transistors, it boasts two magnetically shielded and encapsulated toroidal core transformers for exceptional power reserves.

With a maximum total transformer power of 1200 VA, the MONO IV ensures unparalleled performance. Its design incorporates over 80,000 µF power supply capacity and premium capacitors for optimal smoothing. Achieving perfect speaker control, the amplifier also offers comprehensive protection against clipping, oscillations, and DC offset.

The MONO IV is equipped with balanced (XLR) and unbalanced (RCA) inputs, while WBT loudspeaker terminals guarantee top-notch connectivity. All components are meticulously chosen for their quality, contributing to the amplifier’s superior performance. The unit’s robust build, including a massive aluminum housing with polished brass inlays, epitomizes the commitment to craftsmanship and excellence that defines ACCUSTIC ARTS®.


  • Reference class mono power amplifier
  • 20 selected MOS-FET output transistors of finest quality
  • Two magnetically shielded and encapsulated toroidal core transformers of premium quality for highest output reserves
  • Maximum total transformer power: 1200 VA (watts)
  • Optimum smoothing thanks to more than 80,000 µF power supply capacity; Premium quality capacitors (“Made in Germany”)
  • Very high damping factor for perfect speaker control
  • Professional protective circuit against clipping, HF oscillations and too high DC offset
  • Constant low operating temperature due to generously dimensioned heat sinks
  • Balanced input (XLR) and unbalanced input (RCA) – the inputs are switchable on the rear panel
  • WBT loudspeaker terminals
  • All used parts and components are selected and of highest quality Premium quality, gold-plated bi-wiring / bi-amping speaker terminals Mains power switch on the front panel
  • Extremely stable and resonance optimized, massive aluminium housing; inlay made of massive, high gloss polished and chromed brass
  • ACCUSTIC ARTS® MONO IV is guaranteed “Handmade in Germany”


Voltage gain: 30.0 dB
Power supply capacity: more than 80.000 µF
Input resistance: balanced (XLR): 2 x 20 kΩ
unsym. (RCA/Cinch): 100 kΩ
Rated power output: approx. 900 watts on 2 Ω
approx. 760 watts on 4 Ω
max. 510 watts on 8 Ω
Signal to noise ratio: -96 dBA (ref. 6.325 V)
Intermodulation distortion: 0.007 % with 10 watts on 4 Ω
Distortion (THD+N): 0.004 % on 4 Ω load with 1 kHz and 10 watts
Power consumption: approx. 120 watts (without load)
Dimensions (H x W x D) 340 x 470 x 440 mm / 13.4 x 18.5 x 17.3 inches
Weight: approx. 42 kg / 93 lbs
+ 12 kg / 27 lbs flight case
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