Unsupported Browser
The web browser that you are currently using is no longer supported, and as such features of this website may not work as expected. We advise you to update to a currently supported browser (such as Chrome, Edge, or Firefox) to improve your security, speed, and overall experience.
Playing videos requires marketing & advertising cookies. By pressing Play, you consent to their use, which will override previously rejected settings. To update your preferences, see our cookie policy.
We currently have this product in stock and available for dispatch.
Stock Location
| UK Distribution Hub: | 1 |
| Swedish Distribution Hub: | 2 |
| German Distribution Hub: | 2 |
"Get it" shows the next available date that we will be able to deliver this item to you on, depending on the delivery option you select, and the stock availability of anything else that you add to your shopping basket.
5-year warranty & 30-day money-back guarantee included
If you decide your order isn't suitable for any reason you can return it - just let us know within 30 days of receiving it. Please keep hold of all the original packaging until you're sure you want to keep the order.
Eligibility for Money Back Guarantee
Important: For hygiene and software licensing reasons, some items are only eligible for our Money Back Guarantee if they are returned to us unused and sealed in the original packaging with all software still "unregistered." Details of exclusions are shown within the product descriptions. Products include:
- Monitors and Headphones
- Earplugs and Ear Protection
- Reeds and mouthpieces for woodwind and brass instruments
- Mouth and Lip-Care Products
- CDs, DVDs and Software
We can collect your return for a small fee, or you can send it back to us yourself. The collection fee can be found in the returns information on each product's page on Gear4music.
In the unlikely event that any item in this order is faulty, damaged or incorrect on receipt, notify us within 14 days and we'll arrange a free collection.
When returning an order please ensure products are appropriately packaged and protected, to prevent them from getting damaged.
This table provides an overview of your statutory consumer rights, compared with our standard returns policy and optional extended money back guarantee and warranty.
| UK & Europe | EU Standard | Gear4music Standard | Gear4music Optional |
|---|---|---|---|
| Return Period | 14 days | 30 days | up to 180 days |
| Standard delivery charges refunded? | Yes | Yes | Yes, up to 30 days |
| Upgraded delivery charges refunded? | Standard costs only | Standard costs only | Standard costs only |
| Free collection on cancellation | No | No | Yes, up to 30 days |
| Free collection if defective, delivered damaged or incorrect item | Yes, within 14 days | Yes, within 14 days | Yes, within 30 days |
We are unable to accept returns of any custom made items designed to work together as a unique package and some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging. For full information on our returns policy, please refer to our returns and refunds information guide.
Spread your payment with Klarna. No fees.
Shop now. Pay in 30 days with Klarna
Key Features
The Synergy Diezel VH4 Preamp Module is designed for players who want the precision and authority associated with Diezel amplification in a compact format suited to both stage and studio use. It captures the character of the original VH4 through an all-tube design that responds naturally to dynamic playing.
Product Ref: 355011
The module provides two fully featured channels that support detailed adjustment. Each channel includes gain, volume and a complete three band EQ, allowing you to set contrasting sounds without complications.
This structure makes it straightforward to pair articulate rhythm tones with more saturated lead settings. It also encourages careful balancing of output levels so changes between channels feel controlled. Because both channels follow the established VH4 approach to gain structure, the module is able to supply tight crunch or high-gain saturation that retains clarity in complex passages.
The three position Cathode Select switch plays an important role in shaping the feel of the module. It adjusts the bass response of the input stage to mirror combinations used by respected amplifier designers.
Position 2 is preset to Peter Diezel’s preferred configuration which uses a 2.7K resistor and a .68uf capacitor. This option delivers the focused response that many VH4 users rely on. You can select alternative positions to achieve a firmer or looser low-end depending on the demands of your setup. The result is a level of flexibility that supports extended-range instruments and tighter rhythm work without making the controls difficult to manage.
The inclusion of two 12AX7 valves allows the module to respond with the natural compression and dynamic sensitivity expected from the Diezel VH4. Clean passages retain detail while higher gain settings offer smooth saturation that stays articulate.
Because the module was developed with direct involvement from Peter Diezel, it reflects the tonal profile and behaviour of the original amplifier rather than a digital approximation. This focus on authenticity gives players a dependable way to achieve VH4 tones in systems that demand modular flexibility.
The interchangeable Synergy format helps the module fit seamlessly into existing rigs. Installation is straightforward which makes the module suitable for players who adjust their setups frequently or who want to expand their tonal options with minimal disruption.
The VH4's construction supports reliable performance on stage or in the studio. By combining recognisable Diezel characteristics with Synergy practicality, the VH4 Preamp Module provides a clear route to professional high-gain tones in a controlled and adaptable form.
