Whether you are troubleshooting a blown output stage, modifying the tone stack, or simply recapping the power supply, do not proceed without the schematic. Seek out the genuine, high-resolution, revision-correct service manual. Your Max 115—and your bass tone—will thank you.
The Max 115 has an effects loop or preamp out/power amp in jacks. The schematic shows the switching jacks. Use an external preamp to feed a clean signal into the power amp input. If it works, the problem is in the preamp. The schematic then guides you through op-amp supply voltages (pins 4 and 8 of TL072s, for example). peavey max 115 schematic exclusive
Using your multimeter, measure DC voltage at the power supply filter capacitors. Refer to the schematic for expected voltages. If +45V is reading +12V, your rectifier or transformer primary may be bad. Whether you are troubleshooting a blown output stage,
Open the chassis, locate the power amp board. The schematic helps you identify test points (TP1, TP2, etc.). Many Peavey boards have these labeled. The Max 115 has an effects loop or
For decades, Peavey has been synonymous with rugged, road-worthy, and surprisingly versatile bass amplification. The Peavey Max 115 stands as a prime example of this philosophy. This 1x15 combo amplifier, often found in rehearsal studios, small clubs, and bassists’ personal practice spaces, is beloved for its punchy low-end response, simple control layout, and near-indestructible construction.