I finally caught up on this thread (after more than 220+ posts) and I think I figured out, as some of you posted, why the front speakers sound "tinny" with the 220uF capacitor. It looks like everyone was assuming the front speakers were 4 Ohms vs 2 Ohms. All indications point to the fact that the front speakers are indeed 2 Ohms, thereby limiting the filter too high. A 220uF cap on a 4 Ohm speaker filters the bass at 181 Hz, whereas the same 220uF on a 2 Ohm speaker filters the bass at 362 Hz (much less bass is passed to the front, causing the "tinny" sound). Again, assuming the speakers are indeed rated at 2 Ohm, the 330uF will filter down to 241 Hz, meaning more bass is passed to the fronts, reducing the "tinny" sound.

I attached a chart to illustrate what I mean. If I am wrong, please correct me.

 

That has been my experience as well. The 330's permit much smoother sound at low volume levels. The Sub's still do their thing well.
Thanks for the research . . . Xfile owners can have a more positive audio and driving experience.
Jack

 

I installed the 220's and got good results, but I believe I will swap to the 330's because of the low bass response in the doors. Thanks for the research !

 

I JUST finished installing the 330s and WOW!!! I had a little difficulty finding non-polarized 330s, including a trip to the local radio shack and Circuit City. I finally found them at a small electronics parts store, however I went with the 65V instead of the 100V. The 100V were almost twice the size. Additionally, all they had was polarized. So, I bought two for each side and connectd them in series. I soldered the negative (-) connectors together and shrunk wrap them. That left the positive (+) ends free for the lead wires. Using my glue gun, I glued the two radial units together and then completed the wiring steps to make the leads. A quick solder of about 4 inches of lead wire and some shrink wrap around the connections, and all was done. It took me longer to prep the capacitors then to actually install them in the Xfire.

In all, it was well worth the time. The separation is incredible. I cranked it all the way to 40 with a Great White CD in the unit and it was so clean and tight. I actually dropped the bass down to +5 and the treble was so crisp, I dropped it to +4. What a difference!!! This is a must-do for anyone who is still using their Infinity stereo and wants a cheap, fast upgrade to TOTALLY enhance the sound.

 

Thanks for the great tip on this. I've read through this thread a couple times and just want to make sure I'm looking at the right capacitors. I've turned up a little luck at an audio shop.

http://www.nichicon.co.jp/english/products/pdf/e-kw.pdf

The ones I'm looking at are the 330uf 63v KW audio grade capacitors. These ARE polarized.

I understand the concept of what this mod does, I just do not understand all the tech specs for the capacitor to choose and if these will work in the Crossfire. I do not want to get the wrong ones and have a melt down.
Thanks

 

I did a bit of experimentation on this and found these:

http://www.newark.com/united-chemi-c...tor/dp/16M7455

To provide the best all-around performance.

 

The factory stereo system is definitely 2 ohms as I originally stated a few posts ago. If you look at the factory wiring diagram for the amps/speakers their clearly marked as 2 ohms.

I tried to find 330 (or close) caps at Frys and no luck, so the hunt continues for appropriate caps.

Happy Holidays,
Brian

 

Where do these from Crutchfield fit in to the scheme of things?


Bass Blockers

Pairs (150 Hz cut-off)

IN STOCK

• Handles up to 50 watts RMS
• 6 dB per octave roll-off

They have several others and, since I'm electronics deprived, the cut-off description has me further confused.

 

Their most likely made for 4ohm systems. You'd need to figure out what the specs on the caps are to know what their cut-off is for a 2ohm setup (probably 300 Hz).

 

Crutchfield says, the cut-off points are 150Hz with a 4 ohm speaker and 75 Hz if you use 8-ohm speakers. Am I too assume that the cut-off is 300Hz if used on our 2 ohm system? And, if so, is this the same as 300 uf as discussed in the thread?

From Crutchfield:

 

I have a new 08 crossfire and the only disappointment is with the radio. I am so great full for this information because I was about to do a total change out. I will let you know how I think it sounds. Thanks !

 

I purchased the 200uf, 100v capacitor from Amazon.com and installed both caps in about one hour. The system sounds great. Thanks for the info. Walter https://www.crossfireforum.org/forum.../icon_razz.gif

 

I did this mod over the summer. Now, the entire drivers side speakers are not working. Well, they BARELY work with the volumn cranked way up.

Any ideas on what the problem could be?

 

Check the balance adjustment.

 

That's the first thing I did. I turned it all the way to the drivers side only and turned the volume way up. That's how I know it puts out a just a little bit of sound.

I also changed radio stations and ran a CD. It's the same on both.

 

You may have blown the cap or a wire has come loose. Take a look at the cap and see what it looks like. Sometimes, when they go bad, the ends will "swell".

 

My amp went bad when I had my xfire for a short time. But both sides were low. Could be the amp or head unit. I got the amp replaced under warranty.

 

Inferno,

I have an extra Head Unit we can switch it out or take the one out of your wifes car to test that. I have the little keys to remove the Head Units and that would take 5 minutes to do~

 

Remove the capacitor. Try it again?

 

Yeh, I'm suspecting it's probably the head unit.

I don't think the speaker wires in the door would effect the rear speaker.