That's interesting. I agree with your ratings for the stock system prior to adding Dynamat, but after doing that, I've found that my biggest issue is with the tweeters, not the mids. I'm thoroughly impressed with the difference to mid-bass and road noise simply by adding the sound dampening. Of course, I'm considering upgrades, so there is obviously still room for improvement. I like the Infinity components you used, but would like to keep the factory amp just because I'm trying to avoid adding a separate amp. Might go with these Kappa series that have a little higher sensitivity (which is good for low powered setups like the stock amp in the HS):

I was curious what it would take to replace the sub (and doing some more Dynamatting in the back), so I took out the rear seat to assess. The rear seat came out surprisingly easily, but the rear deck looks like a pain. I looked at it for a while, but I can't tell how that back panel is held on. It looks different from the type of clips I'm used to seeing on those back panels. I went after it pretty well and couldn't get it to budge. There's also the battery back and motor back there and I was a little leery about the high voltage pieces. If you figure out how it comes off, I'd be very interested. By the way, the back seat (both pieces) come out like this:

1. Rear bench - pull up on each from corner to unclip.
2. At the same time, push towards the back of the car and down on the rear bench to unclip the back part of the bench and it will come right out.
3. Use a small screwdriver or pick to unclip rear seatbelt guides and pull seatbelts free. Also remove the headrests.
4. Remove 4 bolts on the bottom of the seat back, I think they were 12mm.
5. Push up to unhook seat back and it will pull right out.

 

I too added dynamat to the doors and noticed a significant reduction in road noise. I changed out the stock speakers as well and the sound has definitely improved. I will be adding a 4 channel amp that I have as the new speakers are definitely under-powered.

If I add the amp by splicing into the center plug feeding the stock amp as described in an earlier post, will the stock sub (which I am not replacing) lose its power source? Any info on how to keep the sub powered would be greatly appreciated.

You guys have really helped me improve the sound.

 

SInce you're splicing the output wires from the built in amp, i'm assuming one of those are specifically for the sub. So as long as you only splice the 8 wires belonging to the 4 speakers, the sub should still work.

 

I was actually wondering about the input wires on the factory amp. I thought I would be splicing the wires before they go to the factory amp and feed them to my aftermarket amp and then back to the output wires from the factory amp (and obviously onto the speakers). Is there a dedicated sub wire coming into the factory amp that I can leave connected to the factory amp (which would keep the sub powered and running off the factory amp)?

Thanks

 

Finally did the subwoofer yesterday.

The sound improvement is marginally better. It is better, but not sure it was worth the 3 hour job of removing the seats, drilling new mount holes, etc.. Even with an amp capable of powering the speaker just 2 feet away, it still didn't seem worth it. But I'm a picky listener and may need to play with the crossover a little bit. I'll report back.

I gave up on the dash cover for the speaker and just used a screwdriver to hold the thing up (pic). Too many seatbelt configurations to have to undue.

 

Does anyone have the original wire diagram that the original poster made?
All the links don't work anymore.

 

What wiring diagram do you want? What are you looking for?

 

The original poster refered to a "installation guide" he put together.
But the link for it no longer works. There are afew relinks to it later on in this topic, but none of those links work either.

 

Well, I private messaged the original poster.
Hoping he still has a copy of this file.

 

I'm trying to replace my center panel speaker, but I don't know what to replace it with or how to replace it, is there a plug-and-play that I can buy and replace it with? anything will help as the center speaker sounds blown out and I want something that sounds great and will last, thank you!

 

You may be the first person to ask this and as this forum gets little traffic as there are not many of our cars around, i will answer.
You will need a set of plastic trim removal tools to pry the grill away from the center speaker. Amazon or Harbor Freight has them. They are cheap.

There are a few used original speakers on eBay for about $50. That is what I would get. https://www.ebay.com/itm/256148539089?epid=1022068831&hash=item3ba3a486d1:gIgAAOSw4AJkuXhy&amdata=enc%3AAQAIAAAA8M6EuVycMuS5jSSke7uUbUxjHyAMtPn0mF89gGrvTuxBjhQzFS7IHApr3GgDHsOlgm%2Fs4sZg6uwZyJ0hlJuY41OuAq7ih6mSXH5u9RaIq1eUyNfW97F9X0G6IvvOdO24L7ir42r%2ByxsX6NJ37JgXux%2F4U0MOSu9p72Pu8LvZdkRSL%2BiBidRWkwJVl7hpZD6MWeSr7kAZihcw4mjSDfKNq0k1I9ipovVJMACdbpFF2luAE1A9DY3%2Bt6y9Bz6pwqMBz19lkIqplWQq5BvXeOy%2FL66rtaAabaJui1IHrRmyPcg3GLWaARXanMozN4OByXUqfw%3D%3D%7Ctkp%3ABFBM-s2Slq9j

There are a number of replacement speakers that will fit. However you may need a cable adapter to connect it to the car wiring. I recommend shopping at Crutchfield as they are car audio specialists. They know what fits and usually provide or sell the needed adapter cables. They will also sell the trim removal tools and have links next to the speakers.

Here is a link to them:
https://www.crutchfield.com/g_400/Al...tml?tp=105&l=2

 

If I were to only be going the way of speaker replacements, would it be a better shot to run components and crossed over tweeters from the dash corner speakers or from the door 6x9s? Or might it not matter?

 

I would see what they recommend at Crutchfield as they are experts in what speakers fit best in almost every vehicle, and they sell great stuff with great support. I have used them for years.
​​​​​​https://www.crutchfield.com/m_399/Car-Speakers.html

 

Thanks Clutchless - I have done several installs with their help in the past. I wasn't sure if Crutchfield would support the GX at all but I see now that it is only the center dash they stay away from.

 

Do you have an HS250h? Or a GX? If a GX then you are in the wrong forum!