Hex-Amp Power-Output Circuit PUBLIC

Power-Amps of Hex-Amp System for Electric Guitar

Power-amps of a Hex-Amp System for the 6-string electric guitar. Two amplifier circuits shown, using one 2-channel audio amplifier IC. Six such amplifiers are required, using three of the same ICs. The other two power-amp circuits are identical to this except for input and amplifier labels. The IC is the Texas Instruments LM4766T/NOPB 2-channel 40-watt audio amplifier IC, available from DigiKey for $7.11 ea. DigiKey # LM4766T/NOPG-ND. Though rated for up to 40-watts, each amplifier is configured here to provide only 12W RMS maximum for an 8-ohm minimum speaker-load. An example speaker is cited at lower right in the diagram. Six are required, installed in one 6x8 cabinet, or three 2x8 cabinets, or six 1x8 cabinets, but the 6x8 is recommended, though each speaker must have its own connecting means and separate dedicated wiring. A purpose-designed power-supply circuit for this project is shown here at CircuitLab's website under my name. Experimental Circuitry! Fully breadboard test before committing to a soldered build. And house the power-amp circuits in a grounded metal enclosure.