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Discussion Starter · #1 ·
Figured I would do a write up and make it as detailed as possible so that people see how to upgrade their 4x6" speakers to 5.25" up front in their TJ. This is a decent improvement over the stock speakers when done and I was very pleased with the end result. The main issue with the stock speakers was that as soon as I turned up the music a bit up, the fronts would rattle this was because the screws were loose and the speakers just plain sucked for any decent music output.

It is a fairly straight forward procedure but it does involve some cutting on a little bar inside the dash as the 5.25" speaker is oval so its not a simple plug and play. This guide is good for 97 to 06 year TJ's.

This install took ~2hours and I took my time and I even had a bite to eat in between.

Tools needed:
Philips Screw Driver
Allan Head Screw Driver
Pliers
Wire Strippers
Dremel or some sort of hack saw in order to cut steel beam - Dremel recommended
5.25" NalinMFG speaker adapters
PolyFill
5.25" Speakers of your choice

*****
Another member mentioned that he used 18 gauge tin-snips to cut the steel beam off instead of using a dremel. So if you don't have a dremel guess you can try tin-snips.

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
*****

There is a variety of adapters plates online and they range from 10-20$. I really did not want to go with some plastic ones due to maybe cracking or rattling so I opted to go with the NalinMFG. I had previously read some good reviews about them and figured why not give them a try considering they are 14g CNC laser cut steel. These plates will also fit ANY 5.25" aftermarket speaker. The quality of these adapters is really superb and solid. In your package you receive two (2) adapter plates(driver & passenger), (8) #8 machine bolts, and (8) #8 nylock nuts. and you really can't beat the price of $14.99.

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Procedure:
Okay, here we go.

1) Start of by removing the 2 Philip head screws

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2) Once removed you will find your speaker setup. As you can see from my pictures this was quite a ghetto setup. Remove the 4 or however many screws hold your speakers.

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3) Once the speaker is removed, you will be left over with other adapters/random stuff perhaps like me. I removed everything and just left the bare steel framing there. Because the NalingMFG adapters bolt straight into the steel frames holes you don't need any of this extra stuff.

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4) This is the tricky part, this is what you want to cut as much as possible off in order to fit the speakers in. It's quite heavy steel so get your dremel out and start cutting. This was the longest part of the entire upgrade. And I highly recommend to use the dremel as it makes the job fairly easy. It was a bit hard getting the dremel in there due to space constraints but I managed. Also I did remove the glove compartment to make things easier.

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You also might want to put something in the rear because there will be sparks flying, I had this towel lying around, soaked it a bit with water and covered the rear so no sparks would get anywheres and damage anything.

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Once you cut one part off you can easily bend it at the upper portion, this will make it a lot easier to get to. Also you can probably just cut a bit at the top and wiggle it until it breaks off if your in a hurry. Here is a picture of the bottom all cut.

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5) This is what the end result should look like when you finish taking the bracket off.
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And here is how much I actually cut off from the actual steel framing. I had no issues fitting the speakers in afterwards.

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6) After this it's pretty straight forward and you just have to attach your speakers to the bracket and screw the bracket on and connect the wires.

Here are the speakers that I had picked up online. They are Polk Audio DB521 5.25". They came with screws but I did not have to use them at all. The nice thing with these speakers is you can move the tweets around and position them at different angles of your liking.

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7) Use the screws provided that came with the adapters plates to attach your speakers to the plate itself.

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8) After the speakers are mounted, you want to connect the speakers to your existing wires. IMPORTANT: Usual colour code is the wire that is striped (red/white) is the (+) and the solid colour wire (white) is the (-), you don't want to flip the polarity on the connections you could ruin your speakers. If your not sure what's what, before disconnecting your old speaker look carefully and you should see a small (+) and (-) on the board so make notice of that.

The speakers I bought came from a 04 TJ so they already had the pigtail on them for straight connection, but I just cut those off and spliced in the wires.

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If your upgrading in a newer TJ, I guess this would of been just straight plug and play setup.

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9) Start sliding in your speakers into the hole and it should be a easy fit if you have removed enough from the steel frame.

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And here is a picture of the speakers actually mounted on the frame. Nice and tight and there should not be any rattling.

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Optional: Polyfill

I read online that polyfill helps with keeping the sound waves from bouncing around. Especially since the TJ is not that great of a vehicle for sound any little bit helps. You can pick up polyfill at walmart and it was like $5. I just kept stuffing it in until I noticed it was getting really full back there.

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Conclusion and Thoughts:
Overall this upgrade cost me just under $80 for the speakers and the plates. Personally think it was well worth the price especially since we all listen to music on a daily basis in the Jeep. Driving the Jeep earlier tonight I noticed it sounded a lot more balanced inside and almost as fell I was being hit by music all around me and not just coming from the sound bar.

