2 head units to diode or not to diode?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=112040
Printed Date: May 15, 2024 at 7:33 AM

Topic: 2 head units to diode or not to diode?

Posted By: coolen
Subject: 2 head units to diode or not to diode?
Date Posted: March 02, 2009 at 7:03 AM

I just picked up a dvd deck for my truck. i currently have a cd headunit in there now. would it be ok to install the dvd one the same way as the existing head unit? i have no intentions in running both at the same time, i was just wondering if the speaker out put of one, would interfere or hurt the out puts of the cd deck while it's not in use.

Thanks

Replies:

Posted By: i am an idiot
Date Posted: March 02, 2009 at 7:22 AM

Diodes will not work in this application. Does one or the other units have an Aux Input set of RCA jacks? You will need to use relays to isolate the speaker wires or feed one unit's rca output into the other unit's rca input, and connect the speaker wires to the unit that has the aux input.

Posted By: coolen
Date Posted: March 02, 2009 at 7:24 AM

both decks have rca in's and outs. so is it just as simple as what you just posted? hooking one deck's output to the other decks input? that sounds pretty painless.

Posted By: haemphyst
Date Posted: March 02, 2009 at 7:34 AM

That's the way I'd do it! posted_image

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: coolen
Date Posted: March 02, 2009 at 11:57 AM

well, unfortunatley i was wrong on one thing. the current deck that is in my truck does not have rca in's. so i guess my only option would be to wire up the dvd deck as the main headunit. does that sound right?

i've got a jvc kd-320, installation manual here: https://resources.jvc.com/Resources/00/00/93/GET0349-002A.pdf

the dvd deck has many many rca's on it.

Posted By: coolen
Date Posted: March 02, 2009 at 2:04 PM

from what i've been reading, i can hook up this other deck as usual, only if the other is turned off when it's in use? the big question is always why- so i'll take the time to answer that. the existing jvc deck is there to play mp3's. it is also hooked up to my amp to run 2 -10 '' subs, and sounds great! this other decks main use will be for the screen. not only that, but it also has an USB port. the jvc does not.

thanks

Posted By: i am an idiot
Date Posted: March 02, 2009 at 4:27 PM

Cool let me give you shipping info for when it or they quit working. I will be happy to repair them for you.

Posted By: coolen
Date Posted: March 02, 2009 at 4:44 PM

oh thanks, that would be great!