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Multi-Way Conventional loudspeakers with crossovers

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Old 20th September 2012, 11:17 PM   #811
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Perhaps a new homage to Briggs is due?
15 PLUS 10 or 12 with 15 rolled off first order and taking on some of the low bass, crossing a 10 to a 3 should be easier.
This is the project i have had in the back of my mind ever since the start of this thread, mainly because I have a 15" driver that isn't usable in anything other than an OB design
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Old 28th September 2012, 08:00 PM   #812
todd is offline todd  United States
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What do you guys think about one of the new Visaton drivers P.E. is getting now:
Visaton 9069 W300 12" Woofer 8 Ohm 292-588

or even the 10":
Visaton 9067 W250 10" Woofer 8 Ohm 292-586

in a Manzanita-style speaker?

They seem like they're a little less expensive than the go-to peerless driver.

They also have an interesting looking F.R. coming in Nov:
Visaton 3017 BG17 6.5" Full-Range Speaker with Whizzer Cone 292-546
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Old 28th September 2012, 10:48 PM   #813
Rudolf is offline Rudolf  Germany
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Quote:
Originally Posted by todd View Post
What do you guys think about one of the new Visaton drivers P.E. is getting now:
Visaton 9069 W300 12" Woofer 8 Ohm 292-588

or even the 10":
Visaton 9067 W250 10" Woofer 8 Ohm 292-586

in a Manzanita-style speaker?

They seem like they're a little less expensive than the go-to peerless driver.
There is no doubt that the comparable Peerless SLS drivers are better value for money - even at twice the price. But if you really are on a budget, a pair of Visaton W250 mounted in a H frame can be a very reasonable start into OB bass.
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Old 28th September 2012, 11:00 PM   #814
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PE data is wrong on one aspect, X-Max is 14mm in total ( +/- 7mm )
if you modeled giving 14mm X-Max you would get the wrong results
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Old 28th September 2012, 11:10 PM   #815
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Not suitable for the Manzanitas but cheap intro to OB could be a quad of these

10" Ribbed Treated Paper Cone Woofer Speaker 299-283
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Old 2nd November 2012, 11:55 AM   #816
AndrewT is offline AndrewT  Scotland
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I'm going to build a couple of iron core inductor from reclaimed microwave oven transformers.
The Is were welded on to the Es all on one side, so easy to dismantle and easy to insert an air gap in the legs when reassembling.

I will "test" the wound inductor by applying a frequency to a series combination of a resistor and the inductor.

Q.
at what frequency should I test for 20mH?
50Hz or 200Hz or somewhere in between?

What about the 2mH inductor? Should it be tested at a higher frequency? 500Hz, 3kHz?
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Old 2nd November 2012, 01:03 PM   #817
Pano is offline Pano  United States
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Good question. My LC meter tests at 400Hz, one would hope that inductors built for the audio range are linear (enough) thru the audio bandwidth.

What really matters is the impedance vs frequency, since that is how it's used in a crossover.
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Old 30th December 2012, 09:49 PM   #818
liasom is offline liasom  United States
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Default Peerless 830669 on sale at Madisound

Noticed that the Peerless 830669 is on sale at Madisound for $79.90 each + shipping. But since PE has free shipping the deal may not be so good depending on location. Maybe PE would match pricing? To my zip in TX the total would be around $10 cheaper from Madisound. YMMV.

Peerless 830669 at The Madisound Speaker Store
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Old 31st December 2012, 12:01 AM   #819
Johno is offline Johno  Australia
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What really matters is the impedance vs frequency, since that is how it's used in a crossover.[/QUOTE]

Impedance vs both frequency and current for an iron core.

I am building air cores and have wound the first 20mH. About 5kg and beautiful. Still soaking with the varnish so not quite ready for testing, and now that the festivities are over, no more interruptions. Also finished a 2mH but the moment I loosened the bobbin it went 'sproing'. "Drat" I said.

Ended up building a winding machine from scratch using a windscreen wiper motor with a homemade pulse width modulated speed control - the only way I could get enough torque to properly tension the heavy wire.
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Old 31st December 2012, 03:29 AM   #820
Pano is offline Pano  United States
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That's cool, would love to see pix.
What the DCR going to be on an airecore 20mH?
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