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Professional Series Dual Channel Amplifier

Meticulously handmade amplifiers.



All available designs for the Professional Series amps respond very well to different guitars/pickups. Even the most aggressive of the channel designs has exceptional articulation and responsiveness.


Key features:

*100W (4x EL34). Can be biased for many different output tube types. Biasing can be done quickly and easily by the user, with a regular volt meter, and without having to open the amplifier. (See bias document for more information.)

*Excellent Master volume controls.

*Effects loop.

*Footswitchable overall Master volume controls (2), as well as footswitchable channel switching (a 2-button footswitch is used).

*Separate Edge and Crunch switches for each channel to help shape each channel’s sound to your tastes.

*Separate EQ for each channel.

*Slave out for driving other poweramps or for DI purposes (when a speaker cabinet simulator is used).

*Measures 29 1/2″ W x 9 3/4″ D x 10 3/8″ H (feet add 3/4″ to the overall height, and the handle is approximately 1/4″ in height)


Options for customizing your Professional Series dual channel amplifier:

Channel designs available for Professional Series dual channel amps

The dual channel amps are built with either of the following general channel configurations:

Overdrive / Overdrive

(Two of the same overdrive design, for instance Firejack / Firejack )

Overdrive / Clean

You can dial in each overdrive channel for “rhythm” or “lead”, or set one channel for “medium gain” and the other for “higher gain”. For each channel there are separate Edge/Crunch/Mode* switches, and separate controls for channel gain, EQ and volume. This setup is very flexible.

*Mode switch is new for Firejack and Body Hammer (not available for the Reptilicus). The Mode switch is not pictured on the amp above, but will be soon.

See the list of designs below.

Provides clean, blues and classic overdrive sounds with the familiar characteristics of many vintage amps while having its own sonic signature. Makes for excellent low-gain crunch sounds with the gain turned up.


This design is based on Vega and Regulus designs combined; it’s the most toneful and flexible “modified Marshall”-sounding design Peters Amplification has made. NOTE: this is LOWER GAIN than Firejack and Body Hammer! This is not generally to be considered a “heavy metal” design to most people. It can be considered a “modified Marshall” sort of sound…but maybe the kind of “modified Marshall” that middle-aged cork-sniffers talk about (and I know a thing or two about this because I am one of them). If you are salivating over the idea of “modified Marshall” imagining “super high gain”, consider the next two designs below instead! They’re what you actually want. But if you want truly old-school stuff, Reptilicus is where it’s at.

While classified as a modern high gain design, the Firejack has a more vintage sound and feel with more shimmer and chime to its sound. It’s a re-inventing of the earliest Gryphon design but with elements of the later Gryphon design (including its specific edge switch functionality). Since the format of the amps have changed internally in several areas as of 2017 (including effects loop and poweramp circuitry), there are other changes in the voicing as well. NOTE: THIS REPLACES THE GRYPHON AND GNL DESIGNS. It can do what they did, but better.

This is the most aggressive and focused modern high gain design made by Peters Amplification to date, and it’s still full of tone. It’s fierce and unapologetic. Prepare to have your face ripped off…and enjoy it. NOTE: THIS REPLACES THE HYDRA, CHIMERA AND FSM DESIGNS. If you’ve heard a clip of those designs and thought “that sounds neat!” you’ll probably consider this to be a superior design in every way.

The name Marshall is only used for general comparative purposes. The name Marshall is trademark Marshall Amplification.

Cosmetic options for Professional Series dual channel amplifiers

Above is my current stock of covering material, used on the amplifier head shells.

Alternately, any of the materials labeled with “tolex” that are in stock at this URL are possible: Tolex supply at NextGen Guitars Canada

Some of the white chassis for the Professional Series dual channel amps, which were used from 2008-2011, are still in stock. These chassis can be used for dual channel models, and are best suited to “overdrive/clean” channel configurations (since “overdrive” and “clean” are written beside the channels).

This white chassis does not have Channel/Master indicator LEDs. (The footswitch for the amp still has LED indicators though.) Instead, it has a power lamp LED.

Due to this chassis’ specific shade of white, if you want white control knobs to go with it, the round “white” or “cream” types are recommended. (The white pointer types have a shade which doesn’t match as well.)

Pictures above show some of the backlighting color options for the Professional Series dual channel and Professional Series triple channel amplifiers.

Choose from: White, amber, red, green, blue, purple.  These colors are available for the backlighting without additional charge.

Choose from: White, yellow, orange, red, green, blue, purple.  All LEDs are the diffused type, and all have the same brightness since I limit the LED brightness to a set amount in the circuit. (None of the LEDs are brighter than the rest, so any of them make for a good choice.)

Choose whatever combination of colors you want for channel indicators and master volume indicators. Some people associate certain colors with certain channels, and others prefer to choose a single color for all indicators (to fit more with a “color theme” for the amp).


Some of the above pictures show triple channel faceplates, and two sizes of knobs. For dual channel amps, only the larger size would be used. (The smaller size knobs aren’t necessary since the spacing of control rows is wider for the dual channel amps.)