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Old 14th January 2013, 12:19 AM   #11
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Quote:
Originally Posted by ryuji View Post
single 2.5 ohm coil, the test was with a 4 ohm with same specs...
What do you mean?!
Is it a DVC Subwoofer with a 2+2 ohm dual voicecoil connected in series or a single voice coil

Quote:
Piston Diameter = 266.7 mm
Probably this is the measure of the cone (Surround/Surround) of a 12". Do you have a 10" or a 12"

Quote:
Dia = 250
Is this a 10" DVC Subwoofer with 10.10"/25.65cm Overall Outside Diameter

How much for the Sd parameter then.
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Old 14th January 2013, 12:30 AM   #12
ryuji is offline ryuji  United States
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largest diameter is about 12.5 inches, the 250mm is the cone

all i know is its 2.5 ohm nominal as it stands now. the earlier specs are out the window that was incorrect data he accidentally sent me

sorry for the confusion, i was rather confused myself

Last edited by ryuji; 14th January 2013 at 12:32 AM.
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Old 14th January 2013, 03:43 PM   #13
GM is offline GM  United States
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Specs calculated from basic T/S. Notice that the other specs line up close enough except BL, which if 20.5 would drop Qes, Qts quite a bit.

Xmax?
Le@ 1 kHz?
Pe [Rms, transient peak]?

GM
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File Type: gif LMS custom driver specs [ryuji] T-S.gif (13.9 KB, 43 views)
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Old 14th January 2013, 04:16 PM   #14
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Quote:
Originally Posted by ryuji View Post
the driver doesnt have any official name as it was custom made for me by a friend.
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Originally Posted by Inductor View Post
"The legendary TC9"... must be one of these ?!
Quote:
Originally Posted by ryuji View Post
largest diameter is about 12.5 inches, the 250mm is the cone...
TC Sounds LMS-R 12" DVC Subwoofer
Your driver must be this one then (same specs).
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Old 14th January 2013, 04:52 PM   #15
ryuji is offline ryuji  United States
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that does in fact match up near perfectly, the yoke looks the same, but the part that holds the diaphragm and the magnets look different.
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Old 14th January 2013, 04:52 PM   #16
GM is offline GM  United States
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If true, then the new set of specs published here are probably bogus since the custom has a 2.5 ohm coil.

GM
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Old 15th January 2013, 06:18 AM   #17
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Quote:
Originally Posted by ryuji View Post

Other info:
LMS coil technology 3" copper clad aluminum voice coil, single wind @ 2.5ohms, aluminum cone from a GZ plutonium sub, high roll rubber surround 12 spoke 12" basket, custom motor made from a 3 x .750" Y32 ferrite stack, TC9 T yoke with a full copper shorting ring pressed over the poll, TC7 top plate @ .500" thick (spec for LMS coil). Max power on that sub is around 600wrms but closer to 1000wrms
Very likely the "frankenstein" driver got an heavier cone (319.70 grams) vs. 280g, only one coil of the LMS (TC Sounds LMS-R 12" DVC Subwoofer) (2.52 Ohms) vs. 3.96 ohms. The basket is a "TC9" type (TC Sounds Epic 12" DVC Subwoofer)
How much did you pay?

Quote:
LMS coil technology 3" copper clad aluminum voice coil, single wind @ 2.5ohms, aluminum cone from a GZ plutonium sub, (spec for LMS coil)
TC7 drivers - 12" 2567
What is a TC9 ?

Last edited by Inductor; 15th January 2013 at 06:39 AM. Reason: TC7 vs. TC9
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Old 15th January 2013, 07:21 AM   #18
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TC9 drivers - 12" 2568
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Old 15th January 2013, 02:47 PM   #19
ryuji is offline ryuji  United States
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I didnt pay anything for the driver, it was a gift. He built it after i explained i wanted SQ not dB. the spare coil has a hourglass shape to it and only two leads but i think thats what makes it lms?
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Old 15th January 2013, 03:14 PM   #20
GM is offline GM  United States
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Bottom line is that without measuring its specs, any design will be a crap shoot.

GM
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