Fender Rumble 15, Black/Silver - The all-new Rumble Series is a mighty leap forward in the evolution of portable bass amps. Don't let its diminutive stature fool you - Rumble 15 uses every last electron of its 15 watts to pump out a surprisingly rich and balanced sound. Whether its for an acoustic gig or backstage rehearsal, Rumble 15 delivers legendary Fender tone in a remarkably portable package.