aPA7 / aPA7.5

Our monobloc power amp provides the ultimate system performance. Cyrus designed Zero-feedback technology and bespoke power supply componentry provides a massive 150watt burst power for truly enthralling dynamic reproduction.

The revised 7.5 version of our powerful monobloc amplifier is ideal for both demanding AV systems and the very finest hi-fi systems. Owners of the aPA7.5  could take advantage of our factory upgrade to full Mono X performance level.

The aPA7 was firmly established as the flagship Cyrus amplifier for three years, the design team have taken time out to re-visit the design and upgrade it with some performance enhancements. The result of this exercise is the aPA7.5 Mono. This amplifier includes all of the characteristics that has made the original aPA7 ‘best in class’ (the famous ‘zero-feedback’ circuit topology, outstanding power and exceptional load tolerance) but with even greater power supply capacity and further extended frequency bandwidth.

A unique zero-feedback amplifier design constitutes the basis of the Cyrus aPA7.5 Mono. This dedicated application of zero-feedback principles, rather than more conventional feedback methods, addresses our belief of amplifying the signal accurately in the first instance. Negative feedback is therefore no longer required to improve circuit linearity. The harmonic distortion character of the aPA7.5 Mono is closely aligned to the response of the human ear. As output level reduces to lower levels where the ear becomes most sensitive to these effects, the distortion produced by the aPA7.5 Mono falls below measurable limits. The result is exceptional musical resolution. The graph below shows that the aPA7.5 Mono’s inherently linear circuits produce negligible distortion at low powers.


  • Distortion – <0.004%
  • Freq Resp – -3 dB
  • Slew rate – 700V/μS
  • S/N Ratio – 114dBA
  • Power – 240W (into 4 Ohms)
  • Weight – 5.5kg
  • Dimensions – H73 x W215 x D360mm