Patchbay problem - weak signal!
Posted: Fri Apr 20, 2007 6:28 am
Hey guys, hope someone has some input on my problem. Any advice would be appreciated.
I started wiring up the first of 3 patchbays last night in my three room studio that has been under construction for about 2 years. I am running Mogami 20pr multicore between the the control room and 2 tracking rooms. XLR channels 1-8 connect to XLR panels in both tracking rooms. Channels 9-12 only go to tracking room 1 and 13-16 only go to tracking room 2. All 16 XLR channels are routed back to the control room where I planned on running them through a patchbay normalled to the pre's on my Presonus LT and Tascam FW1884 (Yes, I know about the dangers of running phantom power through patchbays). Here's the problem...
I wired up the bay, and the input on the pre's are about 20db quieter running a mic signal throug the tracking room panel and through the patch bay than if I simply plug a mic straight into the preamp input. The patchbay is an ADC 52pt TRS bay. I purchased it used on ebay and it came prewired with about 20 feet of ProCo multi core. Could this be a video patchbay? If so would this cause the problem? Could the jacks themselves have a higher resistance (75 ohms?) and could that be what is causing the problem? Any input here would be much appreciated. The bay is high quality and I got a good deal on it so I would hate to find out its useless for audio but I also hate spending 7 hours soldering only to run into new problems. PLEASE HELP!!!
I started wiring up the first of 3 patchbays last night in my three room studio that has been under construction for about 2 years. I am running Mogami 20pr multicore between the the control room and 2 tracking rooms. XLR channels 1-8 connect to XLR panels in both tracking rooms. Channels 9-12 only go to tracking room 1 and 13-16 only go to tracking room 2. All 16 XLR channels are routed back to the control room where I planned on running them through a patchbay normalled to the pre's on my Presonus LT and Tascam FW1884 (Yes, I know about the dangers of running phantom power through patchbays). Here's the problem...
I wired up the bay, and the input on the pre's are about 20db quieter running a mic signal throug the tracking room panel and through the patch bay than if I simply plug a mic straight into the preamp input. The patchbay is an ADC 52pt TRS bay. I purchased it used on ebay and it came prewired with about 20 feet of ProCo multi core. Could this be a video patchbay? If so would this cause the problem? Could the jacks themselves have a higher resistance (75 ohms?) and could that be what is causing the problem? Any input here would be much appreciated. The bay is high quality and I got a good deal on it so I would hate to find out its useless for audio but I also hate spending 7 hours soldering only to run into new problems. PLEASE HELP!!!