Crossover freq. variance with impedance
07-15-2003, 12:27 AM
#1
Let's say you're using a typical passive component crossover. Low pass for the mid lets say is 4000hz and the speaker in the set is 8ohm. What happen's to this crossover point when you swap in a 4ohm driver instead of the 8ohm?
07-15-2003, 06:57 AM
#2
Check the chart on page 16: http://www.rockfordfosgate.com/rftec...DSMamp_MAN.pdf
Pretty sure that your crossover point will be cut in half, so around 1800hz.
Pretty sure that your crossover point will be cut in half, so around 1800hz.
07-15-2003, 12:34 PM
#5
Guest
Posts: n/a
Depends on the xover.
If it is a simple 6db xover like in that link then yes the frequency will halve. BUT most likely it is a 12db or even 18db xover which will not behave the same way - all you could bet is that the xover point will be 'lower' but without a good flexible xover calculator you would need to test to see where it wound up.
If it is a simple 6db xover like in that link then yes the frequency will halve. BUT most likely it is a 12db or even 18db xover which will not behave the same way - all you could bet is that the xover point will be 'lower' but without a good flexible xover calculator you would need to test to see where it wound up.
07-15-2003, 01:14 PM
#6
1000 Watt CAFz'r
Join Date: Aug 2002
Posts: 1,239
07-15-2003, 06:58 PM
#7
07-15-2003, 07:21 PM
#8
So it looks like the final cutoff would be 2000Hz with a 12db crossover. Would I be correct to say I could bypass the crossover and pick up a .22505mH inductor to get the desired 4000Hz cutoff? If so, could I find one at Radioshack or what other place?
07-16-2003, 12:38 PM
#9
Guest
Posts: n/a
^ That calculator still won't let you know. Only one I have found with that kind of flexibility is on Term1.
Anyway - yeah you can buy your own inductor but I doubt Radio Shak will have it - try www.solen.ca
Anyway - yeah you can buy your own inductor but I doubt Radio Shak will have it - try www.solen.ca
