rom 1971 forward, Ritchie Blackmore not only used the mid-rangy sounding Hornby-Skewes trebleboosters, he also used the highly dynamical and brilliant sounding CM booster, built and designed by Bill Hough. For all historical detailsRitchie Blackmore's Mk2 sound. The new BSM 71/73 CM is a faithful recreation of this pedal plus the typical BSM add-ons. This is all you need to cover the whole tonal range of the legendary Deep Purple Mk2 period. The “Mode” and “Bright” controls make this low-gain stompbox extremely versatile, producing a classical Hardrock tone with a lot of nuances. Not only useful for Blackmore- sounds this is a pedal that also works well with humbucking pickups, giving you a crisp yet dirty crunch sound on an already overdriven tube amp. You will even get a super-clean funky tone with single coils and a clean amp. You will probably never want to switch off this pedal anymore.