Reddit reviews NEW INFINITY KAPPA 693.9i 6x9" 330W 3 Way Car Audio Coaxial Speakers Stereo

As someone who spent an inordinate amount of time completely gutting his 9-3 Aero's sound system, I'm more than happy to offer a handful of tips for this. I dug about forever trying to find walk-throughs and info, but I'll be damned if that wasn't a tedious process. Also, if you need any further help, feel free to PM me, I'm a wealth of knowledge on this, sadly.

Anyhow, a couple of things:

• Firstly, and surprisingly, I found that after removing and replacing all of the factory speakers in the car, the pair that by leagues made the most significant impact on the overall sound were the 3.5" component speakers in the dash. The stock units offered laughable bass response and sounded tinny as hell, they always bugged me the greatest. Take those suckers out (only 2 screws per each, aligned to where they're fairly easy to remove), use a flat-headed screw driver to pop the tweeters out, and drop in these suckers. Yes, they are coaxial (i.e., no separate tweeters), but don't bother with an additional pair of tweeters, these Infinity's are far better than any equivalent setup, least of which the stock setup.
  
  
• Next, the door speakers. These proved to be the most time-consuming, not least of which the way they are mounted. Once you have the door cards out (great guide here), you'll find the speakers mounted on the door card itself, as opposed to being set into the door frame. Now, whatever speakers you go for (definitely choose coaxial in this case, a component setup in the doors is a complete nightmare), keep in mind you only have 2 1/2" depth to set the speakers, so be careful when choosing your kit. I went with these guys from Boston Acoustics. Now, while they're no longer selling this model, just go for their new-model 6.5" coaxial, or the similar offering by Infinity Kappa. In my experience, Boston Acoustics and Infinity Kappa (owned by Harman/Kardon, no less) offer the best experience in after-market car audio, touting (in my opinion) the best and brightest midrange and high, with tight, accurate bass. Anyhow, unless you're planning to amp the setup, this is all you really have to do. However, if you are planning to add an aftermarket amp, tackling this is a whole new animal. You're looking at pulling the factory amp out from under the seat and bypassing it, something I can walk you through should you need to.
  
  
• Lastly, the rear deck. You have slots for the 6x9's for the Arc and Aero and slots for 4" speakers for the Linear and Vector models. I only replaced the 6x9's, and used a pair of Rockford Fosgate Component speakers, which I somewhat regret. The best option for these speakers (again, in my opinion) are Inifinity Kappa's 693.9i 6x9 coaxials, the bass response is unprecedented (deep, full, and crisp), and the highs are brilliant. These are by far and away the trickiest to mount, caused me quite a bit of frustration and still do. Each 6x9 is set by 4 screws at each corner, but each speaker is pushed so close its respective rear pillar that two of the screws are almost wholly inaccessible. Either find yourself a trick screwdriver that can be used in extremely tight places, or do what I did and simply use a set of pliers to remove the two hidden screws from the bottom of the rear deck.
  
  This all aside, you may want to consider some sound deadening, particularly in the rear deck, especially if you plan on amping the setup. People say go with dynamat, but shit's expensive, and better alternatives are out there. Personally, I took the decidedly ghetto route, and cut out a foam mattress pad to size and set it in the deck. Also, you'll want to kill the rattling coming from the third brake light over the rear seats, you'd be astonished at how much cabin noise that crappy plastic cover is responsible for. Use weatherstripping to cover that damned thing on the inside, and just place it back, problems solved. Anyhow, thanks for making me feel useful today, have upvotes!

Try these http://www.amazon.com/gp/product/B0018SJ4AK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

and these http://www.amazon.com/gp/product/B001HL0UAG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

I installed those and am very happy with the results. Mine is a 2000 9-3 SE. Cheers!