Tube guitar Amp Head. The DSL features two foot switchable channels: CLASSIC GAIN and ULTRA GAIN. The CLASSIC GAIN channel delivers sparkling clean sounds through to the more aggressive break-up of a Marshall JCM800 amplifier. The ULTRA GAIN channel provides even more distortion and break-up for players looking for higher gain tone from their amplifier. Both channels share a passive three-band EQ, with BASS, MIDDLE and TREBLE controls. The EQ section also features Tone Shift, which when activated reconfigures the pre-amp mid frequencies making DSL ideal for contemporary metal tones, especially when combined with higher gain settings. The DSL 1 features professional quality digital REVERB and a series FX LOOP, giving you rich valve tone at an ear-friendly volume. Footswitch included.