The Carl Martin Quattro combines four independent, fully analog effects into a single unit: a Compressor/Limiter, a two-channel Overdrive, a Vintage Chorus, and an Echo. Designed for an open, dynamic, and transparent sound that preserves your amplifier’s character, it features dedicated controls and footswitches for each section to allow instant, menu-free operation during performances. The unit includes a built-in effects loop positioned between the overdrive and chorus sections for flexible external pedal integration, and utilizes an internal, regulated ±12V power supply to ensure high headroom, low noise, and premium component performance.

When the Carl Martin team designed Quattro, the goal was straightforward: bring four of their most used, performance-ready effects together in one unit — without losing feel, headroom, or clarity. Instead of digital modeling or layered menus, they focused on real circuits, immediate control, and a signal path that behaves like a proper pedalboard.

Quattro is built around four independent analog sections: Compressor, Overdrive, Chorus, and Echo. Each effect has its own dedicated controls and footswitch, allowing the design team to engage or bypass sections instantly during a performance — no scrolling, no presets, just play.

The signal starts with the Compressor/Limiter circuit, offering controlled dynamics and level balancing without squashing the tone. From there, the two-channel Overdrive provides both crunch and high-gain stages, selectable on the fly. The voicing stays tight and articulate, with a tone control that works as a low-pass filter to keep the drive focused.

Next in line is the Vintage Chorus, delivering classic modulation with simple Speed and Depth controls. Subtle settings add movement and width, while deeper settings bring out a more pronounced, vintage character.

The chain ends with the Echo section, voiced for warm, musical repeats. With controls for Level, Tone, Repeat, and Tap Tempo, we can move from slap-back delays to longer rhythmic echoes that stay clear and controlled.

Carl also built in an effects loop between the overdrive and chorus sections. This allows us to insert a favorite drive or fuzz pedal exactly where it belongs in the signal chain — without rewiring the entire rig.

Quattro runs on an internal regulated ±12V power supply, providing the headroom needed to use high-quality components and maintain low noise throughout the system. The result is a multi-effect that feels open, dynamic, and transparent — designed to sound like your amp, not like a processor.

Key Features

• Five classic effects in one unit
• Compressor, Over Drive x 2, chorus and tap tempo delay/echo
• Send/Receive loop – for extra effects
• Built-in power supply
• Easy layout for fast live use
• Studio-quality analog sound

Dimensions: 410 x 160 x 70 / 16.14″ x 6.30″ x 2.76″
Weight: 2.0 kg / 4.41 lbs

Specifications

• Input: 1M Ohm
• Output: 100 Ohm
• S/N Ratio: 56 dB
• Compression range: from 1:1 to 1:00
• Gain range compressor: +-20 dB
• Gain Overdrive max: 89 dB
• Tone Overdrive: Cut filter (low pass)
• Echo time max: 1000 m.sec
• Send impedance loop: 200 Ohm
• Return impedance: 1M Ohm

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