Integrated amplifiers — Audio Analogue AACento

The integrated amplifier Audio Analogue AACento is built according to a zero-feedback scheme - both in the preamplification section and in the output stages. The signal circuits use ceramic resistors of increased size - this reduces the total heat. Switching of sources is carried out using electromagnetic relays, and the precision digital volume control (but the signal in chain always remains analog) does not use operational amplifiers. The linear power supply contains a toroidal transformer with a power of 480 watts. Cooling radiators for the output stage transistors are located inside the case.

The Audio Analogue AACento commutation unit includes three linear unbalanced inputs on RCA connectors and one balanced input on XLR, there is also an output from the preamplifier, a mono output for sub, and a direct input to the dedicated power amplifier. The built-in phono preamplifier is suitable for both moving magnet (MM) and moving coil (MC) pickup heads, the amplifier (also on discrete elements) for headphones, operating in pure class A and delivering 1,000 mW into a 32 Ohm load. The input impedance is 47 kOhm, and the sensitivity is declared at 0.6 V.

The output power of the Audio Analogue AACento amplifier is 100 watts per channel when driving loudspeakers with an impedance of 8 Ohms - the power doubles to 200 watts when the impedance of the speakers decreases to 4 Ohms. The output impedance does not exceed 0.4 Ohms (!), and the upper frequence level is limited to 100 kHz at the -3 dB. The front panel of the case is turned from a solid aluminum billet, as is the case of the remote control. The Audio Analogue AACento weighs 14 kilograms.