The BSM RM is based on the british Range Master unit produced between 1965 and 1969, as used by Eric Clapton in John Mayall's Bluesbreakers. Eric also used the booster when playing in the legendary group Cream. Its biting, powerful sound is clearly in evidence on the Bluesbreakers "Beano" album. Blues rocker Rory Gallagher, Glam rocker Mark Bolan, Heavy Rock pioneer Tony Iommi and Brian May from Queen were also heavy users of the original Range Master unit.

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RM early days Treble Booster

The BSM RPA Special Booster is a combination of Ritchie Blackmores AIWA reel-to-reel tape recorder preamp stage plus the high-pass treble booster function from Blackmores hot-rodded Marshal Major amp, to emulate Ritchies post '74 sound with any standard amp. In 1974, right before the start of the "Burn" tour, Ritchie Blackmore changed his live setup. First and foremost, he wanted to play live with an echo effect and made the AIWA TP-1011 reel-to-reel tape recorder his first choice. This unit offered the typical 2/3 seconds echo repeat, perfectly matching Blackmores natural beat. Additionally, Ritchie Blackmore used the integrated microphone pre-amp as a booster, and with this his beloved Hornby-Skewes treblebooster he used for many years was not longer needed and was sent into retirement.

Demo by  Janeck DZUGAN

Demo by  elswan64

RPA special Booster

The Hornby-Skewes Treble Booster was Ritchies favorite box for live and studio recordings like the famous 1971 "Machine Head" or the later 1974 "Burn" session. The HS-S Master in front of a Vox AC30 gives you the unique sound of the well-known rock hymn "Smoke on the water". Compared to its forerunner, the HS-S sounds a tad more aggressive with more mid-range with the guitar’s volume pot fully opened, a little bit similar to a WahWah sound. But the higher the pre-amp volume of the amp is dialed in, the more this midrangy tone will be forced into the background because now the saturation of the amp will generate the necessary harmonics. So it´s up to you to chase the sweet spot of the HS-S unit. You will have to raise the pre-amp volume of a Marshall Major noticeably because this amp is a very clean sounding one. To have some good reserves when dialing in the pre-amp volume Blackmore had his Major amps modded early with a cascaded pre-amp design right from the factory.

Demo by Leon van der Meer

Demo by Haiko Heinz

HS-S Treble Booster 

The BSM HS model is based on the short-lived early edition British HORNBY-SKEWES unit produced, as used by Ritchie Blackmore, the brilliant and impulsive guitarist of Deep Purple. The unit produces a powerful and biting sound that was used to help create the epochal masterpieces e.g. "Deep Purple In Rock" and "Fireball". The long yearned for new edition, now issued under the name HS from BSM, includes the same germanium transistors as the 1965 version. The HS-Custom model includes a volume control (like Blackmore's modification).

Demo by  Brett Kingman

Demo by Manuel Bastian

HS-Custom Treble Booster

Many guitarists of the late 60s and early 70s knew how to get a rough earthy and unmistakable sound out of their humbucking pickups and tube amplifiers, which in retrospect has not been possible to recreate so far. BSM has dedicated so many booster pedals to this subject to receive these historical sounds with every tube amp, that offers a powerful clean or crunch character. But it ́s impossible to drive a treble booster pedal into saturation so the idea came up to develop a stand-alone version you can also use in front of a clean amp to get some crunch without the typical mid-honk sound and to replace the overdrive pedals on your pedalboard.

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Weitere Pedals von BSM - Meiser Electronics

BSM - Meiser Electronics

RM early days Treble Booster

BSM - Meiser Electronics

RPA special Booster

BSM - Meiser Electronics

HS-S Treble Booster

BSM - Meiser Electronics

HS-Custom Treble Booster

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