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Post subject: Using speaker wall jacks with PD150
Posted: Tue Aug 26, 2014 10:49 am
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Hobbyist
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Joined: Tue Aug 26, 2014 10:41 am
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I have a Passport PD 150 that we use in our children's worship space. I have run speaker wire in the wall with wall plate jacks, 1 at the front by each speaker and two toward the back where the unit is. The in wall runs are 25 ft and 35 ft. I am using the supplied speaker cables to hook the speakers up to the wall plates and then a 6' patch cable between the rear wall jacks and the head unit. I keep getting either a "clicking" noise or a "skipping" effect when I have both speakers plugged in. If I unplug either from the system, the one speaker works fine. Both speakers work fine hooked up directly to the head unit. Any suggestions what could be causing this? Are the speakers not designed to be wired like this? HELP!!!!!


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Post subject: Re: Using speaker wall jacks with PD150
Posted: Tue Sep 09, 2014 7:13 am
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Aspiring Musician
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Joined: Wed Feb 16, 2011 7:24 am
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The manual says the unit comes with 30 foot cables (longer than the cables I got with my Passport 300 Pro or 500 Pro). Add 25 or 35 foot in-wall cables, plus 6 foot cables, and that's a long length of cabling for a small PA, and we don't know the gauge of the wire in the wall. That might be more resistance than the system is really built for.

You have two separate power amplifiers, but only one power supply feeding both of them, so I'm guessing that the resistance of those speaker wires may be pushing the power supply beyond it's capacity, resulting in the power amps browning out, giving you the effects you are noting.

My suggestion is to either get some shorter wires between the amp and the wall plugs, or ignore the wall installation and use the system the way you already know it works: With the original speaker wires. I'm suspecting that the in-wall wires may be too thin creating excessively high resistance over that distance. It's just a guess, but the in-wall wiring is highly suspect given your description of the problem.


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