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Old 04-06-2012, 07:07 AM   #1
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Polk dxi 650 vs. db651 for JKU

New to the site. Awesome place and I have learned a ton.

Can someone tell me the difference between these two speakers? Crutchfield has db 651 for use in the sound bar and the dxi for the dash...just wondering.

Thank you in advance.

BTW, have a 12" JKU Sahara with factory Infinity with Sub..

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Old 04-06-2012, 01:31 PM   #2
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i believe, from everything i've been able to find out, that the dxi are geared to replace the db's. i went dxi for my soundbar, and they went in just fine with no issues (used the adapters that came with it from crutchfield), and are covered by the stock grill.

to be honest, you probably wouldn't be able to tell the difference between the two.

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Old 04-06-2012, 01:33 PM   #3
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bear in mind, the polk's are 4 ohm speakers, and the stock system (infinity and base) are 2 ohms. you may be better off looking at the infinity kappas or some other 2 ohm speaker upgrade, if you're worried about losing too much volume with the 4 ohms. there are a couple of threads on that if you search for it.
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Old 04-06-2012, 02:53 PM   #4
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Thanks for the response. I plan on upgrading the head unit with a Pioneer AppRadio so not sure how that will change things..
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Old 04-06-2012, 02:58 PM   #5
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Then you'll probably want to stick with the polks. I've got the dxi650s in my sound bar, and am really pleased with them.
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Old 04-14-2012, 05:09 AM   #6
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As an FYI...
Crutchfield has the 651s for the Wrangler, not the 651. They are different speakers.
The 651s is a slim-mount speaker.

Here is an excellent visual showing the difference between the two.
db651_vs_db651s - Useful-Info


That difference is how based on how far the tweeter sticks out, not the depth of the woofer. However, the low end specs are not the same.

As for the db vs the dx series.....good question...
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Old 09-20-2012, 01:38 PM   #7
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Hello all. I'm new here as well. Wealth of info on these forums.

I am buying the Polk 651 speakers for my 2010jku, and I was wondering if I did in fact need the 651s (slims)? Without the slims I'm assuming the factory speaker cover on the speaker bar will not fit back on?
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Old 09-28-2012, 02:06 PM   #8
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you'll need the slims, you wont be able to fit the regular sized unit in behind the grill's, both front and rear. and good luck with the front drivers side, you'll be swearing a lot as you take apart the dash to pry out the speaker enclosure. good luck
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Old 09-28-2012, 04:52 PM   #9
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You don't need the slims for the front. I also recommend the 6500 components fir the front. Whatever you decide, buy foam baffles to create a tight seal for better bass response (cut the bottoms out though).
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Old 09-28-2012, 05:07 PM   #10
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Quote:
Originally Posted by igf101 View Post
You don't need the slims for the front. I also recommend the 6500 components fir the front. Whatever you decide, buy foam baffles to create a tight seal for better bass response (cut the bottoms out though).

I tried the regular 651's on the front and the tweeter dome pressed firmly on the grill, i mean it fit but i didn't wanna risk screwing something up with it rubbing on the grill.
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Old 09-29-2012, 08:55 AM   #11
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Hrm...that I didn't think about, but that's another reason to go with the components.

Where are you at in Pittsburgh? I'm in Castle Shannon.
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Old 09-30-2012, 10:21 AM   #12
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I'm in green tree, not too far really. When you're ready to do your install lemme know and I'll give ya a hand. Having done it once should cut down on the time. The Db651s that I've installed sound really good, very clean. I'll be installing a new GPS head unit this week which should improve sound even more
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Old 09-30-2012, 02:21 PM   #13
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Thanks for the info. I'm planning on going 6501 up front, and 651s's in the rear. 4 channel amp and new HU to power it all. Poly fill the roll bar, and then I'm going to try baffles up front.

Is the only benefit to baffles being the tighter seal between speaker and mounting bracket? I can understand that I guess, but then like you said, you would have to cut a hole in the back so you get the benefit of bass resonance in the whole dash and not just inside the baffle.

Am I thinking of that correctly?
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Old 10-01-2012, 07:48 AM   #14
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Just to be clear, you cut the bottom out of the baffle, not the plastic pod.
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Old 10-19-2012, 04:48 PM   #15
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Quote:
Originally Posted by _3m View Post
you'll need the slims, you wont be able to fit the regular sized unit in behind the grill's, both front and rear. and good luck with the front drivers side, you'll be swearing a lot as you take apart the dash to pry out the speaker enclosure. good luck
That was the exact answer I had been looking for.

Bummer...

I really wanted the non-slim versions. Oh well...the search continues.

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