The GENZLER CRASH BOX 4™ Classic Bass Distortion Pedal is the third release in Genzler’s innovative effects line, designed in collaboration with legendary engineer Andy Field. Building on decades of design expertise, this pedal pushes bass tone into bold new territory with raw, gear-grinding distortion.

Where the 4 ON THE FLOOR Overdrive provides smooth, shifting drive textures, the CRASH BOX 4™ is its heavy-handed sibling—delivering aggressive, high-energy distortion reminiscent of vintage “heavy metal” machinery. With dynamic touch sensitivity and powerful harmonic content, it transforms your sound from gritty growl to all-out saturated chaos.

Designed for professional use, the CRASH BOX 4™ combines boutique craftsmanship with road-ready reliability. Whether you’re looking to cut through a dense mix or add heavy character to your tone, this bass distortion pedal gives you the crushing edge you need.

Specifications:

• Power Supply: 9VDC-18VDC (low noise type), either polarity (auto-detecting), 40mA max (Power supply not included).
• Input Impedance: >1M ohm
• Output Impedance: 1k ohm
• Overdrive Engine Input HPF: 30Hz – 200hz
• Overdrive Engine Output LPF: 1kHz – 14kHz
• Input Sensitivity (nominal): -20dBu (high sensitivity), -10dBu (low sensitivity)
• Maximum Input Level: 0dBu (9V supply), +5dBu (12V supply), +10dBu (18V supply), high sensitivity, DRIVE at 9:00
• Maximum Input Level: +5dBu (9V supply), +12dBu (12V supply), +18dBu (18V supply), low sensitivity, DRIVE at 9:00
• Maximum Output Level: +9dBu (9V supply) +14dBu (12V supply), +20dBu (18V supply)
• Dimensions: 5” (127mm) W x 4.1” (104mm )D x 2.3” (59mm)H
• Weight: 1.1 lb (0.5kg)