Diezel VH4 Overdrive/Preamp Pedal

Retailing in the region of £219.00

On the menu for January 2026 are the Guitar Pedals, freshly added and carefully selected. These New units are available to order online with fast, secure delivery from trusted UK retailers. Read on for full details, specifications, demos, videos, reviews, and the best places to buy the Guitar Pedals today.


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On the menu for January 2026 are the Guitar Pedals, freshly added and carefully selected. These New units are available to order online with fast, secure delivery from trusted UK retailers. Read on for full details, specifications, demos, videos, reviews, and the best places to buy the Guitar Pedals today.

The Diezel VH4 is one of the most loved high gain metal amps in the world. It’s four channel design has found its way in to studios around the world becoming a go to amp for a lot of metal bands. Now the incredibly powerful channel three from the VH4 is not available in this single pedal that can either go straight in to the front of your amp or in to the power amp section acting as a standalone preamp.

So Much Power

While the VH4 does indeed have a fourth even heavier channel than the third channel this pedal is based on it has all of the gain you will ever need. Turned down low this pedal goes from a saturated mid gain sound all the way up to screaming solo heaven that only gets better when matched up with a classic green boost pedal.

VH4 Control Scheme

With some amp style overdrive pedals they often miss off a lot of the controls that give that pedal character. The VH4 does not with a full 3 band EQ like you find in the preamp section on top of the Deep and Presence controls that are normally part of the power amp section. These are part of what made up the signature Diezel sound so it only makes sense that they are here on this pedal.

Preamp or Overdrive Pedal?

Here’s what Diezel say

Because this pedal is made in a very similar way to the original preamp in the actual amp it can be used as either an overdrive pedal or as a preamp to feed in to your amps power section. The benefit here is that by going direct in to the power amp you get all of the great Diezel tone uncoloured by your own amplifiers clean channel.

When musical architect Peter Diezel created the DIEZEL VH4 in 1994 he unknowingly sparked a revolution in tone, creating such a demand that he literally had no choice but to put his own personal creation into production. More than 20 years later, the VH4 has become one of the most loved high gain mps in the world and the powerhouse that put DIEZEL at the forefront of music with some of the most iconic players (from Metallica to Guns N Roses) performing with it on some of the biggest stages and in studios around the world. For the first time ever, this powerful performance tool can be found in the new DIEZEL VH4 PREAMP PEDAL with all the lush, dynamic overdrive character of the VH4 Channel 3.

Unlike traditional overdrive stomp boxes, the VH4 Pedal is a true preamp which delivers an authentic representation of its namesake – real Diezel tone – not emulated, not modeled, but sincerely reproduced. The entire signal architecture is faithful to the original: Bass, Mid, Treble and variable Deep and Presence controls allow you to tailor the uniquely Diezel Overdrive character. The command found in the Gain control gives a player everything they will ever need with lower gain settings producing the classic Diezel sparkle and chime to saturated mid-gain sounds, to scorching Diezel leads by cranking it all the way up.

As close to the original VH4 preamp, the VH4 pedal can be used as either an overdrive or as a standalone preamp to feed into your amps power section. What players take away by going direct into the power amp is all the dynamic, unfiltered Diezel tone by simply plugging into your amplifiers clean channel. Two outputs are provided with the first intended to connect to the front of a guitar amplifier and the second allows for a connection to a line-level power amp or power section of your amp via the Effects Return.

Specifications

  • Preamp pedal based on the legendary VH4 Channel 3 
  • Controls: Volume, Gain, Bass, Middle, Treble, Presence and Depth
  • Pedal be powered between 12-18VDC (no battery)
  • 12V power supply included
  • 18V power supply cable included (for use with 9V isolated power supplies)
  • Assembled in USA

 

Additional information

Weight 1 kg

Category

Guitar Pedals

Tags

Boost

EQ

While Ed Sheeran primarily relies on the natural sound of his acoustic guitar and vocals, he occasionally uses EQ (Equalization) to shape and enhance his tone during live performances or in the studio. EQ pedals or onboard preamps can allow him to adjust the frequency response of his guitar signal to suit the acoustics of different venues or to achieve specific tonal characteristics. Here’s how EQ might be utilized in Ed Sheeran’s setup:

1. **Tonal Shaping**: EQ can be used to adjust the balance of frequencies in the guitar signal, allowing Ed Sheeran to shape his tone to his liking. For example, he might boost the midrange frequencies to bring out the warmth and presence of his acoustic guitar, or cut certain frequencies to reduce any harshness or mud in the sound.

2. **Feedback Control**: In a live setting, EQ can help control feedback by notching out problematic frequencies that might cause the guitar signal to feed back through the amplification system. This can be particularly useful when performing in venues with challenging acoustics or high volume levels.

3. **Room Correction**: In situations where the venue’s acoustics are less than ideal, EQ can be used to compensate for any deficiencies in the sound. By adjusting the EQ settings, Ed Sheeran can tailor the guitar tone to sound more balanced and natural, regardless of the room’s acoustic properties.

4. **Matching Gear**: EQ can also be used to match the tone of Ed Sheeran’s guitar to the sound of other instruments or equipment in his setup. For example, he might adjust the EQ to complement the tonal characteristics of his vocal microphone or to blend seamlessly with backing tracks or other instruments.

Overall, while EQ may not be a central component of Ed Sheeran’s guitar effects setup, it can still play a valuable role in shaping his tone and ensuring that he achieves the desired sound in different performance environments. Whether used subtly for tonal shaping or more aggressively for feedback control, EQ allows Ed Sheeran to tailor his guitar tone to suit his musical vision and performance needs.

New

This is brand new, fresh in, and a UK warranty is included. New Gear always comes from trusted UK music retailers.

Overdrive

Like a golden layer of melted cheese — warm, gooey, and just put it all over. It adds just the right amount of richness and grit, turning a clean signal into something smooth and savoury. Designed to mimic the natural breakup of a tube amp pushed to its sweet spot, overdrive delivers the flavour of classic rock and blues in every bite. From creamy mid-gain warmth to crisp edge-of-breakup sparkle, it’s the comfort food of guitar tone — simple, satisfying, and endlessly versatile. Whether it’s a mild crunch or a full-bodied roar, overdrive is where good taste begins.

Preamp

A preamp pedal shapes and boosts your guitar’s signal before it reaches your amp or recording interface, giving you control over tone, gain, and headroom. It acts as the first stage of amplification, adding warmth, clarity, and character while preparing your signal for the next part of the chain. Some preamps emulate the response of classic valve circuits, while others offer clean, transparent tone shaping ideal for acoustic instruments or direct recording setups.

Used on its own, a preamp pedal can serve as the foundation of your tone, providing a consistent core sound wherever you play. When combined with other effects, it enhances dynamics and helps each pedal sound more defined and natural. Whether you’re looking to push your amp harder, bring life to a dull signal, or refine your sound for the studio, a good preamp pedal adds presence, punch, and musicality to any rig.

used

Volume

Volume pedals control the output level of a guitar signal using a foot-operated treadle. They allow smooth volume swells, dynamic control during playing, and easy muting between songs. Volume pedals can be placed at different points in the signal chain to either control overall loudness or adjust gain and drive behaviour when positioned before distortion or overdrive pedals.

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