How to Speaker Upgrade Tutorial: 4x6" to 5.25" (Lots of pics) - Page 3 - JeepForum.com
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Go Back JeepForum.com > General Technical Discussions > Electrical, Audio, GPS, & 2-Way Radio > How to Speaker Upgrade Tutorial: 4x6" to 5.25" (Lots of pics)

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Unread 02-02-2012, 06:53 AM   #31
02WranglerTJ
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How much polyfill do you need?

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Unread 02-02-2012, 08:48 AM   #32
gily25
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Your goal is to break up the backwave of the speaker do enough to occupy the space behind the speaker (a lil different than packing a sub box) but loosely pushed in...not crammed in. It gets caught in the speaker basket and wiring so don worry about it falling out.
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Unread 02-02-2012, 08:15 PM   #33
AKGeo
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Quote:
Originally Posted by geocash View Post
AK - did you use the same Polk Audio speakers as shown above?
Yup. With the MTX brackets it was a tight fit to the dash frame on the passenger side but I don't hear anything that sounds like it might have a problem with contact with the speaker surround. I didn't polyfil behind them, but I might do that as well as the sound bar sometime soon to see if it offers any more sound quality. I still have to order and install an amp to drive all the speakers (also have Polk shallow 6.5's in the sound bar. I suggest the standard 6.5's unless you run a subwoofer.) and install my Kenwood marine stereo, so I'll be running new speaker wires anyway. May as well get it all taken care of at once.
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Unread 02-03-2012, 09:18 AM   #34
DanZ51
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My 04 TJ came from the PO with Alpine SPS-510 5.25" coaxials front and rear. Better than stock but 87db rating I'd like to swap out for something a little more efficient but for now these will do.

I added polyfill front and rear. The problems is I don't get much sound out of the front speakers as oppose to the rear speakers mounted in the pods. Would an (small) enclosure up front make that much of a difference?
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Unread 02-03-2012, 12:42 PM   #35
clintrivera
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More specifically the polyfill in this application is to lessen the chance that the sound from the rear of the speaker doesn't cancel out the sound from the front of the speaker. If you were able to completely "enclose" the rear of the speaker with fiberglass or something airtight you would get better bass and mid range.

You can test out the difference this makes with a home system easily. Simply reverse the wires on one of the speakers and you will know what is happening with the front speaker setup in a jeep.
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Unread 02-03-2012, 05:52 PM   #36
PCfirefighter
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Great write up and good idea on the poly
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Unread 02-05-2012, 08:15 AM   #37
esad_b
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Quote:
Originally Posted by 02WranglerTJ View Post
How much polyfill do you need?
I picked up a smaller sized pillow from Walmart cut it open. Didn't use all the polyfill either it just pushed it the back of the speakers until I noticed it was getting full.

Quote:
Originally Posted by gily25 View Post
Your goal is to break up the backwave of the speaker do enough to occupy the space behind the speaker (a lil different than packing a sub box) but loosely pushed in...not crammed in. It gets caught in the speaker basket and wiring so don worry about it falling out.
Exactly

Quote:
Originally Posted by PCfirefighter View Post
Great write up and good idea on the poly
Thanks! Glad it's helping others out.
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Unread 02-05-2012, 08:17 AM   #38
esad_b
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Quote:
Originally Posted by 4x4Brit View Post
Haven't done this yet but it's on the to do list. I'm interested to see what difference it makes.
I wish I would of taken a sound clip prior to polyfill and afterwards but I really didn't

But it just sounds deeper I know that from my previous speakers that didn't have anything back there. Plus for the $2 pillow I bought to rip the polyfill out of it it was worth it either way
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Unread 02-05-2012, 06:26 PM   #39
AKGeo
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I just stuffed some polyfill behind my front speakers...didn't notice too much of a difference but it was an old pillow that was going in the trash anyway. And I'm sure driving it on the highway will make it more noticeable. I have another pillow waiting to be used to fill the soundbar as well.
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Unread 02-18-2012, 09:49 AM   #40
BamaJeepman21
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Man this adapter sounds great. I'm extremely new to audio and I'm just plain not good at this stuff. What are some of the best 5.25" speakers? A lot of people in this thread have had to splice wires. Can you not get speakers that plug in?

How hard is it to get 6.25" speakers in the sounds bar? One said it was a pain in the *** but didn't go into detail.
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Unread 02-18-2012, 11:15 AM   #41
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http://www.amazon.com/dp/B0002BEQWK?tag=diecastpro&camp=14573&creative=327641&linkCode=as1&creativeASIN=B0002BEQWK&adid=15JM1KS3T9054TJV9Y79&&ref-refURL=http%3A%2F%2F4x4icon.com%2Foffroad%2F121606_cherokee_speakers%2Findex.htm
I recall them being cheaper somewhere else though, may try searching the part number.

The most popular speaker in my experience has been Polk's DB521.

http://www.amazon.com/Polk-Audio-5-25-Inch-Coaxial-Speakers/dp/B000P0PF8C/ref=sr_1_2?s=electronics&ie=UTF8&qid=1329588870&sr=1-2
Quote:
Originally Posted by BamaJeepman21 View Post
Man this adapter sounds great. I'm extremely new to audio and I'm just plain not good at this stuff. What are some of the best 5.25" speakers? A lot of people in this thread have had to splice wires. Can you not get speakers that plug in?

How hard is it to get 6.25" speakers in the sounds bar? One said it was a pain in the *** but didn't go into detail.
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Unread 02-18-2012, 12:50 PM   #42
esad_b
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Quote:
Originally Posted by BamaJeepman21
Man this adapter sounds great. I'm extremely new to audio and I'm just plain not good at this stuff. What are some of the best 5.25" speakers? A lot of people in this thread have had to splice wires. Can you not get speakers that plug in?

How hard is it to get 6.25" speakers in the sounds bar? One said it was a pain in the *** but didn't go into detail.
DB521 is your best bang for the buck.
The splicing of wires will be necessary as the speaker is not a stock component. It's quite easy to do nothing about it really, you can splice connectors and then plus the speakers in if it would help

6.25" speakers in the soundbar can vary because different 6.25" speakers vary slightly in size and throw stuff off and make it harder to mount. But either way you will need to make the soundbar hole a bit bigger for the speaker to fit in any case.
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Unread 02-18-2012, 02:11 PM   #43
AKGeo
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Quote:
Originally Posted by esad_b View Post

6.25" speakers in the soundbar can vary because different 6.25" speakers vary slightly in size and throw stuff off and make it harder to mount. But either way you will need to make the soundbar hole a bit bigger for the speaker to fit in any case.
Polk's matching 6.5" speakers go into the soundbar without any mods to the bar itself.
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Unread 04-19-2012, 07:34 PM   #44
axxegrinder
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Just wanted to add; I cut the bar with a pair of 18 gauge tin-snips that I paid $15 for. Just wanted to add this in case folks are thinking they need a higher priced Dremel or other tool.

- Chris
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Unread 04-20-2012, 05:35 AM   #45
esad_b
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Originally Posted by axxegrinder View Post
Just wanted to add; I cut the bar with a pair of 18 gauge tin-snips that I paid $15 for. Just wanted to add this in case folks are thinking they need a higher priced Dremel or other tool.

- Chris
I will add your comment to the original post at the very top

Thanks for the input!
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