1999 MARSHALL JCM2000 DSL DUAL SUPER LEAD. A nice clean example of a Marshall JCM 2000 DSL100 Head from 1999 that is no longer in production, but remains one of the company's fan-favorite amps through a timeless design and reams of power. An acronym for "Dual Super Lead," the DSL100 is built on a dual footswitchable channel design with options for reverb, three-band EQ, and presence on each channel. Want even more? Each channel sports two unique modes: Clean and Crunch on the Classic Channel and separate Leads on Ultra for the sounds of four amps in one head.