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Topic Review (Newest First)
03-01-2012 07:21 PM
TJe0454 i have 2 of the polk dxi 104 subs. they put out a ton of sound. highly recommend
03-01-2012 03:24 PM
LilYeller www.the12volt.com

By far the best resource for wiring audio/security in vehicles. I use it all the time, best of luck to ya!
03-01-2012 03:17 PM
TheTJRod The DVC 4ohm sub can be wired as 8 ohm or 2 ohm. More power output at 2ohms.
Subwoofer Wiring Diagrams, One 4 ohm Dual Voice Coil (DVC) Speaker

Here is a good read on getting picking the right amp.
How to Match a Subwoofer and an Amplifier

Using a 2 channel amp will get you 8ohms. Using the mono amp will get you 2ohms. The mono amp is ideal for a 4ohm DVC wired as a 2ohm load.
03-01-2012 02:43 PM
TheTJRod I mispoke. Use a 2 channel or the mono amp. The 4-channel is good for running 2 subs, or your 4 other speakers. I read through the manual for that amp and that is what I got from it.
03-01-2012 01:51 PM
TheTJRod Found the sub on amazon for 40.
Amazon.com: Polk Audio 12" Dual-Voice-Coil 8-Ohm Subwoofer - Black: Electronics

Yea, you would think that polk would match their own speakers a little better though. That amp will work for the sub. If you want to run only one amp for all your speakers you will need something bigger. Or you can get two of these, one for the sub and one for the 4 speakers.
03-01-2012 01:31 PM
Sammy91683 Ok so if I were to get the Polk Audio 12" Dual Voice Coil, then I should get a 600W amp like this one?
Polk Audio - 600W Class AB Bridgeable 4-Channel MOSFET Amplifier with Switchable Bass Boost - PA 660
Sorry, I'm a die hard Polk fan. I absolutely love everything of theirs.
Since the sub has a 720W max, then I wouldn't have to worry about blowing it with the 600W amp. Am I correct?
03-01-2012 01:25 PM
TheTJRod If you want to keep with polk speakers here's one that would be good.

DXi124 dvc
Polk Audio - 12" Dual-Voice-Coil 4-Ohm Subwoofer - Black - DXi124 DVC
03-01-2012 01:10 PM
TheTJRod
Quote:
Originally Posted by Sammy91683 View Post
Also, do you say single or dual voice coil?
For a single sub go with a dual. It allows a lot more control over power vs quality. Lets you change from a 4ohm sub to a 2ohm sub just by swapping the wires around. 4ohm sounds better while 2ohm puts out more power.

Edit: Also realize this will effect what amps you can get. Make sure both the 4ohm RMS and 2ohm RMS is less than or equal to your sub. To prevent you from turning it all the way up and instantly blowing it out.
03-01-2012 01:06 PM
TheTJRod I looked at your radio and it puts out 22w RMS per channel. The RMS rating is the only number that really matters when matching amps and speakers. I don't care about the max rating, it can only handle that much for a very short time or gets damaged. Also practically every max rating is grossly exaggerated and all just a marketing scheme.

Your 6.5" can handle 60w RMS and your 4x6 45w RMS. Looks like you can double your power without damaging your speakers. You freq range is 85Hz-22Hz, a sub will fill out the lower ranges. Since you have nice speakers to get the most out of your system you can run a 4 channel amp for all the speakers and a sub amp.

You can get poly fill at Hobby Lobby or Michael's, stuff that behind all your speaker will help with the sound.
03-01-2012 12:38 PM
Sammy91683 Also, do you say single or dual voice coil?
03-01-2012 12:37 PM
Sammy91683 Thanks. Ya, I've tried so many things. The dynamat has worked the best. My head unit puts out 50W for 4 channels.
Here are my speakers:
DXi Series - Your Ride Our Sound
DXi Series - Your Ride Our Sound
03-01-2012 12:31 PM
TheTJRod Do you have the model numbers for the speakers. If they can handle over 50watts RMS then you can add an amp to get them more power. Most head units put out 35-50watts per channel.

Our jeeps have very little plastic. As long as the sub is mounted securely it won't cause much rattling. You should try getting sheets of rubber and cutting them out to fit under the light cover. Try finding a sub box for a 12"(a 10" will work too) and look for around a 400-600watt RMS amplifier. I run an 8" but I just want to hear the lows, also mine is less than a foot away so I don't need as much.
03-01-2012 12:20 PM
Sammy91683 Ok. I have polk 6 1/2s in the soundbar and polk 4x6s in the front dash. Ummm, I want a good rattle, but to where it still sounds good. I know some people that have subs so powerful to the point where it's like oh my god, I can't breathe. I would prefer to still be able to breathe. Also, my rollbar speakers cause a rattle in the soundbar because the domelight is the worst design ever. Whoever thought it would be a good idea to have several pieces of plastic very close to each other in a part of the car that will be withstanding sound vibrations sucksss. It ended up breaking anyways, so now I just have a rattling piece of plastic that serves no purpose except that it's annoying. Would the polyfill stop that? I put dynamat by it, and that helped a lot, but it's still there. Would the rest of my jeep rattle like that if I got a sub?
03-01-2012 12:08 PM
sidewalk0863
Quote:
Originally Posted by TheTJRod View Post
I probably confused you with the pre-amp outputs. But that is exactly what they are. They are meant to be connected the the inputs of an amplifer. All it is, is a unamplified audio signal. This keeps distortion out of the signal to get a clean sound to the sub.

