Catalinbread Dirty Little Secret MKIII Overdrive Marshall in a Box

Marshall amps helped supercharge the performance, and shape the sound of
rock and roll. In the absence of your own personal wall of Marshalls
and the necessary road crew required to lug them around, the Dirty
Little Secret (DLS) is the perfect secret weapon in your tone arsenal.
This is your “always on” pedal, designed to be the “foundation” of your
pedalboard, transforming any amplifier into those raging British stacks.
It forms the core of your guitar sound which you can enhance and
embellish by adding boosters, fuzzes, filters, and other overdrives in
front of it – just like you would in front of a real amp. And the reason
you can leave it always on is that you can get a great clean sound just
by rolling back your guitar’s volume knob! That’s the way the old
school Marshall players did things!