x-over point

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x-over point

Posted by RCA-fan (M) on February 23, 2012 at 17:23:01

In Reply to: A Question About The Network posted by thetubeguy1954 on February 22, 2012 at 10:49:32:

you can use 3.3uf to 4.7 uf caps. There is very little difference between 4.4 and 4.0 uf.

I "Xed" out the resistor, but this controls the sharpness of the roll-off.
You can use a 2r resistor.
I am not a capacitor expert, but we measurements of Polypropylene, Mylar,old oil filled and cheap electrolytic s with the Schlumberger test unit. ($22000.00)
The polypropylene were the best, but only slightly better than the old oil filled. Mylar was not quite as good.
electrolytic were the worst.
It should be noted though that there has been considerable improvment it electrolytic since this test.
JBL uses a lot of them.

Much more important is to place the tweeter in line with mid diaphragm. Use noise and listen to do this.

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Follow Ups Full Thread

Topic - Fostex T900a Tweeters. (Thanks John K.) - thetubeguy1954 16:43:58 02/18/12 (14)

Network - RCA-fan 10:00:17 02/20/12 (3)

A Question About The Network - thetubeguy1954 10:49:32 02/22/12 (1)

x-over point - RCA-fan 02/23/1217:23:01 02/23/12 (0)

RE: Network - thetubeguy1954 11:21:03 02/20/12 (0)

RE: Fostex T900a Tweeters. (Thanks Tom.) - Kloss 06:36:46 02/20/12 (1)

RE: Fostex T900a Tweeters. (Thanks Tom.) - thetubeguy1954 11:25:57 02/20/12 (0)

RE: Fostex T900a Tweeters. (Thanks John K.) - Don Reid 12:08:12 02/19/12 (7)

RE: Fostex T900a Tweeters. (Thanks John K.) - belyin 15:53:44 02/19/12 (6)

RE: Fostex T900a Tweeters. (Thanks John K.) - Don Reid 08:45:57 02/20/12 (5)

RE: Fostex T900a Tweeters. (Thanks John K.) - Jim D. 03:13:33 02/21/12 (0)

Don I Have A Question For You. - thetubeguy1954 13:49:09 02/20/12 (1)

RE: Don I Have A Question For You. - Don Reid 18:06:08 02/20/12 (0)

RE: Fostex T900a Tweeters. (Thanks John K.) - belyin 10:04:26 02/20/12 (1)

RE: Fostex T900a Tweeters. (Thanks John K.) - Don Reid 18:19:31 02/20/12 (0)

Follow Ups

x-over point - RCA-fan 02/23/1217:23:01 02/23/12 (0)

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