This source for 50 W amplifiers per channel was found in 1967 Delco documentation. Transistors are from that time, difficult to obtain today.
The transducer used in this configuration that appears elsewhere on this site is a piezoelectric...
This 80's General Electric circuit is guarded by the noise-guard for operating current. The...
This amplifier of approximately 6 W uses complementary transistors at the output, which must be...