The GUPtech T-Bag Douche Edition is a two-in-one JFET preamp pedal from the Canadian builder GUPtech, tweaked around the Sunn Model T amp. GUPtech describes it as "a pretty violent tribute to the great T", a nod to the vintage head whose character the circuit chases. A JFET preamp uses junction field-effect transistors to shape gain and EQ in a way builders favor for capturing the response of an amp's front end, and the two-in-one layout means the pedal carries two channels in one box. It sits among preamp pedals rather than conventional overdrive pedals, though the territory overlaps.1
Controls and switching
The pedal keeps its control set simple. GUPtech lists a full 3-band EQ for bass, middle and treble shaping, plus one master Volume (Vol.) knob. Channel selection is handled on foot: the right footswitch is the foot-switchable channel control, so the two channels can be swapped while playing.1
| Control | Function |
|---|---|
| 3-band EQ | Full bass, middle and treble equalization1 |
| Vol. | One master volume1 |
| Right footswitch | Foot-switchable channel selection1 |
Power
The T-Bag Douche Edition runs on 9V DC center negative and draws 4mA. That is a light current draw, so it fits comfortably on a standard pedalboard supply alongside other pedals.1
Where it comes from
GUPtech builds all of its pedals in Saguenay, Québec, Canada, and the T-Bag Douche Edition is made there. The Douche Edition is one of several JFET preamps in the company's range; the PorCorn Douche Edition applies the same Douche treatment to a circuit based on a different amp. The Sunn Model T itself is remembered as "the legendary amp of the same name" in coverage of Model T-inspired circuits.2
GUPtech lists the T-Bag Douche Edition as sold out. The standard GUPtech T-Bag is a separate product.
What reviewers and players say
Published coverage of this specific edition is thin; the pedal's own description, "a pretty violent tribute to the great T", is the maker's characterization of its sound rather than a reviewer's verdict.1
Questions
What amp is the GUPtech T-Bag Douche Edition based on?
GUPtech describes the T-Bag Douche Edition as tweaked around the Sunn Model T amp, the vintage head the pedal takes its inspiration from. The company calls it a pretty violent tribute to the great T, and the circuit uses JFETs, the same transistor type many preamp pedals use to imitate the feel of a tube amp's front end.
What power does the T-Bag Douche Edition need?
The T-Bag Douche Edition runs on 9V DC center negative and draws 4mA, a very light load by pedal standards. That low draw means it can share a standard pedalboard power supply with other pedals without straining the supply's available current.
Where is the GUPtech T-Bag made?
GUPtech builds all of its pedals in Saguenay, Québec, Canada, and the T-Bag Douche Edition is made there as well. The company is a small Canadian builder whose range includes other JFET preamps such as the PorCorn Douche Edition.
Is the T-Bag Douche Edition sold out?
Yes. GUPtech's product page for the T-Bag Douche Edition lists it as sold out as of late October 2026. The standard T-Bag remains a separate product in the company's lineup.
How do you switch channels on the T-Bag?
Channel switching is done with the right footswitch. GUPtech lists the pedal as foot switchable channel on the right footswitch, so the two-in-one preamp's channels can be changed from the board while playing, without reaching down to turn a knob.
Sources (2)
- GUPtech T-Bag, GUPtech (guptech.ca)
- Kenny B Pedals Sunn Model T Overdrive, Pedal of the Day, 2019-05-25