The NalinMFG Adapters were wonderful and of high quality and they were designed to be a perfect fit. I would highly recommend these for anyone planning on doing this upgrade. :2thumbsup:

And here is a couple of images from the finished product. If you have any questions or if something is not detailed enough please let me know. Cheers.

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Discussion Starter · #3 ·
Great write up! I just did the same thing to mine, except I was able to bend and move the support beam enough to get my kickers to fit, one question, do you have anything keeping the polyfill up? Or does it just hold istelf up? I stuffed my soundbar with polyfill, but would like to put some up front as well.

Also, great choice with the polk DB's, I love my 651's in the soundbar!
Thanks! Yah the DB's are a nice speaker for the price.

The Polyfill is held in place by itself and since I pressured it in. No idea if its going to stay in place by itself only time will tell but I don't see it falling off. The stuff is somewhat thick and sticks together. Walmart had a bag of polyfill but it was way too much for this application, what I did was buy a smaller sized pillow and just cut it open and took the stuff out of it lol :rofl:
 

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Discussion Starter · #8 ·
MountainMan864 said:
Will the stock speaker covers fit with the new 5.25 speakers.
The stock speakers are not 5.25", to my understanding all tjs come with 4x6" speakers.

For the Polk speakers I got the covers wouldn't of fit onto the speaker as space is pretty tight, unless the cover is really flat you might be able to squeeze them in.

JLITTY said:
awesome! I got a set of those adapters myself, they are pretty sweet.
Totally agree the adapters are of excellent quality and no rattling. For the price they are worth every penny and the upgrade sure adds to the music touch in the jeep.

Highly recommend the polyfill also.

Sent from my iPhone using JeepForum
 

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Discussion Starter · #11 ·
Yes, just cut away that vertical metal braket, or bend it enough so that the speaker tucks into the dash more. I was able to fit my Kickers in there no problem, and the stock covers fit nice and flush. Nice stealth upgrade:thumbsup:
Must be a tight fit tho? Any benefit to actually putting the speaker covers over?

I left mine just the way the pictures show never used the speaker covers that came with it.
 

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Discussion Starter · #13 ·
Quick question, how exactly do you disconnect the old wires and then connect the new wires?

I realize this is extremely basic, but it's the only part I'm not clear on...

Thanks!
Well my previous speakers had these little guys on them.



All I did was unplug those, then cut off the connectors (whit ones in picture) that came on the new speakers and just spliced a new set of the ones in the picture for an easy connection.
 

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Discussion Starter · #23 ·
4x4Brit said:
I ended up buying the nalin plates and 4x5.25 Polks just recently. I am new to installing car audio and I'm wondering what is the easiest way to wire these speakers. Snip the factory plug and solder to the posts on the Polks? Or use some other kind of connector?

Thanks.
Whatever you feel comfortable with, I spliced in the connectors as shown on the pic above and then just slid then over the posts. Soldering is good idea but if you ever decide to remove them then you gotta break the connection.

I find the posts on the speakers sometimes are not very strong/heavy duty so breaking the post off trying to take wire off could cause some damage.

You can always solder the actual connector to the wire then still use connector over posts for easy removal down the road. At the end tho it's all your call :)
 

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Discussion Starter · #26 ·
02WranglerTJ said:
NIce write up! I got really lucky and had the 7 speaker system. I didn't even have to do the metal trimming, great fit!
7 speaker system makes quite a diff in the ti! Always thought about adding that sub in the console but never got around to it.

4x4Brit said:
So ended up using female spade connectors crushed onto the wire after snipping the factory plug off. So far, so good. And like the previous poster, I also didn't have to cut anything. The Nalin adapters work nicely.
Both you guys must have newer TJs then? I think pre 02 has to cut the dash part of like I showed.

Don't forget to add polyfill!!!
 

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Discussion Starter · #37 ·
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.

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 :thumbsup:

Great write up and good idea on the poly
Thanks! Glad it's helping others out. :cheers2:
 

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Discussion Starter · #38 ·
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 :highfive:
 

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Discussion Starter · #42 ·
BamaJeepman21 said:
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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Discussion Starter · #57 ·
Yep. 6.5" Polk Slim mounts fit just fine in the 97-02 soundbar. The stock grille fits perfect.

I've had my system here since Tuesday but have yet to put it in. Only tested if the speakers would fit. Maybe it has something to do with the $200 quote a shop gave me to install everything. :rolleyes:

...and I really don't want to do it myself.
No need for the shop to do it, to install that system you don't even need any special tools.

Considering the TJ being so accessible with no hidden things you should be able to run the wire inside the roll bar padding and everything look proffessionaly done. Probably take you a day to do while having a few beers.
 

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Discussion Starter · #60 ·
That was an awesome tutorial. Well done! Where can I buy online the NalinMFG Adapters? I live in the gulf so I doubt there are any
stores over here that have them. So would have to order online and have em shipped. Also there is no wallmart here
so what is another word for polyfill or description of it so I can search here.

