| Re: 4 Pi crossover questions [message #60897 is a reply to message #60889] |
Wed, 16 September 2009 21:24   |
 |
Wayne Parham
Messages: 18722
Registered: January 2001
|
Illuminati (33rd Degree) |
|
|
Yes, I use a 10uF capacitor for C4 in the four π loudspeaker. It slightly shifts the nulls upward, about 5° going from 10uF to 20uF in this position. I didn't discover that immediately, but found it after some experimentation. The difference is very subtle, inaudible really, but measurements show it to be the better choice, if vertical symmetry is desired.
You actually could steer the pattern by choosing the proper value for C4, if you wanted. Speakers mounted high on walls would probably be better with a 20uF capacitor in that position, speakers nearer to the ground would be better with a 10uF cap. Both are pretty good choices, actually, since the nulls are separated pretty widely but for most cases, I think the 10uF value is probably better.
|
|
|
|
Posting Rules
Members
Search
Help
Register
Login
Get a T-Shirt!
