This 6-space rack holds (top to bottom): Furman PL-Plus power conditioner, MOTU 828k3 Hybrid audio interface, a vent panel (the ART has tubes), ART TubeOpto 8 multi-channel mic preamp with ADAT I/O, Presonus DigiMax LT 8-channel mic preamp with ADAT output, and PreSonus HP4 headphone amp. A Line 6 POD 2.0 sits on top and is cabled to two analog inputs on the MOTU. A cassette deck is also cabled to two MOTU analog inputs for digitizing old tapes.