Behringer VT911 Vintage Tube Overdrive

The Behringer VT911 Vintage Tube Overdrive is a compact overdrive pedal, an effect type covered in more detail at Overdrive Pedals. What set the VT911 apart from most overdrives was its circuit: it used an actual vacuum tube running at 9V, in a design the circuit-tracing site Guitar FX Layouts described as "quite nice and relatively simple"¹. Tracing the board, the same source found an IC with a pinout matching the TL074, guessed against the original Coolaudio quad opamp, many SMD components, and a Behringer-labeled tube of unknown real brand¹.

What is inside it

The pedal's gain stages are built around a quad opamp IC. When a builder traced the circuit for a DIY reproduction, the IC pinout was found to match the widely available TL074, since little published information exists about the original Coolaudio quad opamp Behringer fitted¹. The original production board used many surface-mount components, and the tube itself carried a Behringer label with no obvious real brand behind it¹.

What players reported

The fullest published account of the pedal in use comes from a builder who reproduced the circuit and reported on it in April 2013¹:

That report describes a pedal that responds strongly to picking dynamics and works best below maximum gain, with the full-gain setting described as a wild ride¹. The same owner, writing about the original pedal, was measured in his verdict:

The 10 euros there is what that owner paid secondhand, not a list price. His summary was that the pedal offered super cheap value for money and sound, but did not stand apart from other overdrives¹.

Where it sits among Behringer's overdrives

The VT911 belongs to Behringer's earlier line of tube-based overdrives, at a time when the company was building pedals around real vacuum tubes rather than only solid-state circuits¹. For other takes on the type, see Distortion Pedals and the Boss SD-1 vs Ibanez TS9 Tube Screamer comparison.

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