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:
Features:
- Preamp, booster, compressor, upper harmonic enhancer in one stompbox
- Totally adjustable with your picking attack and guitar's volume pot
- True bypass
- Status LED
- Runs with 9 V battery or 9 V DC power supply
