RPA California II Treble Booster

BOOSTER

In November 1973, 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 1/3 seconds echo repeat, perfectly matching Blackmore's natural beat. Additionally, Blackmore used the integrated microphone pre-amp as a booster, and so his beloved Hornby-Skewes trebleboosters, he used for many years, were no longer needed and sent into retirement. The necessary trebleboost function (from a technical point of view a "highpass" function), was built into his heavily modified Marshall Major amp.