The GR Bass Groovy is a tube bass preamp in pedal form. GR Bass describes it as featuring a 4-band EQ, a dual drive and distortion section, and dual balanced DI outputs, and says it delivers "everything from clean flat tones to warm vintage and aggressive modern sounds in a compact and versatile" format1. It sits among preamp pedals, with the drive side touching overdrive and distortion territory.
What it does
GR Bass positions the Groovy as more than a one-job pedal. According to the maker, it "can be used as a complete preamp, professional tube D.I. box, recording tool, or tone-shaping pedal for both live" and studio use1. In practice that means it can sit at the front end of a rig as the preamp itself, feed a front-of-house desk or audio interface through its balanced DI outputs, or simply shape tone as a drive and EQ pedal on a board.
The 4-band EQ gives players four bands of tone control rather than the three typical of many bass preamps, and the dual drive and distortion section provides two drive voices to shape, from light grit to heavier distortion1.
Power and practicalities
The Groovy runs on 12V DC and draws 500mA, and GR Bass states that the power supply is not included1. That voltage and current draw matter on a pedalboard: a standard 9V supply will not do, and a daisy-chain output rated well below 500mA will not run it either. Plan for a dedicated 12V output on an isolated supply.
The Groovy needs 12V DC at 500mA, and no power supply is included with the pedal1.
GR Bass also notes that its "products are assembled manually and may differ slightly in aesthetics, weights and sizes," adding that "the differences are minimal"1. So an individual unit may vary slightly from the listed dimensions of W16 x D11.5 x H6 cm1.
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Questions
Does the GR Bass Groovy come with a power supply?
No. GR Bass specifies the Groovy at 12V DC and 500mA, and the maker's product page states that the power supply is not included. You will need a 12V DC supply that can deliver at least 500mA, which rules out most standard 9V pedal supplies and many daisy-chain outputs.
Does the GR Bass Groovy have a DI output?
Yes. The Groovy has dual balanced DI outputs. GR Bass describes the pedal as usable as a complete preamp, a professional tube DI box, a recording tool, or a tone-shaping pedal for live and studio work.
Is the GR Bass Groovy a real tube preamp?
Yes. GR Bass describes the Groovy as a tube bass preamp, built in pedal form. The maker positions it as a complete preamp, a professional tube DI box, a recording tool, or a tone-shaping pedal for both live and recording use.
How much does the GR Bass Groovy weigh?
GR Bass lists the Groovy at 0.4 kg, or 0.88 lbs. The maker notes that its products are assembled manually and may differ slightly in aesthetics, weights and sizes, though it says the differences are minimal.
Who makes the GR Bass Groovy?
The Groovy is made by GR Bass, an Italian bass gear maker. The pedal is designed around what the company calls the GR Bass philosophy, delivering everything from clean flat tones to warm vintage and aggressive modern sounds.
Sources (1)
- GROOVY - GRBass, GRBass, 2026