The Kustom John Moyer KBA 16X JM is a 16W practice bass guitar combo amplifier that's great for warming up backstage or for working at home or in the studio.Kustom and John Moyer, acclaimed bassist for the multi-platinum band Disturbed, have joined forces to produce a series of Signature Kustom amplifiers. The John Moyer practice amp features customized graphics inspired by John on the cabinet's metal grill, a 4-band active EQ, built-in limiter, Celestion speaker, and an external speaker jack.