EarthQuaker Devices Blumes Jr MOSFET Mod Low Signal Shredder Bass Overdrive Pedal

The EarthQuaker Devices Blumes Jr MOSFET Mod is a compact, bass-focused overdrive that takes the beloved Blumes platform and squeezes it into a smaller footprint with a distinctive MOSFET clipping flavour. Voiced specifically for bass, it delivers everything from gritty low-gain growl to full-on high-gain distortion, all while preserving the weight, punch and clarity of your low end.

Built around an all-analogue circuit with internal bipolar power, Blumes Jr offers increased headroom and a more three-dimensional response that feels dynamic and responsive under the fingers. Simple Gain, Tone and Level controls make it quick to dial in, while EarthQuaker’s Flexi-Switch relay-based true bypass gives you both latching and momentary operation for creative on-the-fly stabs and accents.

Bass-Voiced Overdrive with Double the Gain

Blumes Jr is designed from the ground up for bass, with a deeper low-end response that keeps your fundamental intact even at more extreme settings. With double the gain of the original Blumes, it covers a wide spectrum from subtle tube-like warmth to aggressive, saturated drive that can push your amp into serious grind.

All-Analogue Circuit with Internal Bipolar Power

The all-analogue signal path is enhanced by internal bipolar power, increasing headroom and dynamic range so your notes stay articulate and defined. The result is a more open, three-dimensional tone that reacts naturally to your playing, whether you are digging in with a pick or playing softly with your fingers.

MOSFET Clipping for Characterful Drive

The MOSFET clipping modification gives Blumes Jr its own distinct voice, adding a touch of amp-like texture and harmonic richness. It delivers a satisfying crunch at lower gain settings and a tight, focused aggression when pushed, making it equally at home in rock, punk, metal and modern worship contexts.

Compact, Pedalboard-Friendly Design

With its small enclosure and low 25 mA current draw, Blumes Jr is easy to integrate into any bass pedalboard. The Flexi-Switch relay-based true bypass lets you choose between standard latching operation and momentary activation, so you can punch in bursts of drive for fills, accents and transitions without changing your core setup.

• Bass-Focused Overdrive Voice - The circuit is voiced specifically for bass with an extended low-end response, so your fundamental notes stay full and powerful even at higher gain settings. You get drive that enhances your tone rather than thinning it out.
• Double the Gain Range - With twice the gain of the original Blumes platform, Blumes Jr moves effortlessly from mild, crunchy breakup to heavy, saturated distortion. This wide range makes it a versatile choice for everything from subtle grit to full-on low-end shred.
• All-Analogue MOSFET Drive with Increased Headroom - The analogue circuit, MOSFET clipping and internal bipolar power combine to deliver a dynamic, amp-like feel with added clarity and headroom. Your playing nuances come through clearly, whether you are using it as a main drive sound or to push an already driven amp.
• Flexi-Switch Relay-Based True Bypass - EarthQuaker’s Flexi-Switch system offers both latching and momentary operation from the same footswitch, giving you flexible control over how you bring the effect in and out. The relay-based true bypass keeps your dry tone intact when the pedal is off.

General

• Brand: EarthQuaker Devices
• Model: Blumes Jr MOSFET Mod
• Pedal Type: Bass Overdrive
• Drive Type: Tube Screamer Style
• Circuit Type: Analogue
• Instrument: Bass
• Bypass: Relay-Based True Bypass

Controls

• Gain: Adjusts the amount of overdrive
• Tone: More bass to the left, more mids in the middle, more treble to the right
• Level: Sets the overall output volume

Electronics

• Clipping Type: MOSFET
• Input Impedance: 10 MΩ
• Output Impedance: 100 Ω
• Switching: Flexi-Switch relay-based true bypass
• Momentary Switching: Yes
• Latching Switching: Yes
• Mono/Stereo: Mono

Power

• Power Requirement: 9V DC
• Connector: 2.1 mm centre negative
• Current Draw: 25 mA

Dimensions

• Dimensions: 121 x 64 x 57 mm (with knobs)