Valeton GP-50

The Valeton GP-50 is a compact, dual-footswitch multi-effects processor and IR loader in pedal format, made by Valeton. It packs more than 100 modeled effects, up to 9 modules in a signal chain, 33 amp models and third-party-style impulse response loading into a metal box roughly the size of a large stompbox, and it runs on a built-in rechargeable battery¹². Valeton positions it as an evolution of the smaller GP-5, promising "more power, more flexibility, and more ways to play"¹.

For a player, that means one small unit can cover compression, drive, amp and cabinet simulation, EQ, modulation and looping, either as a complete rig into a PA or recording interface, or as a set of individual stompbox-style modules on a pedalboard. It lists at $119³.

What the GP-50 does

The GP-50 is a modeling unit: it digitally recreates a catalog of pedals, amps and cabinets rather than using analog circuits for each effect. Valeton says it delivers "more than 100 high-quality effects based on advanced modeling, up to 9 modules in a chain, and flexible routing options"¹. The SnapTone and IR loader functions let you load impulse responses, so the amp and cab simulations can be replaced or supplemented with your own captured cabinet responses¹.

It ships with 55 factory presets and 45 user slots, so you can start from ready-made patches or build your own¹. A 1.77-inch full color screen handles navigation, which Valeton describes as making navigation "crystal clear"¹.

The unit sits in Valeton's GP range between the one-footswitch GP-5 and the larger GP-100, GP-150, GP-180 and GP-200 units. Where the GP-5 puts everything behind a single footswitch and two parameter knobs⁵⁶, the GP-50 adds a second footswitch and expanded connections⁵⁷¹.

The controls and footswitches

The GP-50 uses dual footswitches in a pedal-format enclosure¹. From those footswitches you can switch up to 6 modules on and off, set tempo and sync parameters, and record loops directly from the unit¹. Bass Musician Magazine's Cláudio Ribeiro confirmed in review that "preset changes, effect toggling, and tap tempo can all be handled directly from the unit"⁴.

The top panel controls, as documented by Guitar Pedal X, are²:

The GP-5's single footswitch, by contrast, uses a smart LED ring with user-definable functions in four modes: Preset, Setlist, Stompbox and Tuner/Bypass⁸.

Power, battery and connections

The GP-50 can be powered three ways: a 9V DC center-negative supply, USB 5V, or its built-in rechargeable battery, which has a capacity of 1450 mAh¹⁹. Current consumption is 500 mA on DC 9V or 1A on USB 5V¹.

Connections include a 1/4-inch TS input, dual 1/4-inch TS unbalanced stereo outputs, and additional footswitch and expression pedal inputs¹⁹. It supports expression pedals and external footswitches¹. For MIDI, it supports USB MIDI and has dual 1/8-inch TRS jacks for MIDI input and thru functionality¹. The enclosure is a compact and robust metal casing, 122 x 82 x 54 mm and 430 g¹.

The effect modules: PRE, DST, AMP, CAB and EQ

Guitar Pedal X's overview breaks the effect list down by module, with each model named for the classic it is based on².

PRE module covers compressors, boosts, filters and pitch effects:

• Comp (Ross Compressor) and Comp4 (Keeley C4 4-Knob Compressor)²
• Boost (Xotic EX Booster), Micro Boost (MXR M133 Micro Amp2) and B-Boost (Xotic BB Preamp)²
• Toucher Filter (Touch-Wah), Crier (Wah) and C-Wah (CryBaby Wah)²
• Octa (Polyphonic Octave), Pitch (Polyphonic Pitch-Shifter) and Detune (Detune Effect / Chorus)²
• AC Sim (Acoustic Simulator)²

DST module covers drives and fuzzes: Green OD (TS808), Yellow OD (OD-1), Super OD (SD-1), SM Dist (DS-1), Plustortion (Distortion+), La Charger (MI Audio Crunch Box), Darktale (ProCo Rat), Sora Fuzz (Ge Fuzz Face), Red Haze (Si Fuzz Face) and Bass OD (Bass Drive)².

AMP module includes 33 amp models, running from Tweedy CL (Tweed Deluxe) to Mess Bass BA (MESA/Boogie Bass 400 Amp), plus AC Pre1 and AC Pre2 (AER Colourizer 2 Acoustic Preamp) for acoustic use².

EQ module offers 5-band EQ types: Guitar EQ 1, an alternative Guitar EQ, Bass EQ 1, Bass EQ 2, and Mesa EQ based on the 5-band Mesa Boogie amp EQ².

MOD module includes A-Chorus (Arion SCH-1 Stereo Chorus), B-Chorus, N-Jet (Ibanez Jet Flanger), O-Phase (MXR Phase 90), M-Vibe (Voodoo Lab Micro Vibe), V-Roto (BBD Blue Vibrato VB-2), Vibrato, O-Trem (Demeter TRM-1 Tremulator), Sine Trem and Bias Trem².

The bass-specific models in the AMP, DST and EQ modules mean the unit works for bass players as well as guitarists, a point Bass Musician Magazine made in its review of the GP-50⁴.

Firmware and support

Valeton's current firmware for the GP-50 is V1.1.0, and the support pages include a MIDI list document and an online manual covering that firmware version¹⁰. The manual file on Valeton's site was created and last updated on 26 August 2026¹¹.

What reviewers said

Bass Musician Magazine's Cláudio Ribeiro reviewed the GP-50 and found it delivered solid amp modeling, responsive dynamics, and a wide selection of usable effects, with preset changes, effect toggling, and tap tempo all handled directly from the unit's footswitches⁴. His verdict on the sound:

Guitar Pedal X's Stefan Karlsson, writing when the unit had just reached him, said he had "only just scratched the surface so far" but was "really liking it already"². Pedal of the Day highlighted the unit's small footprint, noting that many multi-effects units are "too big for a neat and tidy pedalboard" while this one packs more options into a package about as small as it can be¹².

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