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Discussion Starter · #1 ·
Here is my first how to so i hope it comes out well. I took numerous photos and anyone having questions feel free to ask. On with the show...
Land vehicle Vehicle Car Vehicle door Family car
Here we have our right rear door. Basic at this point.
Auto part Technology
Here's what's going in. Polk Audio components and Crutchfield speaker adapters.
Auto part
Here's a close up of the speaker adapters.
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Here's a close up of one of the two torx bolts holding on the door. They are size T15 btw. This one is in the arm rest, the other is behind a plate by the door handle.
Wire Snow Technology Vehicle Auto part
Here is the door panel removed. You can see two cables. The one with the yellow is the door latch, the other is the plug for the power window switch.
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A close up of the latch connector.
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A close up of the harness for the window switch. Push the button on the side, and it pops right off :)
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The door with the interior panel removed.
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The backside of the interior panel. You can see where the connectors are that hold it to the door.
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Here is the door speaker. This one is the Pioneer upgrade system. More to come in the next post.
 

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Discussion Starter · #2 ·
Ok, continuing on... Auto part Technology Bumper
Here is a close up of the decal on the Pioneer speaker. Some very interesting information on here. Btw, the is NO information on the back of the speaker, just this decal on the side.
Red Water Joint Wire
Since no adapters are available for the speaker connector, I had to cut the wires. I went back about 6 inches from the connector so I could re-attach it if needed.

The goal of this job was to replace the pioneer speakers with something else to hopefully even out the sound in the car. Currently almost all the sound goes through the front speakers and very little goes through the rear, with the exception of the subs. They work just fine :)

End result: NO DIFFERENCE!!! God was I disappointed! In the end, I actually put the factory speaker back in. Thinking at this point it has got to be the amp doing the splitting of power to the speakers. I'm welcome to suggestions but think the only fix will be to bypass the amp and run external amps to the speakers.

Comment away!
 
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This confirms my suspicion that the with the pioneer system, the amplifier has a high pass filter on the front and door speakers in order to limit bass to the rear 6x9 speakers.

Did you also replace the tweeters and run the included crossovers? What changes or improvements were you expecting or looking for?

Can someone get me a pinout diagram of the head unit used in both the base and pioneer head units?

Great writeup btw.

Sent from my Bulletproof_Doubleshot using AutoGuide.Com Free App
 

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Discussion Starter · #4 ·
No, with not seeing a change in volume with the rear, I held off with changing the front ones. Until I can find a fix, I'm holding off with any more upgrades. I can say this though, the rear speakers with the component tweeters were a very nice upgrade. Brought the highs out very cleanly and the were sharp and bright. Sadly, the volume level to the rear was awful, so much so that the front speakers totally wash out the rear doors.
 

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chuck5330 how difficult are the door panels to remove? Do they snap back in nice and tight after the install? How do the brackets supplied by Crutchfield fit, any problems? I finally got all my speakers in for the upgrade. Luckily I don't have the Pioneer system with the standard system can adjust the balance just fine just upgrading to a higher quality speaker.
 

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Discussion Starter · #6 ·
take the two screws out and the door panel pops off. I would suggest a panel remover tool (what I used) but if you dont have one, a slotted screw driver will work as well. They do pop off and on easily, just don't force it. Even steady pressure and it won't be a problem. Look closely at my pics to see where the plastic screws are. The brackets are an EXACT match to the factory speaker. They are awesome! FIT PERFECTLY! Best $14.99 you can spend. I highly recommend them! Funny thing, factory speaker is only held in place by ONE bolt! (9/32 btw :)) the bottom has a lip the fits inside the door and then you just lean the top in and bolt it. Super simple!
 

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No, with not seeing a change in volume with the rear, I held off with changing the front ones. Until I can find a fix, I'm holding off with any more upgrades. I can say this though, the rear speakers with the component tweeters were a very nice upgrade. Brought the highs out very cleanly and the were sharp and bright. Sadly, the volume level to the rear was awful, so much so that the front speakers totally wash out the rear doors.
So these were an upgrade to your rear door speakers? There's a very simple explanation for this. It is likely that the factory speakers are 2ohm speakers, and the Polk DB speakers present a 4ohm load. The end result is that the 4ohm speakers will actually pull half the power from the amplifier than the 2ohm speakers will, which will make them about 3db quieter. Since it take a 10db increase for the human ear to perceive a 2x increase in loudness, a 3db decrease is a decrease in volume of 30%. There's also the issue of sensitivity. From what I can tell, the original speakers are paper cones, which in general are more sensitive than the aluminum cones you have in your Polk DB speakers. If you were to play a test tone through both of them at 2.83V (which would be independent of impedance), you would probably measure a higher sensitivity with the paper cones. I wouldn't expect any different from GM; getting the most noise out of the least amount of power possible.

