paid big $’s for the Monsoon upgrade in my ’06 Grand Prix GXP. It was a huge mistake! As I kept blowing speakers all around, I decided to upgrade all the speakers with aftermarket but it was a challenge to find 2 ohm and 3 ohm speakers that would fit. Finally, I did it! I’m a true audiophile and the sound is HUGE.

The solution is simple. I used Infinity Reference all around; in the dash, the doors, and even in the rear deck. I bought two 9602ix 6”x9”, two 6502ix 6 ½”, three 3002cfx 3 1/2”, and two 075tx 3/4” tweeters. I shopped, bought online, and paid less than $375 for everything.

Everything fit and I kept all the factory harnesses intact. I simply clipped the leads from the crappy, stock, paper speakers and connected them directly to the Infinity’s.

The only challenge was the rear deck but it turned out to be fairly simple. I took my Dremel and cut the enclosure part off the X bracket that held the 3” crappy mid woofers and mounted the Infinity 3002cfx directly to the arms of the modified X bracket. I had plenty of clearance, since I didn’t mount the 6”x9”s to the plastic, snap-in, speaker bracket like the stock ones. Instead, I literally just dropped the 6”x9” speakers right into the cutout in the back deck. Then I snapped the factory speaker bracket on top of the speaker, making a super tight mount without any fasteners. I connected the low pass to the 9602ix’s and the high pass to the 3002cfx’s.

Done! I know I lost a lot of the frequency response from all of the speakers because of the Monsoon amp/crossover but it was relatively inexpensive and an easy installation. The sound I have is nearly competition. I hope this helps everyone trying to do the same.

Also, If anyone wants to purchase the factory speakers I pulled out, hit me up in a private message. I have them all except the 3” midwoofers that were blown.
Last edited by raylightjr; 01-31-2013 at 01:06 PM.


I just did exactly as you did. Front 6 1/2's sound great. The rear 6x9 sound ok with bass at 0. If i turn up the volume or increase the bass all kinds of distortion on low bass notes. Any suggestions?