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Omega Lead

Omega Lead

Solid State Preamplifier

Regular price £129.00 GBP
Regular price £199.00 GBP Sale price £129.00 GBP
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Summer Sale! - All Guitar pedals are 35% off as we clear out stock and make room for new and exciting products.

Based on the Sunn* Beta Lead.

Synonymous with stoner rock and doom metal, the Sunn Beta Lead is one of the most versatile amplifiers ever designed. The unique CMOS distortion circuit generates harmonically rich distortion, which is then shaped by an active EQ circuit with extremely wide range controls. The result is an amp that can go from sparkly clean, to edge of breakup, hard rock and pure fuzz with continuous sweeps of the controls.

* Sunn is a registered trademark of FENDER MUSICAL INSTRUMENTS CORPORATION.

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Product Details - Omega Lead


  • Drive and Gain - These controls set the gain of the CMOS distortion stage. On the original amp, a single, dual-gang potentiometer was used for this control, but we decided to split it into two independent controls for extra versatility. With some many different sounds available, it's impossible to give a description of their behaviour. Experiment and see what you like!
  • Bass, Mid and Treble - 3-band active tone control with a very large +-15dB sweep range. Don't be afraid to visit the extremes, as the circuit drasticaly changes its behaviour at the top and bottom range of motion of these controls.
  • Volume - Controls the output signal amplitude.
  • Tight - Tames the bass frequencies for a slightly grittier but brighter sound.
  • Bass/Lead - Switch between "Beta Lead" and "Beta Bass" mode. A handful of components are switched in and out, but these have a huge impact on the sound, resulting in a bassier, beefier sound (Bass), or a thinner, brigther and more aggressive sound (Lead).
  • Active Switch - Engages or bypasses the pedal with a relay (true bypass).

The original

The Sunn Beta Lead is known for two things. First, its incredible deep bass and fuzzy sound that made it so popular. Second, its ridiculously loud.

Utilizing an integrated circuit chip designed for digital logic circuits, the engineers at Sunn Amplification designed an amplifier based on the concept of abusing a CMOS logic inverter and contorting it into a guitar amplifier. The front panel stated the phrase "Digital C-MOS Technology", and while the chips used to generate the disortion were in fact designed for digital logic circuits, they were being used to process an analog input signal, something they were never intended for.

The result was surprisingly pleasant, and the Beta Lead became one of the most iconic solid state amps ever built. Used by Kurt Cobain and The Melvins, among many others, it has an extremely wide sonic palette. This means that for those unfamiliar with the amp, it can sound straight up awful, if you don't know how to set the controls. Thankfully, it has numerous sweet spots, which range from bluesy edge-of-breakup, to rock and roll, to heavy metal and fuzzy doom.


  • True Bypass with Relay switching.
  • Soft-touch footswitches.
  • Internal voltage-boost mechanism ensures circuit runs at same voltage as the original amp.
  • Aluminium enclosure with durable powder coat finish.

Technical Specs

  • Power Requirement: 9V DC, 180mA
  • Power connector: 2.1mm center-negative barrel jack
  • Dimensions: 155mm (W) 125mm (D) 61mm (H)
  • Dimensions (with packaging): 185mm (W) 130mm (D) 70mm (H)