Mooer GE300

The Mooer GE300 is a multi-effects floorboard from Mooer, described by the maker as its flagship multi-effect instrument processor¹. It arrived from official Mooer dealers and distributors worldwide on June 4, 2019², and it packs amp modeling, a full effects chain, cab simulation, a looper, a drum machine-style workflow and a three-voice synth engine into one pedalboard-sized unit. At launch it was positioned squarely against the Line 6 Helix LT and the HeadRush Pedalboard³, and GearNews called it "a lower-priced equivalent to the Line 6 Helix pedalboard" on paper⁴.

Under the hood it is built around two Sharc DSP chips and an NXP crossover processor⁵, which Mooer says deliver "the fastidious detailed characterizes of every delay, reverb, modulation or amp model"¹.

What it does: amp models, effects and a synth engine

The GE300 carries 108 amp models and 164 effects⁶. Guitar.com's review noted that the majority of the amp models are based on Mooer's successful Micro Preamp series⁷, so players who know those small preamp pedals will recognize much of the amp lineup. MusicRadar's Alex Lynham found "a decent cross-section of classic amps, from Fender tones, to Marshall, to modern US-style, which are actually pretty impressive," and summed up the unit's strengths as "great amp and effects tones"⁹.

The synth engine is the feature that set the GE300 apart from most floor multi-effects at launch. It has three independent voices, each with its own parameters for waveform, pitch, attack, level, filter and arpeggiator¹. Mooer's launch material emphasized how deep the editing goes:

Mooer launch press release²

The unit also includes 43 optional factory cab sims³, and firmware updates have kept the effects list growing: V3.0.1 added an Intelligent Harmony effect to the FXA module, and V4.0.1 added four new overdrive and distortion models to the DS/OD module: ROD881, RED AT, ODR1 and BE OD¹⁰.

Tone Capture: amp, guitar and cab modes

Tone Capture debuted on Mooer's Preamp Live in 2018 and returns in the GE300 with three modes⁵:

Amp Mode lets you profile your own amplifier so the GE300 can reproduce it; Cab Mode is an all-in-one way to make impulse responses from a cab you own; Guitar Mode captures how your particular guitar shapes the signal¹¹. For players who already own an amp they love, it is a way to carry that amp to a gig without bringing it.

The controls and footswitches

The GE300 uses programmable footswitches with user-selectable LED colors and assignable functions, which Mooer says allows complete user customization¹. Firmware V2.0.6 added a third footswitch control mode: in FS mode 3, from the bank select page, you can access eight preset patches via A, B, C, D and CTRL1 through CTRL4¹⁰.

A large color LCD display handles editing and preset navigation⁴, and the rear panel is fully stocked for a floor unit⁷:

• Mini-jack auxiliary input for media playback
• EXP2 jack for an external expression pedal, also usable as an external switching output
• Switchable guitar/line level input
• Stereo send and return (effects loop)
• Stereo jack outputs and stereo XLR out with ground lift
• 1/4-inch headphone output
• MIDI In and MIDI Out/Thru with easy mapping and external control switching for other pedals and amps
• USB and a DC input for the mains power brick

Firmware updates and NAM support

Mooer has kept the GE300 current with a long run of firmware updates, and the recent ones matter to players using modern amp capture tools: firmware V5.1.3 added support for loading Neural Amp Modeler (NAM) A1 models, and V5.1.4 added support for converting and loading NAM A2 models, expanding compatibility with NAM-based amp tones¹⁰.

• V2.0.6: In FS mode 3, from the bank select page, you can access 8 preset patches via A, B, C, D and CTRL1, CTRL2, CTRL3, CTRL4¹⁰
• V3.0.1: Added the Intelligent Harmony effect to the FXA module¹⁰
• V4.0.1: Added the ROD881, RED AT, ODR1 and BE OD overdrive/distortion models¹⁰
• V5.1.3: Added support for loading Neural Amp Modeler (NAM) A1 models, expanding the tone model library¹⁰
• V5.1.4: Added support for converting and loading NAM A2 models, expanding compatibility with NAM-based amp tones¹⁰

NAM model files can only be imported into the AMP module, so they take the place of a factory amp model rather than running alongside one. The companion GE300 Lite received matching NAM support in its V5.0.3 firmware, and its V5.0.2 update added dual third-party IR loading with independent or blended left and right channels in the Cab Module¹².

The GE300 Lite and where the GE300 sits

In 2020 Mooer downsized its flagship with the GE300 Lite, a pared-down, more compact version¹³¹⁴¹⁵. The Lite drops the onboard volume and expression pedal and two footswitches¹⁴, keeps MIDI In/Out¹⁶, and launched at a price a little below the Line 6 Helix and Helix LT, cheaper than the Boss GT-1000 and close to the Line 6 POD Go¹⁶. It was announced shortly after the GE150 and GE250 arrived at the end of 2019¹⁷.

Within Mooer's own range, the GE300 sits above the GE200, an all-in-one amp and cab modeler, effects processor, drum machine and looper that MusicRadar's 2026 guide still names the best budget multi-effects pedal¹⁸¹. At launch the GE300 was priced at £745 in the UK⁷ and EUR 749 RRP in Europe⁴, with the US price still to be confirmed at the time⁷⁴¹⁹.

MusicRadar's review team found the GE300 "with a smaller footprint than its rivals and rock-solid build quality"⁸, and Guitar.com named it among its best multi-effects pedals of 2019⁸.

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