G'day all...
I'm pretty new to the world of live sound, balanced audio and phantom power, so I need some help here...
My band is in the process of setting up our PA rig using a 40m snake (balanced). We are running a couple of guitar synth/effect units in stereo into our Behringer mixer via 2 x TRS balanced connectors. At the stage end, we are running Behringer DI20's which are capable of being powered via phantom power.
The problem I have is that the Behringer mixer only implements phantom power via the XLR connectors in the mono channels, not the TRS ones in the stereo channels. I have an aversion to using batteries (the damn things always seem to die when you most need them) and I'd really like to use phantom power if possible.
I found some good info at http://www.tangible-technology.com/p...r_connect.html and I'd be quite happy to mod the stage box to bring the power across from the mono channels to the stereo ones, but I can see some potential issues:
(a) will the 48V be a problem for the TRS inputs at the mixer? Can I isolate them?
(b) will I reduce separation either between the channels? I don't think so, but I thought I should check.
I was thinking of putting a pair of resistors and a capacitor on every channel - is this a dumb idea? Any suggestions as to how best to share the phantom power (or, indeed, whether I should even try) would be much appreciated.
Regards,
Alex
I'm pretty new to the world of live sound, balanced audio and phantom power, so I need some help here...
My band is in the process of setting up our PA rig using a 40m snake (balanced). We are running a couple of guitar synth/effect units in stereo into our Behringer mixer via 2 x TRS balanced connectors. At the stage end, we are running Behringer DI20's which are capable of being powered via phantom power.
The problem I have is that the Behringer mixer only implements phantom power via the XLR connectors in the mono channels, not the TRS ones in the stereo channels. I have an aversion to using batteries (the damn things always seem to die when you most need them) and I'd really like to use phantom power if possible.
I found some good info at http://www.tangible-technology.com/p...r_connect.html and I'd be quite happy to mod the stage box to bring the power across from the mono channels to the stereo ones, but I can see some potential issues:
(a) will the 48V be a problem for the TRS inputs at the mixer? Can I isolate them?
(b) will I reduce separation either between the channels? I don't think so, but I thought I should check.
I was thinking of putting a pair of resistors and a capacitor on every channel - is this a dumb idea? Any suggestions as to how best to share the phantom power (or, indeed, whether I should even try) would be much appreciated.
Regards,
Alex
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