opposed to discrete designs, the IA502 uses an IC to drive
the power stages.
The entire power amplifier circuitry for 2-channels are squeezed
into a tiny TDA7250 10-pin IC. All that's required are four
power darlingtons and some passive components to complete
a high performance stereo amplifier. No biasing is required
as the IC auto biases the output transistors.
The IA502 lends itself well to multi-channel amplification.
A 6~8 channel power amplifier can easily be constructed even