Welcome to your ultimate bass tone command center. Designed in partnership with Japan’s master of bass tone, Kentaro Nakao, the EarthQuaker Devices® Scrolls® Bass Odyssey is a powerful, modern preamp capable of shaping your organic input signal to match virtually any bass and amp combination imaginable. Whether you want the classic thump of a vintage flip-top amp with a 15" speaker or the aggressive sting of an active bass through a modern solid-state full-stack, Scrolls has you covered.

Built one-at-a-time by the experts at the EarthQuaker Devices Tone Wellness Clinic in Akron, Ohio, this all-analog pedal provides unparalleled control over your overdrive, EQ, and signal routing.

Key Features

• Versatile Tube-Like Drive Section: The right side of the pedal delivers warm, tube-amp-style distortion. Use the Blend knob to retain your clean low-end punch, and the Bandwidth knob to dictate where the clipping is most prevalent—dial counterclockwise for warm, low-end clipping, or clockwise for a focused, high-end crunch.
• Audiophile-Quality Active EQ: The left side offers a full suite of tone-sculpting tools, featuring active Bass, Middle, and Treble controls. The secret weapon is the Variable Frequency (Vari-Freq) control, allowing precise cuts and boosts from 20 Hz to 10 kHz to eliminate mud or add sparkle.
• One-Click Tone Shaping: Three push-button switches provide instant sonic character:
• Deep: 80 Hz boost for massive low-end.
• Process: Low-mid scoop for a modern, articulate sound.
• Bright: 5 kHz boost for extra presence and attack.
• Professional Routing for Stage & Studio: * XLR Direct Out: Balanced output with subtle analog cabinet simulation, perfect for ampless live shows or direct recording interfaces. Includes a Ground Lift.
• Effects Loop: Positioned between the Drive and EQ stages, allowing you to place modulation effects after your dirt but before your final EQ shaping.
• Parallel Out: A buffered, always-active output to send your clean signal to an external amp, DI, or tuner.

Drive Section:

• Level: Master output volume for the Drive channel.
• Blend: Mixes your clean signal with the overdrive.
• Drive: Adjusts the intensity of the distortion.
• Bandwidth: Targets clipping frequency (low-end clipping CCW; high-end clipping CW).
• Tone: Low-pass filter to tame high-end harshness.
• Activated via relay-based, true bypass footswitch.

EQ Section:

• Level: Output volume control for the EQ channel.
• Vari & Vari-Freq: Select a target frequency (20 Hz - 10 kHz) and boost/cut it to taste.
• Treble / Middle / Bass: Active EQ controls with center-detent flat positions. Boost above noon; cut below noon.
• Activated via standard on/off footswitch.

Specifications

• Circuitry: All-Analog
• Bypass: True Bypass (Drive: Relay-based / EQ: Standard)
• Power Requirements: Standard 9V DC (2.1mm negative center)
• Current Draw: 70 mA
• Drive Input/Output Impedance: 500 kΩ / 100 Ω
• EQ Input/Output Impedance: 10 MΩ / 1 kΩ
• Parallel Input/Output Impedance: 10 MΩ / 100 Ω
• Direct Out Impedance: 100 Ω
• Warranty: Lifetime Warranty
• Manufacturing: Hand-built in Akron, Ohio, USA