Our SUB Harmonic Generator is simple and effective, with blend-able subs/cleans you can add a subtle fatness or go full out synth. SPECIFICATIONS: SUB HARMONICS - set the amount of sun signal effect you require CLEAN - set the or blend the clean signal of the bass True Bypass Switching 100mA draw 9 Volt Power Supply (not included) The PRO-FX 9v rangeThe Ashdown PRO FX 9 volt range of effects pedals are designed for guitarists and bass players by guitarists and bass players. Designed and Engineered in the UK with Electronics Engineer Dave Green, Dave has been part of the team at Ashdown since around 2006 and has been behind many of our new products in terms of electronic design. This range of pedals has been months in development and are some of our best sounding pedals we have ever designed. Taking from what we have learned from the market we wanted an affordable range of pedals distinctive in looks but most importantly characterful in tone and features. All pedals in the range are constructed with robust Steel housings with Anodised front fascias. Genuine Neutrik Jack sockets are used throughout.