Peavey Max 115 Schematic Exclusive Page

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.

If you’ve successfully repaired or modded your Max 115 using the original schematic, share your experience in the comments below. And remember: Always discharge the filter capacitors before touching any component. High voltage can be deadly. Disclaimer: This article is for educational purposes. Amplifier repair involves high voltages. If you are not trained in electrical safety, please consult a qualified technician. peavey max 115 schematic exclusive

However, like any hard-working piece of analog gear, the Max 115 is not immune to age. Common issues like crackling pots, sudden volume drops, blown power transistors, or a dead preamp section can sideline this workhorse. This is where the hunt begins—the search for the . For decades, Peavey has been synonymous with rugged,

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. If you’ve successfully repaired or modded your Max

If the power amp is dead, pull the output transistors and test them with a multimeter’s diode mode. The schematic will tell you if those transistors are NPN or PNP. Replace in matched pairs. After soldering, use the trimpot (often labeled VR1) to set bias according to the schematic’s exact millivolt reading across R85 and R86—usually between 3mV and 8mV for Class AB operation.

If you search online, you will find several schematics labeled “Peavey Max 115.” Some are for older “black knob” versions. Others are for the “silver stripe” era. A few rare ones are for the export models with different voltage taps. The problem is that using the wrong schematic will lead you down a path of frustration, blown parts, and potential fire hazards.

The original Max 115 has a natural roll-off below 60Hz to protect the speaker. By tracing the preamp’s coupling capacitors on the schematic, you can increase the value of C5 (usually 100nF) to 470nF or 1µF. This extends the low-end response at the risk of exceeding speaker excursion—use with caution. Conclusion: Why the Peavey Max 115 is Worth the Effort In an era of lightweight Class D amplifiers and DSP modeling, the Peavey Max 115 remains a relevant, repairable tool. It has a soulful, thick bass response that many modern amps lack. Better yet, it was built before the era of surface-mount components and proprietary ICs; almost every part is a standard, off-the-shelf item.