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The Mad Professor Simble Predriver is not just a preamp, it is a preamp/booster/compressor/upper harmonic enhancer. This musical tonal combination is totally adjustable with your picking attack and guitar's volume pot. The amount of boost depends on the input signal level and Hot/Cool switch position. Maximum is about +10dB on lower level notes and average is about +6dB. Simble Predriver's special circuitry uses low noise transistor with high input impedance (over 2 Mohm) so you can boost even piezo pickups without tone loss. The output impedance is 50 Kohm so it works even in front of fuzz pedals.
Controls:
Hot/Cool switch
Features:
Preamp, booster, compressor, upper harmonic enhancer in one stompbox
Totally adjustable with your picking attack and guitar's volume pot
