Authentic angled photograph of Strangebastard on technical papers
Germanium treble booster / SB–01

Strangebastard

A familiar circuit, carefully reconsidered. Handbuilt around selected NOS parts and germanium transistors, voiced by ear.

Explore the apparatus ↓
Mulver Audio / Workshop Series / No. 01 Belgium · Est. 2026
01 / The circuit & controls Technical dossier · SB–01
Technical study / 01

Circuit.

Simple but full of character.

Based on a familiar germanium treble-booster circuit, the Strangebastard uses a carefully selected NOS transistor for a dynamic, touch-sensitive response.

Every component is chosen with care, and each unit is tested and voiced by ear.

Supplied schematic excerpt showing the OC44 transistor stage and surrounding components; the complete circuit is not shown
Circuit detail · supplied excerpt
Fig. 01 / Front view
Original real front photograph of the blue Strangebastard pedal on vintage electronic reference paper
SB–01 / Rev A
The apparatus / 02

Controls.

Original Input Trim illustration from the Mulver manual

Input Trim

Fine-tunes the pedal to match your guitar and amplifier.

Lower: brighter, more headroom · Higher: fuller, more saturation
Original Gain knob illustration from the Mulver manual

Gain

Controls the output level feeding your amplifier.

Centre: classic booster output · Higher: more sustain and drive
Original Range switch diagram from the Mulver manual

Range

Full Range: open and dynamic.
Classic: pronounced upper mids.
Focused Lead: a tighter attack.

View original manual ↗
Real photographed detail of oxblood-red knob and vintage Mulver graphics
02 / Oxblood / Detail
Workshop / Details

Details.

Selected vintage components. A hammered-blue enclosure. A frontplate designed with the same care as the circuit behind it.

Transistor Selected NOS germanium / OC44
Range Three voicings
Finish Hammered Blue
Assembly Handbuilt / Belgium
Real close crop showing the hammered-blue Strangebastard enclosure and faceplate
03 / Surface & finish
02 / At the workbench

Inside.

Point to point. Selected components.

Carefully selected components, handwired and assembled one pedal at a time. Each unit is built, tested and voiced in the Mulver Audio workshop.

View the original manual ↗
Original workshop photo showing the actual Strangebastard inside, electronic components, OC44 transistor, and handwired construction
Fig. 04 / Original workshop photograph
Strangebastard / photographic study
OPEN ORIGINAL ↗
Mulver Audio / Belgium

Interested in a
Strangebastard?

Availability and build enquiries are welcome.

Ask about this pedal ↗