The Switchcraft PTAESEBU2DB25 is a Rack Mounted Pass Through Patchbay for AES/EBU. You get two groups of four XLR's in. Each group of four XLR connectors are routed to a DB25 Rear Output wired for AES/EBU utilizing the TASCAM DTRS standard pinout. Breakout cables sold seperately. PT Series Audio Pass-Through I/O Panels are a perfect solution for anyone requiring front-of-rack access to their I/O in any permanent or mobile studio environment.