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Old 08-15-2014, 09:48 AM   #1
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New Speakers

Ahhhh what a difference! I went with Polk all around. DB651's for the rear and DB6501's in the front. I stuffed the sound bar and front boxes with PolyfI'll and boy what a hugE difference. I can actually here the bass lines now and the high frequencis are so much more precise and vivid.

Although the volume still sucks but not after today. I have a new amp at home that I will be installing tonight along with a 10 inch sealed enclosure. I ran all new speaker wires yesterday so all I have to do is hook up power and a remote wire then I'll be crusin'. Finally I will be able to hear my music with the doors off and freedom panels out.

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Old 08-15-2014, 11:08 AM   #2
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Chrysler for as long as I can remember and this goes back to a 1977 Plymouth stationwagon has always had the best stock stereo systems.

I ran my 07 with the stock system subwolfer and all, never replacng it and enjoyed it.

I was disappointed with the 730n and speakers in my 2013 in comparison to the one in my 07. I bought some Kickers for the sound bar, it's much better now.

I can only imagine what your's sounds like!

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Old 08-15-2014, 03:50 PM   #3
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I almost exclusively listen to podcasts and I've somehow damaged one of these POS factory speakers. They're utter trash.

I'm thinking about putting some Infinity Kappas in the bar for starters.
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Old 08-15-2014, 04:09 PM   #4
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I can't wait to replace the factory speakers when I sell my hard top. Or will I buy new tires instead?
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Old 08-15-2014, 04:14 PM   #5
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I did Polk speakers myself. DXi650 and DXi6501 in my case along with an amp and small sub and this is stereo kicks butt now, couldn't be happier with it.
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Old 08-16-2014, 04:18 PM   #6
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Originally Posted by drev500 View Post
Ahhhh what a difference! I went with Polk all around. DB651's for the rear and DB6501's in the front.
How did you mount the DB651? OEM grill or had to use a the Polk one? What mounting bracket did you use? DYI (by sacrificing OEM speaker) or something different.

I am vacillating between DB651 and DB651s. I know people have said that the 651s fits with the OEM grill, but it does have slightly lower specs than the 651. I know, I know, it is idiotic to obsess over few Hz in a open-top noisy vehicle, but that is me...

Never mind, found my answer in a different thread. If you sacrifice the OEM speakers to make a DYI mounting bracket you can retain the OEM grills. Off to eBay to order a pair
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Old 08-21-2014, 05:08 PM   #7
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Originally Posted by drev500 View Post
Ahhhh what a difference! I went with Polk all around. DB651's for the rear and DB6501's in the front. I stuffed the sound bar and front boxes with PolyfI'll and boy what a hugE difference. I can actually here the bass lines now and the high frequencis are so much more precise and vivid.

Although the volume still sucks but not after today. I have a new amp at home that I will be installing tonight along with a 10 inch sealed enclosure. I ran all new speaker wires yesterday so all I have to do is hook up power and a remote wire then I'll be crusin'. Finally I will be able to hear my music with the doors off and freedom panels out.
Hey Drev,

I am looking to replace my speakers with the same DBs you put in.
What amp did you use with the DB65051 and DB651s?
Did you use a seperate amp for the sub (what sub did you get?)
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Old 08-22-2014, 02:07 PM   #8
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I'd sure like more info on this .....

I actually upgraded all 4 door speakers of my '07 Jeep Patriot Sport 4x4 a few years back, because the standard factory stereo was pretty bad.

A lot of people recommended the MOPAR / Kicker upgrade speakers both for the better sound quality AND easy installation, so I bought 2 pairs of those for it. The difference in the size of the magnets on the back of the stock speakers vs. the Kickers were *amazing*. It was obvious just from that, plus the poly vs. paper cone, that it was a big upgrade.

But now I have a '14 JK Rubicon Unlimited with the supposed "premium Alpine" speaker system, and I'm less sure if the same speakers are worth buying for it? I've read mixed reviews. Some people rave it sounds WAY better in the soundbar. Others say it's about the same as stock on the newer premium stereos so don't bother.


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Originally Posted by Boothill View Post
Chrysler for as long as I can remember and this goes back to a 1977 Plymouth stationwagon has always had the best stock stereo systems.

I ran my 07 with the stock system subwolfer and all, never replacng it and enjoyed it.

