The SUBWAY D-800+ addresses the player who wants enhanced frequency control and an interface for outboard signal processing. The upscale D-800+ preamp features expand upon the acclaimed D-800 by including a comprehensive EQ section with Semi-Parametric sweep-able LOW and HIGH MID Bands, the addition of a BRIGHT switch, an adjustable HIGH-PASS Filter with control from 30Hz to 150 Hz, and on the Rear Panel, a Series Effects Loop, Tuner Output and 1/4” MUTE footswitch jack.