DSM & Humboldt Bass Master Zero Watt Amplifier

A versatile preamp pedal for the modern bassist

The Simplifier Bass Master from DSM & Humboldt is a compact yet powerful preamp pedal designed specifically for electric bass. It combines classic tonal foundations with modern flexibility, making it equally suited for stage, studio, or a home pedalboard setup.

The pedal features three distinctive preamp modes – Clean, Comp, and Hot – covering a wide range of bass tones, from transparent and articulate to warm and driven. A parallel signal path, adjustable with onboard EQ and filters, offers further control and allows you to blend clean and processed signals without sacrificing low-end or clarity.

Bass Master also includes realistic cabinet simulations, dual DI outputs, flexible FX loops, and a headphone out – all packed into a rugged format optimized for today’s mobile and digital workflows. Whether you're gigging without an amp or building a complete rig in pedal form, the Bass Master provides a reliable foundation for your sound.

Everything you need to go directly into an FOH (Front of house) or recording mixer
Versatile pre-amp with three modes (Clean, Comp, Hot), Gain, Level and a four-band EQ
Parallel signal routing with selectable LPF (500 Hz, Off, 100 Hz)
Dual FX Loop (with Pre-Fx Loop and Main-Fx Loop) and a cabinet simulation with three voicings: 8x 10" 1 x 15" & 4x 10" with type selection and resonance controls

LED: On
Input: 6.3 mm jack
Main output: 6.3 mm jack
Parallel output: 6.3 mm jack
DI parallel: XLR
DI main: XLR
Pre FX Send & Return: Two 6.3 mm jacks
Post FX Send & Return: Two 6.3 mm jacks
Aux input: 3.5 mm stereo jack
Headphones: 3.5 mm stereo jack
Power supply connector: Barrel connector 5.5 x 2.1 mm, centre negative
Power consumption: 100 mA
Power supply with a 9 - 12 V DC power adapter (not included, suitable power supply: Art. 409939)
Dimensions (W x D x H): 115 x 65 x 55 mm
Weight: 430 g
Made in Chile
Controls:

Preamp: Gain (Comp), Preamp Level
Parallel: Main Mix
Cab: Master Level, Porting, Tweeter
Equalization: Low, Low Mid, High Mid
Phones level
Switches:

Preamp Drive Mode (Clean, Comp, Hot)
Parallel LPF: 500 / Off / 100 Hz
Pre FX Assign (Drv, Both, Parallel)
Cab size: Four 10" / eight 10" / one 15"
Speaker Colour: Warm / Bright / Modern
Out Main (Main / Cab / Bypass)
Out Parallel (Parallel/Thru)
Parallel Phase
Ground lift