I used a 266 uf cap only because that was the largest value I could find. And the results were very good. My intuition tells me that the 330 uf caps would be a better solution. But the good news here is that since this is a relatively mild 6dB/octave filter slope rather than a brick wall filter, the difference won't be dramatic. Anything between 200 - 330 would make a difference.

 

Ive tried reading through this thread and it seems to change like a politicians promises. My question is for ppl with an aftermarked head, like me. I also have a set of 2 10" subs with an amp running them. My head unit has a hi-pass filter but Im not to good with stereo stuff.

Would this mod work for me? Im not to concerned with rear bass but I live midrange and crisp tweeters. I dont know what size caps will give me the crisp sounds up front or if I even need this mod???

 

This sort of thing is virtually impossible to diagnose from afar. Depends what sort of filter (crossover) your current electronics have and your taste in music / frequency response. If you've got a digital active crossover that you can apply to each channel, then you could likely do the same thing (better actually) electronically. But given that unlikely scenario, you've probably just got a different static high pass filter. If the FR balance between the door units and the rear subs doesn't sound right, give this fix a try. It will cost less than $20 and 30 minutes of your time to find the answer and it's easily reversed if you dont like the results.

Two 10" subs in a volume the size of the Crossfire interior is just dumb to me. I'm only interested in an accurate power/frequency response curve and natural sounding voice & instruments. The little subs in the rear of the Crossfire do just fine to below 30 Hz and balance nicely with the mids/highs with this high pass filter in place. But, if you value big thumping bass more than accuracy (flat frequency response), enjoy. It's your car. I just can't imagine getting more than a few Hz additional frequency response out of the big subs because there isn't much musical content below 25-30Hz. But level/response matching two 10" subs would be a huge problem. Still, I'd imagine hip hop fans would love the whump whump whump from the bloated bass. And no, this high pass filter won't fix that at all.

 

ok Ive read almost all the post and the pictures actually confused me...I see prepare1a pic using the red and prepare2a using the black. So I think you just splice into red or black in line with the capacitor ? in prepare2a the black wire is just 1 wire with the cap spliced into it ? (since in the pic its cut off at the bottom)

 

Dude.... You are crazy for doing that. Here is what you want to do....

Take black wirea and splice with the number 2 rgb wire. When you see the spark then you can pick up the black3 wire and cross it with the red2 and blue10 in order to get the flux pipe working within the correct specs. Dont cap the red wire no matter what you do. When all is said and done you will have one heck of a system.

 

That is really confusing.

 

Unplug the connector from a speaker, cut ONE wire and splice the cap in. Series connection.

 

ok got my caps (before I cut) ....I'm going to cut the black wire and splice in my capacitor in line, reconnect the plug, then the battery and I'm done ? Right ?

 

There is no need to disconnect the battery before doing this mod. Just be sure that the ignition switch and the stereo system are "off."

 

did the bang for buck audio mod......what a difference, bass was humping the rear spkrs and a fuller sound. Got in the car today and the sound was different,lost alot of the the bass had to go up to +6 (that would have been to much yesterday) used the 200uf caps. What could have gone wrong ? simply cut into the black wire and inserted my cap, good crimp connectors,no exposed wire.

 

ok did the bang for the buck mod using the 200uf caps non-polarized from amazon. Noticed the improvement, but cant seem to get the thumping bass from rears as I read other's have. (Spliced into the black wire) It still seems Im getting more bass from the fronts ? Maybe using a 220 or 250 cap? Current setting's I use are +4-+5 bass +2 treble. Whats with the tone control ? How do you adjust it?

All I want from the sound is more bass coming from the rears, front spkrs are fine now.

 

This was ridiculously easy, following the directions and pictures from the beginning of the thread.

I used the 330uF caps from Parts Express, and it's the best $14 improvement I've made to any car. Even with my poor soldering skills, it only took me 45 minutes start to finish.

 

Excellent mod, sounds SOOO much better with these in place.
For scandinavian customers i recommend buying from Elfa.

Artnr: 67-045-67
220uf.

Big thanks for this tip!

 

I added 330s and still get what I think is too much bass from the door speakers. Has anyone tried or considered going to a 2nd order crossover filter?

 

Went the easy route and ordered the bass blockers from crutchfield. Not sure what they are rated at but took about 10 minutes to do with a cigarette break thrown in..lol. Like the outcome very well. My buddy bought a used suv and didn't like what he found in the trunk.. so I now have a new project..

 

Here's some Cap install pics:

 

Why two capacitors on the one speaker? Crutchfields come with the stranded wire already attached and shrink tube covered. Just clipped mine in half - stripped the 4 wires (speaker and capacitor) and wire nutted back together.

 

MrMiata, the two capacitors on each side are creating a non-polorized set. Since this is an A/C sine wave, a non-polorized capacitor is warranted. To make non-polorized caps out of polorized caps, you tie the positives together and splice the negs into the curcuit. The caps values should be the same and the result of tying them together is half the value of the polorized caps used. For example, 560uf polorized caps used makes a set of 280uf non-polorized caps. Use 4 caps to make two sets (one for each side).

Plus, he spent $0.50 cents each capacitor and actual shipping for his mod. Resulting in a bill for only $3.71 (again, thanks for that tip!)

 

Couldn't have said it better myself GraphiteGhost of Halloween past! Tee Hehehehe!

BTW, I sent you a PM

 

Thanks for the enlightenment.. for a minute thought you had just reworked this method.