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Old 12-18-2011, 10:19 PM   #1
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2 channel or 4 channel?

What head unit do I need?Gonna put a new system in the tj but not going with a sub or a amp.Just going with new speakers in the soundbar and dash and a new head unit but know nothing about them just how to turn them on.Do I need a 4 channel to run the 4 speakers or does the 2 channel work for 4 speakers?

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Old 12-18-2011, 10:25 PM   #2
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I'm confused. Are you asking about an amp or head unit? I ask because 2 and 4 channel describes an amp but said you're asking about a head unit.

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Old 12-18-2011, 10:31 PM   #3
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I may not be online much longer, so I'll make some assumptions here....forgive me if I'm reading your post incorrectly.

2-channel & 4-channel describes an amp. 2-channel is usually used to run a sub (or set of subs) in mono. 4-channel are typically used to run front and rear speaker.

An amp sits between the head unit and speaker. if you're asking about a head unit, 2 and 4 channel has nothing to do with it. You can, however, get head units w/ multiple pre-amp (used to connect head unit to amp) output. Most will come w/ one, maybe two sets. However, since you said you aren't going to run an amp and sub(s), just pick a head unit that has the functionality you want.

Hope this helps.
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Old 12-19-2011, 12:05 AM   #4
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thanks,i got what you are saying.I was looking at crutchfield at head units and the choices were 2 ch and 4 ch and I wasn't sure what that had to do with anything.
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Old 12-19-2011, 10:49 AM   #5
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Really? Guess I've been out of the audio game for a while. Lol

I'll have to look that up. Dont want to mislead you.
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Old 12-19-2011, 10:51 AM   #6
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If you get time shoot me a link to a head unit that says that. Thanks
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Old 12-19-2011, 10:59 AM   #7
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you can always jump the two channels to run the fronts and rears together such as,

Channel 1 runs LF and LR
Channel 2 runs RF and RR

But, with todays surround sound and digital mastering, your best off with 4 channels running like this

Channel 1 - LF
Channel 2 - RF
Channel 3 - LR
Channel 4 - RR

Basically... but each wire should labeled on the four channel front/rear/etc...

you may run the rear channels through an amp. I would usually run my front speakers off the sterio then amp the cabinet in the back or subs leaving my front two channels at normal level and giving me the amp adjustment to adjust the rear thump seperately.
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Old 12-19-2011, 09:10 PM   #8
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Thanks to both of you.You can go to cruthfield.com and see the option list on the left side after you click on head units.I might just stay with 2 ch because of price,i really don't need all that much just want to hear it topless.
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Old 12-19-2011, 09:58 PM   #9
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Ok, I see where you're getting confused now. I thought this was what you were asking from the beginning but I wasn't sure.

Here's the deal.....forget about 2-channel vs 4-channel as this is irrelevant to what you're wanting to do. The "channel" configuration is in relation to how many pre-amp outputs (the red and white connectors on the back on of the radio) there are. These are used to send audio output to 1 or more amps. The amps then send the amplified audio signal to a set or sets of speakers.

You stating you don't want (or plan) to hook up an amp and subs. So when you install your new headunit you'll use the radio's wiring harness to hook into the factory speaker wires. You won't be using the pre-amp (red/white) connectors.

So, in short, 2 vs 4 channel is useless to you since you won't be hooking up amps.

Make sense? Hope so.

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