: Changing stock sub/sound system

12-14-10, 01:17 PM
I have looked all over the place to find out what size the stock subwoofer is in a 2002 Escalade. The reason I am wondering is because i would like to replace the stock sub in order to keep a system hidden and out of they way. Has anyone done this or would you know anything about this. I am guessing the sub is an 8" but I can't find it in any owners manuals, etc. so that I can further research my options as to how I can try to get this done. Any information, or help/advice, please let me know so I can try this soon. Thanks guys.

12-14-10, 11:02 PM
I think you would be better off adding a powered sub or sub/amp to add bass. If you are not happy with the bass of the stock sub then you will need more power. I wouldn't try to add an amp to a sub in the stock spot. That will likely just rattle too much unless you do a good dynamat job. Infinity basslink would be a cheap way to add some good clean bass and not take up much space. Also, I think you can get a "custom" box that fits under the rear seats.

03-01-11, 07:16 PM
This might be too late... But I am installing an MTX thunderform enclosure right now, it doesn't have the amp built in, that would have made it a lot easier, since now i have to find a place to install the amp.

03-01-11, 10:55 PM
This might be too late... But I am installing an MTX thunderform enclosure right now, it doesn't have the amp built in, that would have made it a lot easier, since now i have to find a place to install the amp.

I had MTX sledgehammers (7500 series) in my 04 escalade. It's pretty easy to install to the stock system. I bolted my amp to the back of the speaker box. Never had problems with it and it was pushing 900 amps rms (never overheating). Had to remove the 3rd row seats but I never used them anyway. I really didn't understand your question but I think you were just asking where to install the amp.

03-03-11, 08:54 PM
It sounds like you want to replace the stock subwoofer. The stock subwoofer isn't a standard size OR shape. You can't swap them out. You'll either 1. need to throw something in the back like most people do, 2. get one of the custom fit enclosures to go under the seat or in the rear on the side, or 3. have something custom built.

03-11-11, 01:52 PM
I was going to recommend the MTX which is what porta got. Personally the best solution would just to get a sub box and new sub. It does take up some room, but is totally worth it. A great place to put the amp is under the rear seats. Plenty of room and looks great once completed.

03-11-11, 02:34 PM
Pictures pleeeesae!

03-11-11, 04:16 PM
I have a single 12" sub in the back. I took out one of the 3 row seats since i rarely have that many people. Here's a pic of the sub, and the two amps under the second row.

03-21-11, 11:20 AM
So, My install is complete, i installed the MTX thunderform and it looks good (you don't see it at all other than the speaker through the grill), sounds better than I thought, but isn't up to my normal standards (I had 4-10" Kicker solo-baric L7's in my suburban... Definately a bit of a downgrade...Haha) It is sound way better than the stock sub. I will try and get a couple pics taken tonight...

03-21-11, 12:58 PM
Is it possible to fit a 12" sub in while still retaining the back seats? The reason I ask is because I just bought a 12" JL W3 for $15 from a friend who had used it for 1 month a long time ago and didnt re-install into a new truck. So if possible I would like to use this, but I want to keep my seats as well. Anyone know if this is possible?

03-25-11, 07:59 PM
You could always fiberglass it! Then that 12 would definitely fit. If you're just talking about a box to sit back there, it should also still fit.

03-29-11, 12:50 PM
Okay, did anyone have any problems with alternator noise when using a aftermarket 4 channel amp and the factory radio? I learned that you can't really use the line out converter at the bose amp because every channel is crossed over. To add to the mess your signal coming out of the head unit is a common ground and already a low voltage input meaning you don't need a line out converter. So I spliced some nice rca's straight into the front channels using the same ground for the left and right channels, but i'm getting alternator noise and it's killing me. My 4 channel is only running the doors. I left the bose amp to run the tweeters in the A pillars, the center speakers below the center console and the rear speakers in the back pillars. There's no way a 4-channel amp is going to run all those channels. Don't get me wrong it sounds great and is loud as hell, except for the noise. I did add a Kicker KQ9 EQ to add the ability to change the sound beyond the stock head unit. I ran zero gauge to under the second row seats and split it off to 4 gauge to both of my amps. I'm running an Alpine 1000 watt RMS and Hifonics 800 watt 4 channel amp. I disconnected the factory sub and have a pioneer premier sub in a Bass Pro Box. The sub can handle 3500watts max and hits lows like you won't believe (12 inch). I just can't get rid of this damn noise. I also isolated the remote from the remote coming out of the head unit using a relay switch, grounded the EQ to the chassis, grounded the negative battery terminal to the frame using 0 gauge. I'm not sure what else I can do. I don't want to use a noise filter. That takes away from your sound quality.

03-29-11, 12:54 PM
Sorry dude, didn't mean to write a book on your post. But to answer CEPMAN. You have no problems, My box is a whopping 2 cubic ft and fits with the third row. You can get one half the size and be good. My seats will go in, but the back of them won't lock back which is fine with me. Guess whoever sits in the third row will have to sit straight up with some earbuds and a bottle of Aleeve.

03-29-11, 07:49 PM
here u go.

03-29-11, 09:40 PM
I have an aftermarket head unit and the official GMOS piece that is supposed to be used to interface with the stock amp, and I STILL have a little alternator noise. I think the only way to get rid of it is to bypass the pactory amp. I've been 'meaning' to tackle this for over a year now - just kinda never got around to it.

03-30-11, 07:15 AM
Kenwood DD, gmos, steering wheel control, 2 12's on a mono 1000 rms at 2ohms and factory amp untouched. Sounds great. No alt noise what so ever. I am however splicing into the factory amp as we speak to add in F & R components. I've been driving around with sliced wires on the amp and still no interference. Maybe its the way you ran your wires for the after market subs.