The Vein-Tap Dark Triad is an overdrive and distortion pedal from UK maker Vein-Tap.com. It is built on the circuit of the original Marshall Guv'nor, with what the maker calls a couple of modern additions, and it covers a wide range of gain: Vein-Tap.com describes it as running "from a pure clean boost to full on metal roar, with sweet blues and massive rock tones in between"1. It sits in the broad territory of overdrive pedals and distortion pedals.
Controls and the clipping switch
The Dark Triad carries independent Bass, Mid and Treble controls, which the maker says "allow you to dial in the perfect EQ balance for your tone"1. Scooping the mids, Vein-Tap.com suggests, takes the pedal "straight to the 80s, for an early Slayer / Metallica tone" in its metal distortion mode1.
The modern addition is a three-position clipping switch. Clipping diodes are what shape a distortion pedal's breakup, and the switch changes their character1:
| Switch position | Clipping type |
|---|---|
| Left | Asymmetrical silicon diode clipping, described by the maker as more open and tube-like1 |
| Center | Clean, with the clipping section removed1 |
| Right | Symmetrical LED clipping1 |
The center position is what makes the pedal usable as a clean boost: with the clipping section out of the circuit, the gain and EQ stages remain. Ben from Vein-Tap.com has also suggested a further use: "You can even use it as a pre-amp to sculpt your tone, perhaps by boosting the mids to cut through a mix"3. That puts it alongside dedicated preamp pedals for players who want tone shaping in front of an amp.
The Marshall Guv'nor circuit behind it
Vein-Tap.com describes the Dark Triad as "Inspired by a classic overdrive circuit (the original Marshall Guv'nor), with a couple of modern additions"1. The Guv'nor has a documented history: MusicRadar's Rob, Reviews Editor for GuitarWorld.com and MusicRadar guitars, called it "a unique circuit that was used by Gary Moore"4. Clone builder GUPtech notes that the Guv'Nor and the Marshall DriveMaster are "almost the same pedal"5, so the topology behind the Dark Triad has close relatives in Marshall's own back catalog.
Size and warranty
The pedal measures 111 × 60 × 38 mm and weighs 0.5 kg1, a standard compact enclosure that sits comfortably on a pedalboard. It is covered by the Vein-Tap.com Lifetime Guarantee1.
Videos
Vein-Tap.com
Vein-Tap.com
Questions
Can the Vein-Tap Dark Triad be used as a clean boost?
Yes. Vein-Tap.com describes the Dark Triad as running from a pure clean boost to full on metal roar, with blues and rock tones in between. The centre position of the clipping switch removes the clipping section entirely, and Ben from Vein-Tap.com has also suggested using the pedal as a pre-amp to sculpt tone, for example by boosting the mids to cut through a mix.
What is the Vein-Tap Dark Triad based on?
Vein-Tap.com says the Dark Triad is inspired by the original Marshall Guv'nor overdrive circuit, with a couple of modern additions. The Guv'nor was used by Gary Moore, according to MusicRadar, and GUPtech notes it is almost the same pedal as the Marshall DriveMaster.
How big is the Vein-Tap Dark Triad?
Vein-Tap.com lists the Dark Triad at 111 x 60 x 38 mm and a weight of 0.5 kg, so it is a compact, standard-sized enclosure that fits a typical pedalboard.
What does the clipping switch do on the Dark Triad?
It is a three-position switch. The left position gives asymmetrical silicon diode clipping, which the maker describes as more open and tube-like. The centre position removes the clipping section for a clean sound. The right position gives symmetrical LED clipping.
What warranty covers the Vein-Tap Dark Triad?
The pedal is covered by the Vein-Tap.com Lifetime Guarantee, according to the maker's product page.
Sources (5)
- Dark Triad Overdrive Distortion Pedal, Vein-Tap.com, 2026-03-07
- Angel of Rock Distortion Pedal, Vein-Tap.com, 2026-03-07
- Using the Dark Triad as a Clean Boost / PreAmp: New Video, Vein-Tap.com, 2016-04-12
- Which is the ultimate Marshall reissue overdrive and distortion pedal to buy?, MusicRadar (www.musicradar.com), 2023-02-27
- Lab Series #14, GUPtech
