Masterclass IA-4

The #Masterclass #IA4 is 33 Watts of Pure Class A goodness. It weighs a healthy 20 kgs and uses a highly developed version of the #A21 power output stage. There is very little spare room inside the amplifier as the power supply is so large. The pre-amplifier is on two circuit boards and one of them has to be mounted vertically on the back panel.

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