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Professional Series Triple Channel Amplifier

Meticulously handmade amplifiers with amazing tone.


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 3-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 triple channel amplifier:

Channel designs available for Professional Series triple channel amps

Your triple channel amp will be built with this general channel configurations:

Overdrive / Overdrive / Clean
Two of the same overdrive channel you choose, for instance Firejack / Firejack, plus a Clean channel. Each overdrive channel’s individual row of controls allows for a wide variety of flexibility in its settings so you can contrast the two channels for different yet complementary overdrive sounds. You can dial in the two channels to be rhythm/lead (or crunch/high gain, etc.)

Mixing different overdrive designs in a configuration is not possible. The information above outlines the limits of the configurations.

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.

-OVERDRIVE designs-

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. The new Mode switch adds another layer to the Firejack, providing a more old-school vibe with lots of gain, among other things suitable for sounds that rhyme with “Band Wailin”. NOTE: THIS REPLACES THE GRYPHON AND GNL DESIGNS. It can do what they did, and more.

This design is the middle ground between the Firejack and Body Hammer designs, with characteristics of both designs. It’s a “more modern” sounding version of the Firejack, with the more modern aspects of the sound/response based on some of the Body Hammer design. This design is a good replacement for the FSM (which was discontinued).

This is the most aggressive and focused modern high gain design made by Peters Amplification to date, and it’s still versatile and full of tone. 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. The new Mode switch brings an old-school voicing to the channel, gnarly and raw, great for thrash and heavy rock.

NOTE: The Hydra was never intended for the tightest and most aggressive metal sounds! The BODY HAMMER is specifically designed to do this! I get asked about this a lot because one guy made a Youtube recording in which his Hydra sounded aggressive enough, but it isn’t that way normally. He used unusual speakers, biased the amp colder, ran it with a 4×12 plus a 2×15 powered sub cabinet, and the clip was recorded by an iPhone in the room. If I thought the Hydra would make people happy for the kind of thing they expect based on this clip, I wouldn’t have DISCONTINUED IT and REPLACED IT WITH A SUPERIOR DESIGN FOR THAT SPECIFIC GOAL. Most people misunderstood what the Hydra was intended for, so I was forced to discontinue it. I can make the Hydra any time I want, but I purposely chose to discontinue it. Think about that for a minute. 🙂 Thanks!

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

Cosmetic options for Professional Series triple 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

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).