Crossovers - where to start? - Page 6 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #51 of 157 Old 01-28-13, 03:15 AM Thread Starter
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Re: Crossovers - where to start?

The xo work is going well, the compact speakers have some great bass (unexpected).
Question about the zoble, it is asking for Inductive Equivalent (Le) Henries

I toggled in a few numbers and get crazy cap sizes - Do I go back to spec sheet?

Le @ 1kHz 0.94 mH (cap 17,639 uf)
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post #52 of 157 Old 01-28-13, 01:38 PM Thread Starter
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Re: Crossovers - where to start?

Too much fun

3 more - can try in the 5.1 (as soon as finished)
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post #53 of 157 Old 01-31-13, 04:03 AM Thread Starter
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Re: Crossovers - where to start?

A lot of speaker for $30 woofer and $32 tweeter.



Could be but thinking the W design box attenuates standing waves, the box is a "black hole" - I.e. no echo.
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post #54 of 157 Old 01-31-13, 11:32 AM
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Re: Crossovers - where to start?

Quote:
Odougbo wrote: View Post
The xo work is going well, the compact speakers have some great bass (unexpected).
Question about the zoble, it is asking for Inductive Equivalent (Le) Henries

I toggled in a few numbers and get crazy cap sizes - Do I go back to spec sheet?

Le @ 1kHz 0.94 mH (cap 17,639 uf)
It's in the conversion factor. Henries vs milli-Henries
How does 11F and 9 Ω sound.

http://diyaudioprojects.com/Technical/Speaker-Zobel/

Crossovers - where to start?-zobel.jpg

Silence is golden but duct tape is silver.

DIY completed:

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post #55 of 157 Old 01-31-13, 06:09 PM Thread Starter
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Re: Crossovers - where to start?

Thanks Rob - now that calculator seems to work and makes sense - got some crazy values with the other

I have something that seemes to work while waiting for parts: 3.3R and 12uf cap.

There's a sizzle sound in the very high end of the woofer, the 3.3/12uf cap zaps it out.

Whats a draw back of a zobel? (there's always a catch), I thought I started to hear that tin-can-sound with some of the other combinations.

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post #56 of 157 Old 01-31-13, 11:20 PM
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Re: Crossovers - where to start?

The Zobel network is purely to make the amplifier and crossover see a fixed load across the frequency range.

Silence is golden but duct tape is silver.

DIY completed:

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post #57 of 157 Old 02-03-13, 04:22 AM Thread Starter
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Re: Crossovers - where to start?

Thanks Rob,

Buddy came over yesterday; quite versed in xo design/measuring. He helped with many of the elementary questions.

We found that both drivers have a slight breakup at xo point, the tweeter is out-of-phase to cancel that out (guessing, but seems to work).

So close but yet so far....

New xo by Madisound here in day or two
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post #58 of 157 Old 02-04-13, 04:22 PM Thread Starter
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Re: Crossovers - where to start?

New xo on it's way!
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post #59 of 157 Old 02-07-13, 11:14 PM Thread Starter
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Re: Crossovers - where to start?

Madisound sound moves fast! New xo's, in just a couple of days, and they included "cut sheet" with order; very professional!

This is working nice, but I guess it never ends, going to try two other types of woofer coils:

15 gauge steel lam
12 gauge air
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post #60 of 157 Old 02-08-13, 12:10 PM
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Re: Crossovers - where to start?

That's a neat board.

It looks like it is designed to do multiple styles of crossover.

Silence is golden but duct tape is silver.

DIY completed:

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