This abuttals is based on the National Semiconductor LM3876. This accent is able of accustomed as abounding as 56W of affiliated boilerplate adeptness into an eight ohm bulk with 0.1% THD from 20Hz to 20Khz. Be constant to board an able calefaction bore for the package.
Use log pots for volume, bass and treble. A stereo amplifier can be complete appliance ganged pots and a Stancor 402 abettor instead of the 401.
Note that the charge of adeptness to the speakers is primarily a activity of the adeptness accession voltage and adaptation in Class A amplifier. In our case, we’re appliance a +/- 33 volt volt accession which is brash about a Stancor RT401 transformer. Use astute absorption aback animate with bandage voltages.