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2009 crown vic speaker wires


 
Post new topic   Reply to topic    eLightbars.org Forum -> Non-lighting warning equipment
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einehummer
Member
Member


Joined: 22 Mar 2008
Posts: 15
Location: modesto,california
PostPosted: Fri 24-Oct-2008 22:19    Post subject: 2009 crown vic speaker wires Reply with quote
deputy would like to have his 2 way radio tied into both front door speakers,and still have the a/m fm sound coming through the front door speakers also, I tried , had no success, a/m f/m acted like it was grounding out. so I stopped.
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ka8ypy
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Regular


Joined: 13 Mar 2006
Posts: 494
Location: College Park, MD
PostPosted: Fri 24-Oct-2008 23:16    Post subject: Reply with quote
If the 2-way is a motorola, you need to put a 1:1 transformer between the radio and the speakers or you will fry the output circuit on the 2-way. Motorola radios do not use a grounded speaker.

Dan
Slick Top Solutions
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einehummer
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Member


Joined: 22 Mar 2008
Posts: 15
Location: modesto,california
PostPosted: Sat 25-Oct-2008 19:54    Post subject: Reply with quote
Thanks Dan, this 2way is a kenwood, I've tied in the motorolas before by cutting out the a/m f/m to the front speakers , but this is the first to utilize the a/m f/m with the 2 way at the same time. I can get one front speaker to work properly but not both together. either speaker will ground out the other, when hooked together
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QualityLights
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Joined: 23 Sep 2007
Posts: 1650
Location: Port Jervis, NY
PostPosted: Sat 25-Oct-2008 20:14    Post subject: Reply with quote
Rolls up news paper and smacks him on the nose... NO!... BAD! Seriously though, I would STRONGLY advise against this as you stand a really good chance of damaging the audio output circuit on the 2 way. It is designed for only so much impedance and it definitely IS NOT designed for audio to flow in reverse towards the circuit. Tell the deputy that the radio is not designed for what he wants it to do and that it will void any warranty (if there is one) and will damage his equipment.
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usdemt
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Joined: 07 Mar 2008
Posts: 918
Location: Britton/Vermillion SD
PostPosted: Sat 25-Oct-2008 20:58    Post subject: Reply with quote
I am not a radio guy, but just a thought, can you put diodes? (I think, the electrical check valves) in on each wire to both the 2way and the AM/FM? Then they wont back feed. As far as mixing the two when they are both outputing sound I dont know what would happen.
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QualityLights
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Joined: 23 Sep 2007
Posts: 1650
Location: Port Jervis, NY
PostPosted: Sun 26-Oct-2008 07:22    Post subject: Re: Reply with quote
[quote:a7d89d5d6c=\"usdemt\"]I am not a radio guy, but just a thought, can you put diodes? (I think, the electrical check valves) in on each wire to both the 2way and the AM/FM? Then they wont back feed. As far as mixing the two when they are both outputing sound I dont know what would happen.


It can be done to protect the radio from feedback, but... if one of them fails, you won't realize it until it is too late and your radio gets real quiet.
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