Mad Professor Simble Predriver

The Simble Predriver is a musical tool for guitar players and excels in simplicity! It is a preamp/booster/compressor/upper harmonic enhancer. ByÌ_boosting the signal and compressing it without the slow attack time theSimble PrediverÌ_also adds harmonic overtones. This musical combination is totally adjustable with your picking attack and guitar volume pot.