Rock Master® Preamp Pedal

$199.99

The Peavey® Rock Master® preamp pedal delivers the highly sought-after Ultra Gain tones of the early 90’s Rock Master Guitar Tube Preamp in a compact package small enough to fit in your back pocket. The pedal is now available worldwide through local and online retailers.

The original Rock Master Guitar Tube Preamp is what some consider to be the granddaddy of what became the Peavey XXX and JSX guitar amplifiers. Most notably, the Ultra gain section. The new Rock Master preamp pedal focuses on this Ultra Gain section and the units Voicing EQ. The units PRE and POST gain controls allow the user to control the amount of gain applied to the input signal via the PRE control and the overall output volume via the POST control. The active three band EQ/Voicing section allows players to fine tune their overall tone with BOTTOM, BODY, and EDGE controls. As it implies, the BOTTOM control is an active +/- 15dB shelving type tone control that varies the low frequency boost or cut. The BODY control is an active, peak/notch +/- 15dB tone control that varies the mid frequency boost or cut. And the EDGE is an active +/- shelving type control varying the high frequency boost and cut. Internally, it is Peavey’s TransTube® technology that brings it all together to create that groundbreaking Peavey Rock Master “Ultra” channel circuit.

Construction of the pedal uses a die-cast metal enclosure, fiberglass PCBs with 2-ounce copper and plated through holes on all components, high quality pots, switches, and jacks, and cosmetics reflecting the original preamp that influenced a whole generation of guitar amplifiers. The pedal can be used with either a 9v power supply or battery.

SKU: 03621640
  • TransTube® recreation of the groundbreaking Peavey Rock Master® “Ultra” channel circuit (circa 1990) in a pedal
  • Internal HV TransTube® supply from standard 9V supply/battery
  • Hard Bypass switch with anti-click circuit
  • Pre and Post Gain controls
  • Gain and Mid Shift switches
  • Three-band active Bottom, Body, & Edge EQ
  • Tested and formally approved for worldwide EMC and FCC compliance by an independent laboratory

Channels

Ultra Lead Channel

Impedance

1 Kohm Output

TRS

1/4" Audio I/O

Peavey-Rock-Master-Preamp-Pedal-1.jpg

Rock Master® Preamp Pedal

$199.99

$199.99

Active EQ, Wider Range

Bottom, Body, and Edge controls cut or boost like a pro mixing console, giving you precise tonal control far beyond a standard EQ.

Tube-Era Feel, TransTube® Tech

The Rock Master® Preamp Pedal captures the character of the Ultra channel using Peavey’s TransTube® circuitry engineered to deliver authentic tone and touch from a standard 9V supply.

EQ That Goes Beyond Treble, Mid, Bass

Bottom, Body, and Edge controls give you a broader tonal palette than a standard EQ — precision shaping that matches the original Rock Master® design.

An "Amp in a Box" Pedal

This means it offers everything that an amplifier's preamp section would, including gain controls and EQ for tone shaping.

FAQ

Practically identical. The Rock Master Preamp Pedal is equipped with the same TransTube technology that gave the '90s preamp its punchy, tube-like response. The gain and EQ architecture remains true to the original Rock Master amp's "Ultra" channel.

Yes, the Rock Master Preamp Pedal is essentially an "amp in a box" pedal. This means it offers everything that an amplifier's preamp section would, including gain controls and EQ for tone shaping.

Yes, the Rock Master Preamp Pedal will work with any guitar combo amp or amp head. If your amp has an FX loop, connect the preamp pedal to the input or return for the FX loop to completely bypass the preamp section. You can also plug straight in to the guitar input: set the amp's gain to a clean tone and leave the amp's EQ controls neutral for best results.

No. The Rock Master Preamp Pedal is intended to be used to supercharge the front end of your amplifier, plug into a power amp with speakers, or connect to a speaker emulator. You can also record the output of the preamp pedal and apply IR speaker emulation in your DAW.

