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Arcam AVR 750 AV Receiver - Picture 1 of 2
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Arcam AVR750 7.1 Channel 210 Watt Receiver

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Price:
£2,325.00
+ £258.60 postage
Estimated delivery Thu, 30 May - Tue, 18 Jun
Returns:
30 days return. Buyer pays for return postage.
Condition:
Opened – never used
A combination of Class A and Class B, the Class AB amplifier has a much higher efficiency than Class A but much less distortion than Class B. This is done by biasing both transistors to conduct a little at and near to zero signal output – the point where Class B amplifiers introduce gross non-linearities. They then transition to Class B for larger signal currents. For any given amplifier design there will be an optimum bias current which minimises (but does not fully eliminate) crossover distortion. A typical bias current is 50mA; thus the quiescent dissipation in our 100W output stage is 80V x 50mA = 4 Watts, just 2% of the Class A example above. Most commercial power amplifiers are Class AB designs. These terms refer to amplifier classes where, in the interests of higher efficiency than.