Following numerous correspondents' requests for an amplifier with a higher power output than the 25W MosFet, a 60–90W High Quality power amplifier design is offered here.
The circuit layout is similar to that of the aforementioned amplifier, but the output pair is made up of the incredibly durable IRFP240 and IRFP9240 MosFet devices, while the preceding stages use well-known high voltage Motorola transistors.
The supply rails voltage was prudently maintained at the relatively low value of and - 40V. For those who want to explore, the supply rail voltage might be increased to a maximum of and - 50V, which would enable the amplifier to go closer to the target of 100W into 8 Ohm.
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