"You will need an amp to run a sub"
thanks
03-01-2012 12:02 PM
TheTJRod OP, what model speakers do you have. I could steer you to amps that will get the max sound out of the speakers you have. Also do you want to fill out your lows or rattle your jeep. This will determine how much power and how big of a sub you will need.
03-01-2012 12:00 PM
TheTJRod I suggest against adding speakers especially if your inexperience at wiring. It is an added expense. Quality and properly powered speakers in the stock locations will give you all the high and mids most people will ever need in our small Jeeps. Add a sub that fits your taste and you will have a great full sounding system.
03-01-2012 11:56 AM
denisbaldwin You could do what I did and get the Tuffy speaker/storage boxes for the wheel wells. Fits 6x9s (which put out decent sound) and I mounted the amp into one of the boxes. Weather proof, lockable, awesome.
03-01-2012 11:55 AM
TheTJRod I probably confused you with the pre-amp outputs. But that is exactly what they are. They are meant to be connected the the inputs of an amplifer. All it is, is a unamplified audio signal. This keeps distortion out of the signal to get a clean sound to the sub.

"You will need an amp to run a sub"
03-01-2012 11:54 AM
Sammy91683 Ya I already replaced my headunit with something very similar to this.
Pioneer - 50W x 4 MOSFET Apple® iPod®-Ready In-Dash CD Deck with MP3 Playback - DEH-3300UB
03-01-2012 11:51 AM
sidewalk0863
Quote:
Originally Posted by TheTJRod View Post
You would need an amp to run a sub. Most aftermarket headunits will have pre-amp RCA outputs for subs.
so youre saying i do need one?
03-01-2012 11:45 AM
TheTJRod
Quote:
Originally Posted by sidewalk0863 View Post
i don't have a sub in my 2000 and id like to add one. i already have and alpine head unit, do i need an amp to run a sub??
You would need an amp to run a sub. Most aftermarket headunits will have pre-amp RCA outputs for subs.
03-01-2012 11:43 AM
sidewalk0863
Quote:
Originally Posted by jeepwayoflife View Post
Well more bass would deffinatly help with "fuller" sounding music. Have you upgraded your stock subwoofer if you have one?
i don't have a sub in my 2000 and id like to add one. i already have and alpine head unit, do i need an amp to run a sub??
03-01-2012 11:33 AM
TheTJRod This post should go in the "Communications and Electronics" section.

I highly suggest and aftermarket headunit/radio as that will simplify the install of extra speakers and subwoofers and will allow better control over equalizer settings. There are amplifiers that are made for running a sub and extra speakers that I would suggest.

You could wire the head unit to only handle the front speakers and use an amp to power the rollbar speakers and a sub. This would allow you to get more out of your current speakers and fill in the bass.

Check in my sig for replacing your radio.
03-01-2012 11:13 AM
Sammy91683 I have a 98. No stock sub.
Ok, that sounds good. I need to know how to wire these things though, so does anyone know? XD
02-29-2012 09:56 PM
I-Want-A-Jeep If you already have upgraded speakers, adding an amp to them will really bring them to life! Then get another amp and a sub to round out the low end.

Also, using polyfill in the speaker cavities will help with some improved sound.
02-29-2012 09:15 PM
jeepwayoflife Well more bass would deffinatly help with "fuller" sounding music. Have you upgraded your stock subwoofer if you have one?
02-29-2012 02:46 PM
Sammy91683 Ok. How would I do these things?
Ya, I have Polk 4x6s and Polk 6 1/2s in the overhead soundbar already, but i just want a fuller sound and more bass definitely.
02-29-2012 02:41 PM
jeepwayoflife Best way to do it would be to get an amp, and run speakers from that. I guess you COULD splice them off of the current speakers, but it will lower the power of both and puts more strain on your head unit. If you get an amp, mount it under the drivers seat, under the rear seat, or behind the rear seat. I mounted mine inside the little tuffy box behind the rear seat. With an amp you will have proper power to the speakers, and they arent that much money. I got a used one from my friend for $40 and its 600 watts and dual imputs As for the speakers themselves, you can get speakers made to attach to the roll bar, or build boxes for them. Best of luck! Im looking to do the same thing, because i have a subwoofer on my amp, and might take it out for 2-4 more speakers
02-29-2012 02:33 PM
Sammy91683
Wiring Sub/Amp and 2 Extra Speakers

I was thinking about getting these things and I have absolutely nooo idea how to wire them into the system. My brother will help me, but I was just wondering if there were any good write-ups or links out there that are helpful and basic. Thanks!

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