GTR Lab ER4/E - Effect pedal





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GTR Lab ER4/E professional power attenuator, excellent condition, tested and working, weighs 1.5 kg, no extras included, designed and built in Italy.
Description from the seller
Excellent and rare professional power attenuator from GTR Lab, model ER4 (with advanced Varislope Power Control components and circuitry). Entirely designed and built in Italy, this device is an essential tool for guitarists who demand the most from their tube amplifiers without compromising neighbor relations or hearing health.
The GTR Lab allows you to push the output tubes of your amplifier (whether head or combo) to the ideal saturation point (the so-called "sweet spot"), achieving that warm, harmonically rich, and naturally compressed tone that only tubes fully driven can offer, while reducing the actual output volume to apartment- or studio-level levels.
Technical Main Features:
- Varislope Power Control: An exclusive technology that corrects the EQ curve as the signal attenuates, preventing the loss of high and low frequencies typical of cheap attenuators.
- Function Selector (Left): Allows you to disable the effect (OFF), set maximum attenuation (MAX), minimum attenuation (MIN), or switch to the customized mode (MID).
- Fine Adj Control (Right): Active in the "MID" position, enables precision, continuous volume adjustment to find the perfect acoustic balance in the room.
- Construction: Sturdy metal chassis with a perforated top grille for excellent passive heat dissipation generated.
GTR Lab attenuation products and systems are a jewel of Made in Italy, appreciated by many professionals and session players in major Italian and European recording studios. Devices of this caliber and with this dynamic management philosophy (Varislope dynamic slope control) draw inspiration from the great historical standards used in mastering studios and by rock legends (such as the historic attenuation and filtering systems used by guitarists like Tom Scholz of Boston or in stadium-scale setups of Pink Floyd) to preserve sustain even at manageable stage volumes.
Practically like NEW, see gallery photos
Seller's Story
Excellent and rare professional power attenuator from GTR Lab, model ER4 (with advanced Varislope Power Control components and circuitry). Entirely designed and built in Italy, this device is an essential tool for guitarists who demand the most from their tube amplifiers without compromising neighbor relations or hearing health.
The GTR Lab allows you to push the output tubes of your amplifier (whether head or combo) to the ideal saturation point (the so-called "sweet spot"), achieving that warm, harmonically rich, and naturally compressed tone that only tubes fully driven can offer, while reducing the actual output volume to apartment- or studio-level levels.
Technical Main Features:
- Varislope Power Control: An exclusive technology that corrects the EQ curve as the signal attenuates, preventing the loss of high and low frequencies typical of cheap attenuators.
- Function Selector (Left): Allows you to disable the effect (OFF), set maximum attenuation (MAX), minimum attenuation (MIN), or switch to the customized mode (MID).
- Fine Adj Control (Right): Active in the "MID" position, enables precision, continuous volume adjustment to find the perfect acoustic balance in the room.
- Construction: Sturdy metal chassis with a perforated top grille for excellent passive heat dissipation generated.
GTR Lab attenuation products and systems are a jewel of Made in Italy, appreciated by many professionals and session players in major Italian and European recording studios. Devices of this caliber and with this dynamic management philosophy (Varislope dynamic slope control) draw inspiration from the great historical standards used in mastering studios and by rock legends (such as the historic attenuation and filtering systems used by guitarists like Tom Scholz of Boston or in stadium-scale setups of Pink Floyd) to preserve sustain even at manageable stage volumes.
Practically like NEW, see gallery photos