I was disappointed with the 730n and speakers in my 2013 in comparison to the one in my 07. I bought some Kickers for the sound bar, it's much better now.

I can only imagine what your's sounds like!
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Old 08-22-2014, 02:38 PM   #9
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But now I have a '14 JK Rubicon Unlimited with the supposed "premium Alpine" speaker system, and I'm less sure if the same speakers are worth buying for it? I've read mixed reviews. Some people rave it sounds WAY better in the soundbar. Others say it's about the same as stock on the newer premium stereos so don't bother.
For the soundbar, go with a 2 ohm coax that has an efficiency of 93db or better and you will definitely notice a huge improvement. If these specs are ignored, you get less than the desired results.

If you use a 4 ohm speaker, you will cut the amplifier output in half and any loss of efficiency is less output. We don't have a ton of power to begin with... Every 3db improvement in efficiency is like doubling the amplifier output.

There are only 2 brands/speakers that I know of that meet these specs:

The Infinity 6032si and the JBL P662s. (I used the Infinity on my '12 - significant improvement)

Ignore the brand A vs brand B vs brand C argument in this case, we don't have enough amplifier power to make it worthwhile.
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Old 08-27-2014, 02:14 AM   #10
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If you use a 4 ohm speaker, you will cut the amplifier output in half and any loss of efficiency is less output. We don't have a ton of power to begin with... Every 3db improvement in efficiency is like doubling the amplifier output.
I understand an appreciate the mathematical argument of 2 Ohm vs. 4 Ohm. Today I installed a pair of Polk DB651 in the soundbar. I did a subjective test of sound level before/after replacement. If anything the 4 Ohm Polks sounded slightly louder. This may be an acoustic illusion and the Infinity is really that much better.
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Old 08-27-2014, 08:54 AM   #11
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I understand an appreciate the mathematical argument of 2 Ohm vs. 4 Ohm. Today I installed a pair of Polk DB651 in the soundbar. I did a subjective test of sound level before/after replacement. If anything the 4 Ohm Polks sounded slightly louder. This may be an acoustic illusion and the Infinity is really that much better.
It is probably not an illusion, I suspect that is the increase from efficiency. If the Polks are 3db more efficient than the stock speakers they would be just as loud and sound better (huge quality improvement).

Remember, 3 db efficiency is like doubling the amplifier output and going 4 ohm instead of 2 is like cutting it in half. Since I suspect the efficiency is MORE than 3db better than the factory speakers, it should play louder and sound better.

But that brings me to the focus I have had on optimization. We have an amp that isn't all that strong to start with. By maximizing both output and efficiency, we get "more" results.

I've heard a couple of the Infinity upgrades, I'm wanting to hear a Jeep that tried the JBL's. I'm actually a big Polk fan, I just wish they had a 2 ohm offering.
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Old 08-27-2014, 09:44 AM   #12
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Originally Posted by GroovyGeek View Post
I understand an appreciate the mathematical argument of 2 Ohm vs. 4 Ohm. Today I installed a pair of Polk DB651 in the soundbar. I did a subjective test of sound level before/after replacement. If anything the 4 Ohm Polks sounded slightly louder. This may be an acoustic illusion and the Infinity is really that much better.
The polks are actually slightly more efficient than the infinitys are so even though the infinitys are 2ohm they end up being just about the same as far as output goes.
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Old 08-27-2014, 10:07 AM   #13
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The polks are actually slightly more efficient than the infinitys are so even though the infinitys are 2ohm they end up being just about the same as far as output goes.
The DB651's are actually 92db vs the 93db on the Infinity's, so the Polk's are a little less efficient and cut the amp output in half. I estimated the stock speakers to be 87-88db (I didn't properly test prior to removal) so the Polk's easily overcome the 4 ohm deficit using efficiency. However, the simple math works in favor of the Infinity and JBL 2 ohm speakers. I do acknowledge, sometimes it's not as simple as simple math...
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Old 08-27-2014, 10:30 AM   #14
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The DB651's are actually 92db vs the 93db on the Infinity's, so the Polk's are a little less efficient and cut the amp output in half. I estimated the stock speakers to be 87-88db (I didn't properly test prior to removal) so the Polk's easily overcome the 4 ohm deficit using efficiency. However, the simple math works in favor of the Infinity and JBL 2 ohm speakers. I do acknowledge, sometimes it's not as simple as simple math...
The inifinity are rated at 93db @ 2.83v. The polks are confusing as crutchfield rates them at 92db @ 1w whereas the polk website just says 92db. These ratings are NOT the same. 93db @ 2.83v is equal to 87db @ 1w @ 2ohm. Lets say for the sake of argument that the polks are actually 92db @ 2.83v. This equals 89db @ 1w @ 4ohm. So lets say the stock head unit outputs 20w @ 2 ohms. At 4 ohms it will put out 10w. Here is what the output would be:
Infinity Polk
87db 89db 1w
90db 92db 2w
93db 95db 4w
96db 98db 8w
99db 101db 16w
102db 104db 32w


