The Max 158 bass amp is a 20 watt 1x8" combo practice amp loaded with features. Features include 1/4" input, Volume with Transtube distortion boost and psyco-acoustic low end enhancement. The Max 158 also features a 3 band EQ, chromatic tuner and 1/8" jacks for phones output and aux input. The Max 158 also includes patented Peavey DDT speaker protection.