Fender Rumble 500 nut 1 3/4" It is probably the most

It is probably the most produced and sold pedal in the history of guitar pedals

Sportsman Owner's Manual - pdf 656

or 100-watt modes

Responds to nuance and volume changes

Famous users:  Frank Zappa

Fender Rumble 500 nut 1 3/4" It is probably the mostThe all new Rumble Series is a mighty leap forward in the evolution of portable bass amps. Re engineered from the ground up, new Rumble amps are lighter and louder than ever, with even more power and a classic Fender vibe. A newly developed foot switchable overdrive circuit and versatile three button voicing palette deliver powerful tones ideal for any gig. Additional upgrades include Eminence drivers and premium HF compression tweeters.