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how to wire this system?

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=59945
Printed Date: May 13, 2025 at 7:01 PM


Topic: how to wire this system?

Posted By: jarnld
Subject: how to wire this system?
Date Posted: July 23, 2005 at 11:40 PM

 So Im not good with the electrical aspect of systems...I just do fabrication....heres my question
 
 
I have a dvd receiver that has 3 sets of rca out on the back (R,F,Sub) and the brain has 2 video ins and another input for a cd changer..
I also have a Pioneer cd player that only has one set of RCAs.

Im using a MTX 4 channel amp to drive 6 speakers. Two 6.5 in the rear, two 5 1/4 in the back wired together with my tweeters.

Then I have a Rockford Fosgate 2 channel amp that im using to drive 2 kenwood 12" subs.

How would you wire this system? How can I wire the pioneer (one set RCA) to run to 2 amps but have the DVD receiver wired to the amps at the same time? Is it okay to power the two receivers off the same power/ground lead?

And as for the subs...would you suggest one channel per sub, or running them in parallel and bridging the amp?

Let me know how YOU would wire this...as you can all probably tell, Im really bad at this kinda stuff. Iam learning thanks to you guys however!



Replies:

Posted By: stevdart
Date Posted: July 24, 2005 at 6:58 AM

Use the one deck, the DVD with the three outputs and aux inputs.  Instead of trying to also use a CD player, get the proper CD changer and plug it into the changer input on the deck.  You want just one main head unit for your system.  And can't you play CD's on the DVD player anyway?

Post a link or provide coil config. for those subs.  Nobody can guess what impedance they are to help you out about hooking up to the amp.

A four channel amp can drive 6 speakers only if two pairs of those speakers are separated by  crossovers.  The 5.25's you said were wired with the tweeters:  are they connected with crossovers?



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: jarnld
Date Posted: July 26, 2005 at 1:39 AM

The dvd receiver is just a receiver...no sot to insert cd/dvds.  The subs are single coil and 4 ohm stable and they are rated at 500watts.  Instead of using the JBLs I decided to use four Polk Audio 6.5" - two in the back and two in the front.  The tweeters have a built in crossover.  If i wired them together (tweets and 6.5") they would be okay?  So it would be like this...

Channel 1 - back left speaker

Channel 2- back right speaker

Channel 3 - front left mid and tweeter wired together (in series?)

Channel 4- front right mid and tweeter wired together (in series?)

SUBS

Im thinking of wiring them in parallel and bridging the amp.  The amp puts out 460 watts with all channels full power at 2ohms.  So if I run two 4 ohm subs in parallel that drops them to 2 ohms, right?  Then bridging them will get full power but still within the limitations of the amp.  Am I okay doing this or am I way off?

THANKS!





Posted By: stevdart
Date Posted: July 26, 2005 at 6:52 AM

jarnid wrote:

So if I run two 4 ohm subs in parallel that drops them to 2 ohms, right?  Then bridging them will get full power but still within the limitations of the amp.  Am I okay doing this or am I way off?

A bridged load can be NO LESS than a 4 ohm load, which means with your SVC 4ohm subs your better bet is to use a mono amp instead of the two channel amp you want to use.  Given what you have to work with, you will need to wire the subs in series and bridge the 8 ohm load onto the amp.

Look at your amp's specs and you'll see that a 2 ohm load is not listed as a bridgeable load.

Mids and tweets with a crossover:  the xover itself gets the signal from the amp, then splits out to the mid and tweet.  You are not wiring either series or parallel when you separate components by using a crossover.  The impedance of each will be maintained. 



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: jarnld
Date Posted: July 26, 2005 at 2:59 PM

??  Im not using a component system.  I have the POLKs which are 2 ways and then I have my tweeters which have built in crossovers.  How would you wire this?





Posted By: Master Asylum
Date Posted: July 26, 2005 at 4:04 PM

This might make things a bit easier to understand...

Can you provide manufacturer and like ID for the products you have? Like model numbers?

You are definitely having trouble getting across what exactly you have. You are saying you have a mid and tweeter wired together but they aren't components, when that's exactly what they should be... a 2 way component set. Another way I can kinda read is that you have 2 pairs of coaxial speakers(4 6.5 speakers with mids+tweeters) and 1 pair has a 2nd tweeter wired into the mid... Which well, I've never heard of but who knows... I'd say Model #'s and such will be useful.



-------------
1998 Monte Carlo w/
Eclipse CD8454
2xRockford 5.25" Power 2-way T152C
2xRockford 6"x9" Punch 3-way FRC4369
1xMemphis 16-MCH1300 5-channel
2xKicker 12" L5 Solobaric-2 Ohm




Posted By: jarnld
Date Posted: July 26, 2005 at 4:40 PM
I have 4 polk ex365 2 way speakers and then I have 2 xplod tweeters (with built in crossovers) that i dont know the model number to.  I also have 2 JBL 5 1/4 2 way speakers if anyone thinks I should use those up front instead of the Polk audios.  SHould have made life easier on myself and just bought a component system...




Posted By: stevdart
Date Posted: July 26, 2005 at 4:48 PM
Use a total of four 2-way speakers in your car...2 in front and 2 in back.  A two-way speaker has the mid and tweeter and is called a coaxial.  The extra set of 2-ways (coaxials) and the Xplod tweeters don't need to be a part of the installation.

-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: Master Asylum
Date Posted: July 26, 2005 at 5:31 PM

Actually components are called 2 way as well... Atleast marketted that way. :P Anyways, I'd say stick with similar product lines unless your JBLs are much better. (I don't know the quality of JBL product.) Otherwise scrap your Xplod tweeters and stick with just 4. In which case very easy, wire 1 channel to each speaker. Which solves the dilemma you are having there. Getting components I do not believe would have made this any easier for you. Especially since you are still learning here.



-------------
1998 Monte Carlo w/
Eclipse CD8454
2xRockford 5.25" Power 2-way T152C
2xRockford 6"x9" Punch 3-way FRC4369
1xMemphis 16-MCH1300 5-channel
2xKicker 12" L5 Solobaric-2 Ohm




Posted By: jarnld
Date Posted: July 26, 2005 at 9:27 PM
Yeah...Im definately still learning.  Electrical kind of stuff I don't do too well. I can do basic installs.  My focus and area of expertise is on fabrication and design.  SO THANK YOU ALL FOR YOUR HELP.  MUCH APPRECIATED!





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