In Reply to: Audio Physic Avanti IIIs back in my system posted by jeffreybehr on July 28, 2015 at 22:19:46:
The original 3rd-order filter is wrong because it's for a different tweeter, the original hard-sounding ring radiator.I've calculated both a 1st-order filter (3KHz & 8 Ohms* = 6.6uF = 6.8uF caps I already have) and a 2nd-order L-R (3.3uF and 0.85mH). I have all parts but the correct-value resistors in Mills SRA-12s. Tonite I jumper-cabled the 1st-order filter and listened for a while. Haven't decided if I have too much treble or the treble is harsh in quality; based on what others have said, probably it's the latter. Sunday I'll patch together the 2nd-order filter and hear how that sounds. I hope the sounds are better.
And before someone tells me--I KNOW the new filter won't be exactly right, but it's as likely as not to be less wrong than the original. Also, it'll have only one cap in series, which is only half as bad as having two caps in series. After all, just as there's no connector that sounds as good as NO connector, there's no capacitor that sounds as good as NO capacitor. :-)
* including a 4-Ohm dropping resistor
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Have decided to replace the original, wrong tweeter x-over - jeffreybehr 08/23/1501:47:39 08/23/15 (4)
- After listening to and tweaking values in the FOF... - jeffreybehr 01:32:36 08/26/15 (0)
- RE: Have decided to replace the original, wrong tweeter x-over - fantja 05:40:39 08/23/15 (2)
- A pic for fantja - jeffreybehr 19:43:48 08/23/15 (1)
- RE: A pic for fantja - fantja 18:52:34 08/25/15 (0)