Crossovers - line level - passive 1st order type!? esp. for 'HP-only' to tweeters. - Timbo in Oz

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Crossovers - line level - passive 1st order type!? esp. for 'HP-only' to tweeters.

I'm wondering if my research costs - in money AND time - in arriving at a 'good blend' to a LP-less bass-midrange driver might not be lower - and more satisfying - going with a HP input filter on the tweeter amp?

We know the relevant output Z and input Z's fairly accurately, and that these are far more stable across the bandwidth / under real signal conditions - than the Z's at spkr level are.

I was considering a modern low Fs (~500z & lowQ) 91db/w (no padding R's) 25-28mm dome at first order off a single 'GOOD' cap - to replace the existing treble system*.

*A '70s Foster/x 35mm soft dome >94db/w, 8? watts - with xover -3db @3.5k, padded, Eq'd, and FS trapped, two air coils, laddered MF polycarb caps!!! It cascades to 3rd order PDQuickly, due to the very sharp \/ Fs notch at 1.1k!

I have an OOBand RC 1st order input filter on the treble amp, <200hz, to limit the bass getting to the HP only crossover, and it did sound a teeny bit cleaner! even with air coils and the padding R's etc.

Do I go for a -3db pint of 3.5 k or a good bit higher than that, say 4k, 5k, even 7K? AND, is there any way of varying the -3db point.

How valuable are premium parts in this kind of role, and can I still save money? See my signature block!

TIA of course!

Warmest
Timbo in Oz
The Skyptical Mensurer and Audio Scrounger
And gladly would he learn and gladly teach - Chaucer. ;-)!
'Still not saluting.'
http://www.theanalogdept.com/tim_bailey.htm

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable

Topic - Crossovers - line level - passive 1st order type!? esp. for 'HP-only' to tweeters. - Timbo in Oz 17:59:21 03/13/08 (6)

GEEEZE what did I do, Did I FART too loud!!! - Timbo in Oz 15:52:58 03/14/08 (5)

RE: GEEEZE what did I do, Did I FART too loud!!! - Square Peg 19:29:54 03/15/08 (0)

RE: GEEEZE what did I do, Did I FART too loud!!! - Ron Oehlert 14:20:11 03/15/08 (1)

you're too right, once more! ;-)! - Timbo in Oz 15:38:46 03/15/08 (0)

Maybe you should try - kavakidd 11:45:16 03/15/08 (1)

tah Kava, done! - Timbo in Oz 16:27:05 03/15/08 (0)

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.