Power Amplifiers

Our product range is designed for bassists and double bass players who are equipped with:
An analog preamp for electric bass, either tube or transistor-based, such as the Two Notes Le Bass or Revolt, Mark Bass Vintage Pre, Noble Dual Vacuum Tube Preamp, Jule Monique, Tech21 SansAmp (preferably the RBI version), Alembic F1-X, Fender TBP-1, Ampeg SVPCL, Effectrode LA-1A or Blackbird, Baroni (various models), FredAmp (various models), Palmer Pocket Amp, TC Electronic Combo Deluxe 65' Preamp… or even a studio preamp for instruments like the famous Avalon U5 or a TL Audio tube preamp, for example.
A preamp for double bass like the LR Baggs Venue DI or Paracoustic DI, AER Dual Mix 2, Grace Design Felix, Helix or Bix, Vintage Revolution Acoustic Box 2, Schertler Yellow, Fishman Platinum (if your double bass pickup outputs via a jack plug), Radial PZ / JDV, TC-Helicon Play Acoustic, or even the Tech21 QStrip...
A digital multi-effects / modeler like the Neural DSP Quad Cortex, Axe Fx, Line6 Helix or Hx Stomp, Fender Tone Master, Friedman IR-X, Kemper, Strymon Iridium, ToneX, Hotone Ampero II, Mooer M999 Preamp Live, etc...
From a strictly technical point of view, there are two key requirements for a preamp that can properly drive one of the GSS "Sumo" power amplifiers:
At least 20dB of “clean” gain (no saturated sound beyond the first third of the volume knob, like some EBS models, for example)
An output impedance not exceeding 1kΩ
All of our bass power amp products are transistor amplifiers operating in Class D, with power ranging from 100W to 1200W RMS.
The Class D amplification circuits we use are not standard “modules” like Hypex, Ice Power, etc., which are commonly used by most bass amplifier manufacturers today. These are our own creations, designed and developed to deliver a warm yet dynamic sound—very precise but never aggressive. Our goal is to closely emulate the sound of the best tube amplifiers and absolutely avoid the clinical, dull, and cold sound that unfortunately defines the tone of many Class D amplifiers currently available on the market.
Feel free to contact us by clicking the “Any question” button located at the top right of each product page if you have any questions or if you have a specific project to discuss with us. It will be our pleasure to come back with advice and answers as soon as possible.