The Synergy OS Preamp Module delivers the touch sensitivity, harmonic richness, and dynamic response that made the legendary Dumble Overdrive Special one of the most sought-after amplifiers ever built. Designed for players who value nuance, articulation, and expressive lead tones, the OS captures the essence of the famed circuit in a compact modular format. This is a Synergy preamp module and requires a compatible Synergy amplifier or preamp dock for operation.

Equipped with two footswitchable channels and a pair of 12AX7 preamp tubes, the OS moves seamlessly from articulate cleans to smooth, singing overdrive. Controls for Bass, Mid, Treble, Volume, Master, OD Level, OD Ratio, and Presence provide extensive tonal shaping, while the Bright, Deep, and Rock/Jazz switches allow you to fine-tune the response and character of the module. A three-position Cathode Select switch further tailors the feel and low-end response, giving players additional flexibility to dial in their preferred playing experience.

Whether you're chasing the expressive clean tones favored by players like Robben Ford and Carlos Santana or looking for fluid overdrive that responds directly to your touch, the OS delivers an inspiring playing experience. We especially like this module for players who want exceptional note definition, dynamic control, and a refined overdrive character that stands apart from traditional high-gain designs.

Specifications:

- Type: All-Tube Dual Channel Preamp Module
- Preamp Tubes: 2 x 12AX7
- Channels: 2 Footswitchable Channels
- Controls: Bass, Mid, Treble, Volume, Master, OD Level, OD Ratio, Presence
- Switches: Bright, Deep, Rock/Jazz
- Cathode Select Switch: 3-Position Input Tube Configuration Switch
- Compatibility: Synergy Amplifiers and Preamp Docks
- Dimensions: 5.5" (L) x 7" (W) x 1.5" (H)
- Weight: 1 lb.

Sku: SYN-MOD-SYO