Our exclusive high current power section, combined with dual Speakon/Combo jacks, a lower noise floor, a quieter fan, a full 4-band EQ section, and Quilter’s latest headphone and direct-out interface features makes this our most advanced Bass Block ever! Responding to user requests, we have added an Effects Loop, plus a switchable pre-Master Line-Out for stage use, or post-Master Headphone outlet for silent practice. Solid aluminum heat sink and variable speed fan provide more cooling with less noise.