The Tone City Model M is a 2 channel overdrive pedal. The channels can be used independently or combined. The Model M delivers two flavors of classic British Plexi-style tone. Crunch mode covers the rock sounds of the 60s and 70s, from light overdrive to rich crunch; high gain mode offers an accentuated mid-range and extremely high gain. The pedal has amp-like response and nice clean-up and dynamic response to the guitar's volume knob.