Crossovers - where to start? - Page 7 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #61 of 157 Old 02-08-13, 04:16 PM Thread Starter
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Re: Crossovers - where to start?

They were sounding nice with the 16g series woofer coil, but needed a tad more bass - although would be fine for HT as is.

[if fact I think the smaller inductor would be better for HT so the low bass doesn't compete with a HT sub-woofer]

I really wanted to hear some bass extension without subwoofer; so shortened a few wires, used 14g feed wire and swapped the woofer coil to the 14g - amazing improvement!! The woofers have about 40 hours on them; I suspect they will loosen up over time and get even stronger.

btw...Kudos to Madisound they designed the xo, and sending parts in record time (e.g. 3 small orders in 1 week).

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Last edited by Odougbo; 02-09-13 at 03:00 AM.
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post #62 of 157 Old 02-10-13, 02:34 AM Thread Starter
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Re: Crossovers - where to start?

Some additional feedback (3 are finished)

* one pair in "stereo" room - crazy low bass, very nice definition with bass and guitar strings, vocals are natural and smooth. I did change the 1st series tweeter from 2.2ohm to 3.3ohm; the tweeter was a little hot on some songs. Also as mentioned swapped the series woofer coil to 14 gauge

* HT center channel- ordered just enough parts to complete the 3rd - shown left/down. Again, rich bass, set xo in processor to 40, which was too low, then moved to 80hz.

I like that the tweeter resistor can be switched for tweaking; this is not something that can be done in 5 minutes, need to sit and listen for a while, try many sources, songs movies, etc. (re-soldering is only 5 minutes).
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post #63 of 157 Old 02-15-13, 02:40 PM Thread Starter
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Re: Crossovers - where to start?

Now my friends are calling these the Penguins.

I tell them they kick like a Kangaroo...........
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post #64 of 157 Old 02-15-13, 03:34 PM
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Re: Crossovers - where to start?

Actually, to me, they look more like the Portal Turrets.

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post #65 of 157 Old 02-16-13, 03:13 AM Thread Starter
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Re: Crossovers - where to start?

The bass on them is remarkable. I'm tempted to add a subwoofer, but fine without one.

(They are are stands and about 8" from wall)

btw, posting the MS crossover. As you can see, I thought the tweeter was was a bit hot, so jumped to slightly larger resistor.

http://www.madisoundspeakerstore.com...1/2-wool-cone/

http://www.madisoundspeakerstore.com...iator-tweeter/

MS is out-of-stock on tweeters, PE still has them.



What are Portal Sentry Turrets? From a Syfy move?
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post #66 of 157 Old 02-16-13, 05:23 AM
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Re: Crossovers - where to start?

It is a video game, very popular when it came out and followed up with Portal 2.
The turret can be seen at 1:05 in the demo clip here:


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post #67 of 157 Old 02-16-13, 08:39 AM Thread Starter
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Re: Crossovers - where to start?

Now here is a low resistance coil

http://www.parts-express.com/pe/psho...55-804&scqty=2

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post #68 of 157 Old 02-17-13, 02:01 AM
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Re: Crossovers - where to start?

What IS the resistance of that EXPENSIVE coil?
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post #69 of 157 Old 02-17-13, 02:46 AM
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Re: Crossovers - where to start?

The one they show in the picture is 3.3mH - 0.07Ω

Crossovers - where to start?-c-coil.jpg

It's not that expensive considering the copper for my four air core, self wound 1.3 mH coils in 1986 cost me au$50.00 (about two days wages) and their impedance was 0.7Ω

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post #70 of 157 Old 02-17-13, 06:27 AM Thread Starter
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Re: Crossovers - where to start?

I guess they only have the stock pic - 3.3mh looks like 20' (3 meters) of wire I bet a 1.5mh is 2/3 of what is shown.

They were for high power application - so I didn't get them, but did spurge on 14gauge foil, which was $1 - $2 less.

Loving these little speakers; my speaker grue-guy said a lot of the manufactures are using this design of a isolated tweeters...great minds I guess

Naaa...I saw a pic of a baffle cut like this long ago, things like this I can remember

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