Install the Polks both front and rear and you'll discover 2 things:

A. It will sound great at low and "moderate" volumes
B. You'll need an aftermarket 4-channel amp to get them to play at their true potential.
 

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According to his pictures the rear door speakers say they are 6ohm.

chuck5330 yep I ordered a trim piece tool set along with the speakers and other stuff. Just need to get me a soldering iron to do the connections and wait for some somewhat decent weather and get mine installed. What size screws did you use to secure the speaker to the mounting bracket? The Polk's I got didn't include any hardware for that.
 

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According to his pictures the rear door speakers say they are 6ohm.
Just noticed that. I'm guessing the real reason behind this is the higher sensitivity.

Try running them both front and rear and see what your impressions are.
 

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Discussion Starter · #10 ·
I contacted Stacy over at Customer Care and she suggested taking it in to the dealership. She set me an appointment for Friday morning so let me see if they have any suggestions. I think we both know the outcome of this, but I'm willing to give them a try, lol.
 

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chuck where did you end up placing the crossover box when you did have the speakers installed?
 

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Discussion Starter · #12 ·
Well here it is: Just left the dealership and they were very cool. They pulled my car in, brought in another from the showroom floor that also had the pioneer system and let me compare side by side. They were identical in sound. Moving the fader towards the rear was a SIGNIFICANT drop in volume. Just to compare, I picked a random car off their lot and listenend to it. Although it had the nav and the touch screen (having seen this now REALLY with I had gone that route!) the sound was WAYYY better than mine. WTH I thought? I paid more for my stereo and this base model sounds better in the rear? WTH? So I talked with their tech guy and the shop manager and had them both sit in both cars and see and hear the difference. They both agreed with me. they contacted GM and as it turns out, The reason my rears are so quiet is the subs are taking away from them. The basic system has no subs, therefore, they equally share the power. They basically told me not much that can be done unless I go the separate amp route and upgrade the speakers themselves. There is no recall or TSB regarding this issue as of this morning. Not that I'm terribly surprised, just wished mine sounded as good as that one I listened to in the LTZ. So, Xtreme, need you to get with me so we can discuss how to upgrade and which parts I need. Stacy, thanks for setting up the appointment for me and let your bosses know they should address this issue with their Pioneer rep so it can be fixed.
 

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Thanks for the write up. Just got done installing my Polks today, panels came off nice and easy. Driver side door was a little tricky with the added plug for the mirrors but not horrible. Definitely an improvement over stock, deeper bass which is what I wanted and just better sounding speakers. I should note the standard system speakers are 4 ohm 20 watt speakers.
 

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Thanks for the write up. Just got done installing my Polks today, panels came off nice and easy. Driver side door was a little tricky with the added plug for the mirrors but not horrible. Definitely an improvement over stock, deeper bass which is what I wanted and just better sounding speakers. I should note the standard system speakers are 4 ohm 20 watt speakers.
Just so people get an understanding of what these mean, wattage ratings for speakers are always thermal ratings, not mechanical. They test the speaker to determine how much power they can put through it before they melt the voice coil. It is important to understand that you will reach disturbing levels of distortion long before the they reach their thermal limits.

The Polk MM series are excellent sounding speakers. Good to hear these worked well for you.
 

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I noticed the same thing the first time I played around with the pioneer system --I just played around with the fade to even out the sound and it works great!
 

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I contacted Stacy over at Customer Care and she suggested taking it in to the dealership. She set me an appointment for Friday morning so let me see if they have any suggestions. I think we both know the outcome of this, but I'm willing to give them a try, lol.
What was the outcome of the visit to the dealership. did they provide any solution to up the sound quality on speakers alone?
 

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What was the outcome of the visit to the dealership. did they provide any solution to up the sound quality on speakers alone?
Just read your reply from "04-13-2012, 05:24 PM". I could not see this before joining.
Much appreceated.
 
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