The MAX® 158 combo bass amp is an awesome practice amp, designed for all levels of players. Whether you're just learning to play or warming up backstage, the MAX® 158 is a great bass amp to own. Peavey has added exclusive TransTube® technology giving you two separate voicing selections Vintage and Modern each with its own distinct tone. With 15 watts of power, low, mid and high EQ controls driving an 8 inch speaker, this little amp really puts out some bass.