Yes, you can use the Rock Master Preamp Pedal to replace a traditional amplifier in performance and recording situations. Keep in mind that you will want to apply speaker emulation in your signal chain for realistic amp tones.

Very well. Power is stepped up to 30 volts internally for high-headroom dynamics, giving you the range you need for punchy clean tones. Adding gain delivers the tenacious and saturated sound of the classic Ultra channel. A Gain footswitch makes it easy to switch between cleaner rhythm tones and searing lead tones.

Preamp Circuit TransTube transistor-based recreation of the circa-1990 Rock Master “Ultra” channel with soft-clipping distortion.

Gain Controls Pre Gain and Post Gain.

Low-Frequency EQ Bottom active shelving control with ±15 dB boost or cut.

Mid-Frequency EQ Body active peak/notch control with ±15 dB boost or cut.

High-Frequency EQ Edge active shelving control with ±15 dB boost or cut.

Gain Switch Boosts overall system gain when engaged.

Mid Shift Switch Selects a higher or lower operating frequency for the Body EQ control.

Bypass Hard bypass with anti-click circuitry.

Output Impedance 1 kΩ.

Power Requirements 9V battery or 9V DC barrel-type, negative-tip power supply.

Compatible Power Supply Peavey #30908180.

Compliance Independently tested and approved for worldwide EMC and FCC compliance.

Rock Master® Preamp Pedal Owner's Manual

If you have questions concerning product operation, support or warranty, please Contact Us!

We can also be reached by phone at 877-732-8391 (toll free in the US).

WARNING: This product can expose you to chemicals, including DEHP, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Find Your Perfect Match

View collection
Peavey-Rock-Master-Preamp-Pedal-1.jpg
Rock Master® Preamp Pedal

$199.99

Bandit® Supreme Teal Stripe Preamp Pedal
Bandit® Supreme Teal Stripe Preamp Pedal

$199.99

Peavey-SessionLTD-400-Preamp-Pedal-1.jpg
Session™‑LTD 400 Preamp Pedal

$199.99

VTM™ Preamp Pedal
VTM™ Preamp Pedal

$199.99

View detail

Best for

High-gain rock, metal and saturated leads

Classic Circuit

Circa-1990 Rock Master “Ultra” channel

Gain & Tone Controls

Pre/Post Gain; Gain boost; Mid Shift; active three-band EQ

Power & Bypass

9V supply/battery; internal 30V; hard bypass with anti-click circuit

Sound Character

Aggressive high gain with tube-like punch

Most Notable Feature

Footswitchable gain boost for added saturation

View detail

Best for

’90s rock, alternative, crunch and leads

Classic Circuit

Circa-1990 Bandit 112/Supreme 160 lead channel

Gain & Tone Controls

SuperSat® and Post gain; Gain boost; Mid Shift; active three-band EQ

Power & Bypass

9V supply/battery; internal 18V; hard bypass with anti-click circuit

Sound Character

Balanced, punchy crunch through saturated distortion

Most Notable Feature

Gain boost and Mid Shift with wide-ranging active EQ

View detail

Best for

Pedal steel and articulate clean guitar

Classic Circuit

Circa-1974 Session/LTD 400 preamp

Gain & Tone Controls

Volume and Sensitivity; three-band EQ; Mid Shift; Presence

Power & Bypass

9V supply/battery; internal 25V; hard bypass with anti-click circuit

Sound Character

Clear, punchy and articulate with high headroom

Most Notable Feature

Classic Session clean tone with internal 25V headroom

View detail

Best for

Players seeking aggressive vintage crunch with extensive response customization

Classic Circuit

Circa-1987 VTM 60/120 preamp

Gain & Tone Controls

Pre/Post Gain; passive three-band EQ; eight response DIP switches

Power & Bypass

9V supply/battery; internal high-voltage TransTube® supply; hard bypass with anti-click circuit

Sound Character

Aggressive, articulate, vintage tube-like crunch

Most Notable Feature

Eight DIP switches for response customization

Artists