The Quattro begins with Carl Martin's Compressor/Limiter circuit with single controls for compression and level. The Two-Channel Overdrive has switches for on-off, and for selecting between the crunch and high-gain stages, and controls for tone and level. In classic fashion, the Tremolo has a speed and a depth control. Finally, the vintage style Echo has controls for level, tone, repeat and tap-tempo, as well as an on-off switch.
No hard to read screens, no menus to scroll through, just set-up and play. There is also an effects loop built in between the overdrive and tremolo effects for that special drive or fuzz pedal that is part of your sound.
The Quattro features ultra quiet switching, an on-board regulated +/-12V power supply to allow for increased headroom, and low output impedance which leaves your amp sounding exactly like your amp according to the company.
For more information, visit their web site at www.carlmartin.com.