Ridiculously "stiff" sub !! what is the point? - Page 3 - diyAudio
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Old 9th September 2007, 04:27 AM   #21
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As seen from Michaels post of measured T/S specs; an ultra stiff suspension usually translates to a high(ish) Fs. A 44hz Fs for a 12" driver puts it in the "oversized crappy mid-bass" category; definitely not a "subwoofer".
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Old 9th September 2007, 04:51 AM   #22
anatech is offline anatech  Canada
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Hi theAnonymous1,
With a woofer that stiff you have to change your thinking. Trow out your concepts of T/S parameters (it's hard to imagine). Now consider that woofer is simply a piston. Similar to those tiny Sunfire subs.

I don't agree with this, but I may be wrong. Several designers have got this concept to work.

-Chris
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Old 9th September 2007, 05:23 AM   #23
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Quote:
Originally posted by anatech
Hi theAnonymous1,
With a woofer that stiff you have to change your thinking. Trow out your concepts of T/S parameters (it's hard to imagine). Now consider that woofer is simply a piston. Similar to those tiny Sunfire subs.

I don't agree with this, but I may be wrong. Several designers have got this concept to work.

-Chris
I understand what your saying, but I was thinking of more traditional automotive designs. Subs like the sunfire use heavy EQ Linkwitz style.

If you put a driver with a 44hz Fs in a normal sealed or vented box and throw it in a car without any EQ, you will be wondering where the lows ran off to.
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Old 9th September 2007, 05:48 AM   #24
JinMTVT is offline JinMTVT  Canada
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for what it is worth ..( not much )

no brand name
the magnet is 8" thick and this 10" driver must weight something near 50-60lbs alone ..crazy

there seems to be a regular cone type paper under the flat front baffle, the frame is casted alum i believe
and its vented

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


i can move it approx 1inch in and 1 inch out without distorting the surround rubber ( happens a bit faster going in then out ) and i don't hear anything touching aka coil botomming

neway i'm done with this shitty stuff
still don't undestand the goal of this driver


any buyers??
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Old 9th September 2007, 06:26 AM   #25
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That looks like the HiVi SP10.......

http://www.partsexpress.com/pe/showd...number=297-460

If you were closer I would take it off your hands. It would probably do OK in a small sealed box with a Linkwitz Transform and >1000w amp.
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Old 9th September 2007, 06:28 AM   #26
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Jim,

If you are in toronto I`ll give you $20 for it and I can possibly pick it up. It would make a good frame for some other than audio project I am playing with that needs a moving diaphragm. Send me PM if interested in my offer.
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Old 9th September 2007, 07:02 AM   #27
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Jim,

I think theannonymous1 had it right as the one from Partsexpress. Based on the publshed specs it sure sounds like the VC in yours is shorted.

My offer stands since I would plan to put a different VC and metal cone in the driver anyhow for my non-audio experiment.
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Old 9th September 2007, 09:12 AM   #28
Mikey p is offline Mikey p  Canada
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If it is from Swan as "JinMTVT" was told then it would be the HiVi SP10.
http://www.swanspeaker.com/product/htm/view.asp?id=50
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Old 9th September 2007, 12:11 PM   #29
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Quote:
Originally posted by theAnonymous1
That looks like the HiVi SP10.......

http://www.partsexpress.com/pe/showd...number=297-460

If you were closer I would take it off your hands. It would probably do OK in a small sealed box with a Linkwitz Transform and >1000w amp.
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Old 9th September 2007, 12:43 PM   #30
OzMikeH is offline OzMikeH  Australia
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Quote:
Originally posted by rcavictim
My offer stands since I would plan to put a different VC and metal cone in the driver anyhow for my non-audio experiment.
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