Check the listing for details. Grace Design m308 Active 8-channel Isolated Direct Box. Condition: New. Listed at 1995.00 USD. Eight Channels of Industry-leading DI Performance Leveraging the same circuitry and sonic performance as Grace Design’s industry-leading m303 and m303s direct boxes, the company’s m308 delivers superior DI performance in an 8-channel rackmount unit for stage, studio, and installation applications that require higher channel counts. This active, galvanically isolated DI features Grace’s advanced power supply — a design that Sweetwater engineers champion for its exceptional headroom and massive dynamic range. Next, custom-wound Lundahl transformers ensure that your signal resounds with both enhanced low-end definition and pristine top-end detail. Need to tame a hot signal? The M308s features dedicated per-channel 13dB pad switches.