Originally Posted by donschorr
Max,
Thanks for all of your research you have done on the caps....
I guess I didn't ask the question properly- Crutchfield rates their bass blockers at what freqency they block at.
The ones I am thinking about block at 150 MHZ...
here is a link.
http://www.crutchfield.com/App/Produ...B150A2&tp=3216
Thanks again for all of your help, I can't wait to do something to get the bass back to the sub woofers!
Don
Don,
When I did this, I was using an audio test CD and it sounded like the doors were quiet under ~ 180 hZ with 270 uF caps.
Here is another quote from a knowing person (post #25):
"Increasing the capacitance value will lower the cutoff frequency for a highpass filter and allow more bass through.
The formula for calculating the cutoff frequency is...
Fco = 1/(6.283 x R x C)
So for 220 uF capacitor and a 4 ohm speaker (I am guessing about the speaker)...
Fco = 1/(6.283 x 4 x .00022) = 181 Hz.
For a 270uF capacitor, Fco = 147 Hz."
Here's a link...
http://www.qrp.pops.net/filter1.htm
It sounded like 180 hZ . This may say something about the resistance of the speaker/sub in the xFire. Maybe 3.6 ohms under load?
After looking at the crutchfield Bass Blockers, 150's would be your best choice!
Best to you!
Max