Thanks
Thanks! I figured it was time I gave back to the community as I received lots of information on this forum myself and saved myself a lot of $$$ with different projects.

Get the adapters from http://www.nalinmfg.com/TJ-525-Speaker-Adapters_p_8.html

It's a great price and he will have them shipped straight to your door :)

About the polyfill, take the pillow you sleep on and cut it up ;) hehe just kidding. You can pretty much find that stuff in any pillow, just go to a store that sells pillows and find the cheapest one and tear it up to get the stuff. Also it doesn't need to be a big pillow, something small will do.
 

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Discussion Starter · #65 ·
More great info. Use a pillow. got it.

Has anyone put the 6.5" into the soundbar and still used the factory cover with dome light. I saw the picture in
this thread but they just have the speaker exposed with no cover or dome light. I want to use my cover with dome
light. Is this possible?
Can't help you with this, sorry. I think the actual factory cover is not deep enough to fit over the 6.5" speaker so you might have to use the cover for the new speakers you buy usually speakers you buy come with their own covers but you will lose the dome light.

Again not 100% sure on this.

When you talk about wiring and splicing did you cut the existing wire to the old speaker
and put that red clip on in the picture to connect to the new speaker? Is that what you mean
by splicing?
Yes that is correct. The speakers I bought were previous installed in a 2004 Jeep, the newer jeeps have nice connectors on them so if you have a newer Jeep you could of just plug these in.

Since mine is a 97 it didn't have the nice connector, I just cut the white connector (on speaker) off and connected some wire with the red connector to plug onto the speaker.
 

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Discussion Starter · #85 ·
Nicely done esad_b with the pics and explanation. My brackets have arrived from NalinMFG and I'll be installing my new speakers tomorrow. Your thread here will really help make my install easier.
Thanks a lot! its a fairly straight forward install, the hardest part is probably cutting that beam off unless you have a newer TJ than your all set.

It certainly make my life easier!

Your thread is more detailed than any instructions I could ever hope to include. Not only does it have step by step photography, but viewers are able to get instant input from hundreds of other people that have already performed the installation.

:thumbsup:
Haha no worries Nalin! Glad to give back to this forum, it's saved me a few hundred dollars from some of the DIY's and tips that I used. :cheers:

It's a great thread, coupled with a great product/company. Glad I was lucky enough to come across it (the original Nalin thread).
No doubt its a great product. They have plastic ones on crutchfield as well but I've heard the quality is junk and they tend to rattle. So I knew it wasn't worth my time and that I should give the Nalin ones a go.

The Nalin adapters are an amazing product and quality. :thumbsup:
 

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Discussion Starter · #105 ·
dougiefresh131 said:
How much of a difference will the DB521 make over Polk 4x6's?
Also, if I were to go with the DB521 up front and the DB651s in the soundbar, would I need an amp? I currently have a JVC KD-HDR70 headunit (MOS-FET 50W x 4 (20W RMS x 4)). Would you recommend running new wire to the speakers or is the stock wiring sufficient?

I am also looking to add a sub since there is 0 bass in my current set up. I only want some bass. I'm not looking to shake my whole jeep apart and I don't to spend a lot of money. I don't want to put anything behind the rear seat, or in the bottom of it. I've seen some center console subs (my center console did not come with a sub) and I think I want to take that route. I saw someone with the Sound Ordinance B-8PT http://www.crutchfield.com/S-wphI5kufksZ/p_777B8PT/Sound-Ordnance-B-8PT.html. I like it because it has a built in amp. I also saw something where a guy cut a hole in the side of the plastic liner of the console and mounted a 6.5" sub directly to that and sealed the top with a piece of plywood.
Any 4x6 speaker just doesn't have enough kick in it for you to notice the particular speaker upfront. The 5.25 however does somewhat and you can hear the different between the two speakers.

There is consoles that came in jeeps that had the 7 speaker setup from the factory which had the sub right inside the console. I've seen a guide on here before how a guy turned his ordinary console into a sub one. Or you can just look on the classifieds and find a console that is sub ready?

I do know that the stock sub in the console is not that good tho and also recall seeing a thread of how some members actually upgrade the stock sub from the console to something aftermarket.

Also you wouldn't need an amp if you were to upgrade your front and rear speakers. I have 5.25 upfront and 6.5 in the rear, no issues and for me it sounds great.

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Discussion Starter · #109 ·
An amp makes ALL the difference in the world. I have a small amp (KTP-445) that only puts out 45 watts RMS per channel but it made a HUGE difference in my 5.25 / 6.5 Polk combo. If you drive with the top and/or doors off above 35 MPH you're really going to need an amp. Even at low volumes it made a big difference in mine. The stock head unit sounded like crap through nice speakers. I tried it but didn't tolerate it long at all.
I get that an AMP would make a difference, but I think his actual question was more along the lines "does he NEED an amp to run these speakers.."

But I'm sure an AMP would give it that extra kick, especially on top/door off days.
 
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