Help! 3 Pin Phoenix Type Connectors? - AVS Forum
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post #1 of 7 Old 06-11-2013, 06:56 AM - Thread Starter
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I suspect my initial post was a bit meaty, so perhaps I'll just distill it down to one question:

The amp I'm looking at - the Crown CT875 8-channel amplifier, 75watt per channel - has 3 pin Phoenix type connectors for the inputs. I've never used these before. I'm looking at connecting in 5 Apple Airport Express', which from what I can tell use a Mini-Stereo connector. A bit of Google-ing led me to the cable I think I would need http://www.onyougo.com/revolabs-35mm-balanced-male-connector-to-3-pin-mini-phoenix-connector-audiovideo-cables_pi1760550

Is this all I need for connectors?

Many thanks!
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post #2 of 7 Old 06-11-2013, 08:31 AM
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The amp has balanced inputs, the airport express has unbalanced stereo outputs. You'd be feeding left and right to the differential inputs of each amplifier....the output would be the difference, L - R.
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post #3 of 7 Old 06-11-2013, 11:44 AM - Thread Starter
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Thanks for getting back to me so quickly. As I'm a bit of a noob when it comes to balanced/differential inputs, is that a yes? Am I ok with just the proper cable and plugging the airport express directly into the amp?
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post #4 of 7 Old 06-11-2013, 11:57 AM
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no.
Are you'll need to combine the two channels out of the airport, then connect the hot to the + input on the amp and the ground to ground, leave the - input floating.
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post #5 of 7 Old 06-11-2013, 05:52 PM
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What you need is a 3.5 mm headphone “y” splitter cable. Cut off both ends of the “y” and strip back the insulation. Connect the two “y” cable center conductors to the (+) terminals of two amplifier channels, and the cable’s shield to the (-) terminals. Connect a jumper from the (-) terminals to the ground terminal.

Regards,
Wayne A. Pflughaupt



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post #6 of 7 Old 06-12-2013, 03:58 AM
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Do you want stereo or mono?
No need to short the - input to ground.
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post #7 of 7 Old 06-12-2013, 06:12 AM - Thread Starter
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I have 2 speakers per zone, and I would prefer stereo out of each speaker, but could live with mono as they are close by and are just for background music...
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