So the closest comparison without clipping the amp too bad would be 99db @ 16w for the infinity and 98db @8w for the polks. So the inifnitys have a slight edge due to the increase in power, but I would say they are pretty even.

If the polks were rated at 92db @ 1 w as crutchfield states then the output would be:
Infinity Polk
87db 92db 1w
90db 95db 2w
93db 98db 4w
96db 101db 8w
99db 103db 16w
102db 107db 32w

Here the polks have the slight edge. So it is hard to tell from the ratings since manufacters tend to use the one that makes them look the best. I would say that 1-2db difference that the speakers are about the same. Either one will definitly be an improvement over stock.
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Old 08-27-2014, 10:50 AM   #15
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The inifinity are rated at 93db @ 2.83v. The polks are confusing as crutchfield rates them at 92db @ 1w whereas the polk website just says 92db. These ratings are NOT the same. 93db @ 2.83v is equal to 87db @ 1w @ 2ohm. Lets say for the sake of argument that the polks are actually 92db @ 2.83v. This equals 89db @ 1w @ 4ohm. So lets say the stock head unit outputs 20w @ 2 ohms. At 4 ohms it will put out 10w. Here is what the output would be:
Infinity Polk
87db 89db 1w
90db 92db 2w
93db 95db 4w
96db 98db 8w
99db 101db 16w
102db 104db 32w


So the closest comparison without clipping the amp too bad would be 99db @ 16w for the infinity and 98db @8w for the polks. So the inifnitys have a slight edge due to the increase in power, but I would say they are pretty even.

If the polks were rated at 92db @ 1 w as crutchfield states then the output would be:
Infinity Polk
87db 92db 1w
90db 95db 2w
93db 98db 4w
96db 101db 8w
99db 103db 16w
102db 107db 32w

Here the polks have the slight edge. So it is hard to tell from the ratings since manufacters tend to use the one that makes them look the best. I would say that 1-2db difference that the speakers are about the same.
I would agree, if we knew for sure that they Polks were rated at 1w/1m since most manufacturers are now using the 2.83v method. Other than Crutchfield which simply says 1w (where did they get that?), I cannot find anything else that clarifies the rating on the Polk's as 1w/1m. Don't get me wrong, I am a Polk fan... I just don't know that we have the data to verify.
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Old 08-27-2014, 11:04 AM   #16
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I would agree, if we knew for sure that they Polks were rated at 1w/1m since most manufacturers are now using the 2.83v method. Other than Crutchfield which simply says 1w (where did they get that?), I cannot find anything else that clarifies the rating on the Polk's as 1w/1m. Don't get me wrong, I am a Polk fan... I just don't know that we have the data to verify.
I would agree. I bet the polks are actually 2.83v which is why I included that chart first. Crutchfield probably pulled the specs from their site and decided to fill in the blank themselves. Not trying to dispute anything you said, just pointing out that you can't just assume the higher number is better. You can see that the polks and the inifnitys are actually quite close despite the polks using half the power. Either would be a fine choice, though as you have said it is typically better to match the ohm rating of your amplifier.
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Old 08-27-2014, 11:23 AM   #17
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I would agree. I bet the polks are actually 2.83v which is why I included that chart first. Crutchfield probably pulled the specs from their site and decided to fill in the blank themselves. Not trying to dispute anything you said, just pointing out that you can't just assume the higher number is better. You can see that the polks and the inifnitys are actually quite close despite the polks using half the power. Either would be a fine choice, though as you have said it is typically better to match the ohm rating of your amplifier.
That's what is great about this forum, we may not always have the exact data we want, but we can draw from experience and knowledge that other members have and apply it as we see fit.

Cheers!
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Old 08-27-2014, 11:41 AM   #18
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Going to read this thread a couple of more times...my brain hurts.

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