The History of the Peavey Mace

In the ever-evolving world of guitar amplification, few amps carry the curious mystique and sheer sonic muscle of the Peavey Mace. Built in the 1970s, this 160-watt hybrid amplifier made waves with a tone that could peel paint, a feature set that raised eyebrows, and a footprint as massive as its sound. At a time when guitarists were chasing the harmonic bliss of Marshalls, the shimmering headroom of Fender Twins, or the searing gain of Mesa Boogies, the Peavey Mace carved out a lane all its own—one of unapologetic volume, rugged engineering, and tonal quirkiness.

Design Philosophy: Muscle First, Convention Later

Hartley Peavey’s company was never one to follow trends—it built gear to endure bar fights and tour buses. The Mace reflected that ethos. Its massive 160-watt RMS rating through six 6L6GC power tubes meant this thing wasn’t just loud—it was earthquake-level loud. The preamp, interestingly, was solid-state, a hybrid approach that was unconventional at the time but practical. Tubes where it mattered for warmth and power; transistors where reliability and cost-efficiency counted.

At its core, the Mace was a stage amp—no boutique charm, no tweed nostalgia. This was built to roar.

The Control Layout: A Tweakable Beast

Front panel real estate on the Peavey Mace was used wisely, packed with no-nonsense controls. Here’s what players had at their fingertips:

• Pre Gain – Acts like a traditional gain control, adjusting the signal before it hits the power amp section.
• Post Gain (Master Volume) – Adjusts the overall output volume, allowing for some preamp saturation at lower levels.
• Treble – High-frequency shaping.
• Middle – Controls the midrange scoop or punch.
• Bass – Boost or cut low-end frequencies.
• Presence – Adds high-frequency sparkle and articulation to the power section.
• Reverb – Controlled via a dedicated knob (spring-based tank).
• Speed and Intensity – For the built-in phase shifter, a rare inclusion in amps of the era.

The tone stack was active—meaning EQ bands had a more dramatic effect than traditional passive Fender-style circuits.

That Built-In Phase Shifter: A Wild Move

What truly made the Mace stand out in the ‘70s amp landscape was its built-in phase shifter. Not a tremolo. Not a reverb. A full-blown, analog, sweeping phase shifter with its own Speed and Intensity knobs.

This was unheard of at the time. Most players were still buying separate stompboxes like the MXR Phase 90 or Electro-Harmonix Small Stone. Having one integrated into the amp added a lush, swirling modulation that turned solos into psychedelic landscapes. Technically, this was accomplished with transistor-based phase-shifting stages, using variable resistors (potentiometers) and capacitor networks to sweep the signal.

It was a bold, almost eccentric design choice—exactly what made the Mace memorable.

The Engineering: Heavy Metal in Every Sense

From a component-level perspective, the Mace was a beast of utility:

• Vacuum Tubes: Six 6L6GC tubes powered the output stage, delivering clean, articulate highs and a tight low-end response.
• Transistors: The preamp was solid-state, using bipolar junction transistors (BJTs).
• Resistors and Capacitors: Backbone of voltage control and tone shaping.
• Inductors/Chokes: Helped smooth power filtering and reduce noise.
• Diodes: Used for AC to DC conversion and signal clipping.
• Potentiometers (Pots): Controlled every parameter from EQ to phase sweep.
• Switches: Footswitchable toggling of reverb and phase shift.
• Reverb Tank: Spring-based, offering ambient depth.
• Transformers: Oversized for maximum headroom and durability.

No digital components here—no ICs or DSPs—just analog firepower from top to bottom.

Legacy: Skynyrd, Volume, and Cult Status

The Peavey Mace earned a notable place in rock history when Lynyrd Skynyrd’s Gary Rossington and Allen Collins used it as their primary amp on stage. Combined with their Gibson guitars and the Mace’s explosive clean headroom, the result was a tone that cut through stadium-sized mixes with authority and sweetness.

In an era when the Marshall Super Lead was praised for its aggression, and the Mesa Boogie offered boutique high-gain refinement, the Mace was a blue-collar monster. Compared to a Fender Twin Reverb, the Mace had a colder, more surgical clean tone—but could hold its own in the volume wars.

Today, the Mace enjoys cult status among tone chasers. Its hybrid design and bizarre built-in phase shifter still intrigue tinkerers, while its brute-force volume and reliability win over old-school road dogs.

Summary

The Peavey Mace is a perfect example of American amplifier engineering that broke the rules. With six 6L6 tubes pushing 160 watts, a transistor-based preamp, and a built-in analog phaser, it dared to be different. Guitarists who plugged in were greeted with staggering headroom, raw tonal clarity, and just enough onboard modulation to inspire sonic adventure.

While its weight may have strained backs and its aesthetics never earned boutique points, the Mace delivered where it mattered: on stage, under pressure, and at full volume.