Used Peavey MP-4 Mark III 100H 4-Channel Powered Mixer

Estimated Year: 1979 (confirmed by rear panel marking)

Made in: USA

Overview

The Peavey MP-4 Mark III Series is a vintage late-‘70s solid-state powered mixer/amp head built during Peavey’s early USA manufacturing era in Meridian, Mississippi. This unit combines a 4-channel mixer with a built-in 100-watt power section (50W per side), making it a compact all-in-one solution for small PA setups, rehearsal spaces, or stripped-down live rigs.

Each channel features gain, contour (tone shaping), and effects send controls, giving you flexibility for microphones, instruments, or line-level sources. The master section includes 3-band EQ, master reverb, and multiple routing options including aux input and effects loop. These units are known for their durability and simple, no-frills functionality—very “plug in and go.”

Because of their solid-state design and punchy power section, these also get repurposed as lo-fi guitar or bass heads, or even as utility mixers for rehearsal rooms and churches.

Features

- 100W total output (dual 50W outputs)

- 4 independent input channels

- Gain, contour (tone shaping), and effects control per channel

- Master volume and master reverb

- 3-band master EQ (low, mid, high)

- Aux input and effects loop

- Multiple output options (main/effects)

- Footswitch jack for effects

- Made in USA (Meridian, MS)

- Compact, rugged vintage Peavey construction

Condition

Good vintage condition.

- Heavy cosmetic wear consistent with age (tolex wear, oxidation on corners, surface wear)

- Faceplate graphics still readable and intact

- Knobs and controls present

- Fully tested and functioning (typical light scratchiness possible in older pots)

Store Policies

- All items are tested before listing and again before shipping.

- Orders typically ship next business day.

- Shipping is available to the continental U.S. only.

- We do not accept trades on shipped items.

- Returns are accepted within 48 hours of delivery. The buyer covers return shipping, and a 20% restocking fee applies. If you have any questions before buying, feel free to message us—we’re happy to help.