patchbays

[guy]

Hi I'm about to wire a studio soon and I wonder if you could help me.
the live room has a stage box with 16 send and 4 returns on xlrs with a multicore that goes to the control room (the other hand is still not soldered).
my patchbay is a balanced (trs back+front) one.
may I just conect all machines and stagebox via trs to the patchbay?
will it be possible/safe to send 48v power from the pres through the patchbay to the stagebox and than to mics?
thanx
guy

 

[frederic]

Yes, you can connect all the machines that way. Use quality cables!

And yes, its perfectly safe to send 48V through your patch bays, I do it all the time.

Hi I'm about to wire a studio soon and I wonder if you could help me.
the live room has a stage box with 16 send and 4 returns on xlrs with a multicore that goes to the control room (the other hand is still not soldered).
my patchbay is a balanced (trs back+front) one.
may I just conect all machines and stagebox via trs to the patchbay?
will it be possible/safe to send 48v power from the pres through the patchbay to the stagebox and than to mics?
thanx
guy

 

[Rochey]

i'd like to argue with that (breifly)

if your using TRS jacks, then it is not a good idea to put phantom power through it, as the phantom power is temporaily shorted when you put the cable in or pull it out.

Most mixers and pre amps have protection against this, but, at the same time, it doesn't do it any good at all!

just my 2c

d

 

[Track Rat]

I'd like to echo Rochey's comment on phantom power and patchbays. It can definately be a problem. When inserting and removing a 1/4" TRS connector into and out of a jack, one end of the patch cable will be energized on the tip. That tip is going to pass through the ground portion of the jack before seating, which is going to set up a momentary short. If you're going to use a 1/4" type patch bay for mic patching be sure to make a PROMINANT note on it to be sure to turn off phantom power on all the preamps before doing any kind of patching.

 

[guy]

thanx guys!
I can c the problam and I believe it can be resolve by folowing the role that you MUST NOT plug in/out patches while sending 48v.
but anyway what is than your solution to the set up I describe before?

 

[Track Rat]

What I've done was to have a jack plate in the wall of my tracking room with 16 XLRs on it that's hard wired to my mic pre's.
On this jack plate it's clearly marked which jack goes to which pre. The line out puts of these pre's goes to the patch bay so I can patch the out put of the desired pre to the desired devices input. No danger of toasting anything.