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GUP Tech VeJ4
Photo: GUPTech

GUP Tech VeJ4

Distortion
Key facts
TypeAmp in a box distortion1
MakerGUP Tech, made in Saguenay, Québec, Canada1
CollectionVeJ collection1
Enclosure colorRed1
Power9Vdc center negative1
Current draw11mA1
List price£77.00 GBP (as listed by the maker, 26 October 2026)1

The GUP Tech VeJ4 is an amp-in-a-box distortion pedal: a single stompbox built to bring the feel of a full amp to a pedalboard. GUP Tech describes it as a pedal that "brings a complete amp feeling to your pedalboard," with three drive modes, a full EQ and very low noise, and the maker goes as far as calling it "a must have preamp for all pedalboards"1. It is part of the VeJ collection, a family of amp-in-a-box preamp and drive pedals that also includes the VeJ3 and the VeJ3 Eggplant Douche Edition1.

The three modes

The VeJ4 carries three drive modes, selected on the pedal, each aimed at a different amount of gain1:

  • 0 - Classic Blues Tone: the lowest-gain setting, aimed at blues voicings
  • 1 - Distortion: the pedal's core distortion mode
  • 2 - Thick Distortion Channel: the heaviest of the three, a thicker take on the distortion voice

That spread means one box covers everything from a bluesy edge to a thick high-gain channel, which is the usual appeal of the amp-in-a-box idea: instead of stacking separate overdrive and distortion pedals, one pedal models the gain structure of an amp from clean-ish to heavy.

Where the VeJ4 sits in the VeJ collection

The VeJ series is GUP Tech's line of amp-in-a-box preamps and drives, and the maker positions the VeJ4 at the hot end of it. On the product page, GUP Tech says the VeJ4 "is a little more violent than our VeJ2 (Broccoli) and VeJ3 (Eggplant)"1. The VeJ3 Eggplant Douche Edition page confirms the ordering from the other side, describing that pedal as "just between the VeJ2 and VeJ4" in the series2.

The neighbors differ in type as well as gain. The VeJ2 Douche Edition is an amp-in-a-box preamp-overdrive whose three modes run from a full range boost through tight distortion to a fat distortion channel3, while the VeJ3 is an amp-in-a-box preamp-distortion with a full EQ and very low noise, sold in Magenta and Army Green color options4. The VeJ4 takes the same amp-in-a-box approach with a full EQ and low noise, but leans further into distortion territory than either1.

Using it on a board or in a loop

Because GUP Tech frames the VeJ4 as a preamp as much as a distortion, it is built to work in two places. The maker says it "sounds great on a clean channel or directly in the FX Loop return of a tube amp"1. On a clean channel it behaves like a drive pedal in front of the amp; plugged into an FX loop return, it takes over the amp's preamp stage, which is the classic amp-in-a-box use. The full EQ gives tone shaping either way, and the maker's emphasis on very low noise matters for players running it as a preamp, where any hiss sits right at the front of the amp's signal path1.

Power is straightforward: 9Vdc center negative, the standard for pedalboard supplies, drawing 11mA1. That is a light load, comparable to the VeJ2 Douche Edition's 12mA3, so it fits easily alongside other pedals on a typical multi-output supply.

The VeJ4's listed price is given by the maker in British pounds, £77.00 GBP, even though GUP Tech is a Canadian builder1.

What buyers report

The VeJ4's product page shows 6 reviews, all five-star: 6 positive and 0 negative1. That is a small sample from the maker's own site, so it says the early buyers who reviewed it were uniformly satisfied, not how the pedal compares broadly.

Videos

GUP Tech VeJ4 - Tomato - Distortion High Gain Preamp
GUPtech
GUPtech VeJ4 Distortion
Matt Foy
GUP Tech Vej-4 and DCD Preamp/Distortion pedals
GUPtech

Questions

What power supply does the GUP Tech VeJ4 need?

The VeJ4 runs on a 9Vdc center negative supply, the standard arrangement for most pedalboard power supplies and one-spot style adapters. GUP Tech lists this on the product page, so any regulated 9V center negative output will suit it. As with any pedal, use an isolated or properly rated supply rather than an unregulated adapter.

How much current does the GUP Tech VeJ4 draw?

GUP Tech lists the VeJ4's power consumption at 11mA. That is a light draw by pedal standards, well within what a single output of a typical pedalboard power supply provides, and it leaves plenty of headroom on a shared or daisy-chained supply alongside other low-draw pedals.

How does the VeJ4 differ from the VeJ2 and VeJ3?

GUP Tech describes the VeJ4 as a little more violent than its VeJ2 (Broccoli) and VeJ3 (Eggplant) siblings. The VeJ2 is an amp-in-a-box preamp-overdrive with modes including a full range boost, tight distortion and a fat distortion channel, while the VeJ3 is a preamp-distortion. The VeJ4 is the distortion-leaning step up in that lineup.

Can the VeJ4 go in the effects loop of a tube amp?

Yes. GUP Tech says the VeJ4 sounds great on a clean channel or directly in the FX Loop return of a tube amp, and describes it as a preamp for pedalboards with a full EQ and very low noise. Running it into the loop's return lets it act as the amp's preamp section.

Sources (4)
  1. VeJ4 - Distortion, GUP Tech (guptech.ca)
  2. VeJ3 - Eggplant Douche Edition, GUP Tech
  3. Vej2 - Douche Edition, GUP Tech
  4. VeJ3 - Eggplant Distortion, GUP Tech (guptech.ca)

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