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Old 08-17-2011, 11:39 PM
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Personal Car Audio System Question

I recently decided on my system and was just wondering if there is anything I'm missing or if anything is wrong. Here is everything I plan on buying:

*Head Unit*
http://www.sonicelectronix.com/item_22003_JVC-KW-XR610.html

*Speakers*
http://www.sonicelectronix.com/item_31096_Pioneer-TS-A6874R.html

*Sub-woofers*
http://www.sonicelectronix.com/item_26889_Pioneer-TS-SW2501S2.html

*Amplifier*
http://www.sonicelectronix.com/item_30650_MTX-RFL300D.html

*Enclosure*
http://caraudiofactory.com/19971999-ford-f150-p-402.html

Please let me know! Thanks!
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Old 08-18-2011, 08:06 AM
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looking at that HU doesn't look like it has sub out preamps
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Old 08-18-2011, 02:21 PM
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Along with the lack of sub out i noticed those subs are 2ohm each, which would be wired to 1 or 4ohm. since that amp isn't stable at 1ohm you'd only be getting 300w total @ 4ohm instead of the 600w you were probably going for. if you get them in 4ohm models you can wire to 2ohm and get the most of that amp; http://www.sonicelectronix.com/item_...-SW2501S4.html

Also, don't forget a wiring kit for the amp!

EDIT: Read the amp specs wrong, you'd only be powering the subs half their rated rms even at 2ohm, might want to look at a 600w rms amp @2ohm?

Last edited by Colton; 08-18-2011 at 02:27 PM.
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Old 08-18-2011, 11:15 PM
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The HU has:
Preamp RCA Outputs - 2 Pairs (Front and Switchable Rear/Subwoofer)
Sub Preamp RCA Output - No

I want to power my subs at the RMS rating (300 watts). I'm new at all this and the only thing I don't fully understand are amps... Could you possible give me some tips? I thought that since the subs are 2ohms and the amp is 2-channel mono I would put 1 sub in each channel and wire them like this:

http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2SVC_2-ohm_2ch.jpg

That way the amp would take the subs at 2ohms and I would get the 300 watts I'm looking for, for the subs. I could be wrong though, since I'm new at this...

Thanks again for the help!
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Old 08-19-2011, 10:17 AM
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The amp is mono, as in one channel. They give you two sets of terminals to make wiring up a parallel pair of speakers easier. The total load on the amp cannot go below 2ohms.

You need two 4 ohm subs.
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Old 08-19-2011, 01:49 PM
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Okay, that makes sense now. So if I get the 4ohm subs and wire them like this:

http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2SVC_4-ohm_mono.jpg

(but with 2 channels, just to make wiring easier)

it should work?
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Old 08-19-2011, 07:37 PM
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Yup, wiring like that with a mono amp like the MTX you were looking at would work fine, but you'll be underpowering the subs by half because the 300w is each sub; two of them = 600w rms to be optimally matched power wise. If you're set on MTX I would recommend something more like this: http://www.sonicelectronix.com/item_...X-RFL600D.html
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Old 08-19-2011, 11:38 PM
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Thanks for all this help! I understand how it all works now, haha! I appreciate everyone's time!

Thanks again, Ryan
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Old 08-20-2011, 02:14 PM
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You're very welcome, stop by anytime!

Let us know how it works out
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