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Another Driver ID Help Please...

baco99

baco99

AK Subscriber
Subscriber
I picked up some drivers with limited markings. Anyone have an idea what these are?

12" subwoofers with MASSIVE magnets. Cast alum basket. Vented pole piece. Coated paper cone. Rubber surround.
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10" woofer (subwoofer?). Stamped and powder coated basket. Vented pole piece and bumped back plate with a flared exit. Poly cone, foam surround.
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And I still need help with this one too... 5-1/4 mid bass.
http://www.audiokarma.org/forums/showthread.php?t=566913
 
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12 inch woofer is an Eminence made in 1994, probably new enough that you can get the specs from them by giving them that 121XXX number.

Sorry, i can't be much help with the others.
 
bowtie427ss said:
12 inch woofer is an Eminence made in 1994, probably new enough that you can get the specs from them by giving them that 121XXX number.

Sorry, i can't be much help with the others.
Click to expand...

WOW! Good call. The basket looks like a Definimax series, but the cone assembly is totally different.

Did Eminence do OEM assembly for other car audio manufacturers like Xtant, etc.?
 
baco99 said:
WOW! Good call. The basket looks like a Definimax series, but the cone assembly is totally different.

Did Eminence do OEM assembly for other car audio manufacturers like Xtant, etc.?
Click to expand...
Eminence does OEM's for everybody, pretty much how they started in business.

I would bet their customer list is pretty expansive.
 
Eminence responded right away on that 12" monster driver:

Hi Brian,

We did manufacture the speaker. It was a custom design that we manufactured to one of our customer’s specifications. I am very sorry, but I am unable to find any specifications on it in our archives.
Click to expand...

I have asked if they could direct me to the customer so I can ask them what the driver would have been used for.

If I cannot get specs, is there a service that will test this driver and generate a report with T/S parameters so I could design an enclosure for it?
 
Turns out that Eminence can't help me out any further. They can't divulge the customer's info to me, and they have no way of contacting them since they went out of business a few years ago.

So, looks like I need to have this driver tested in order to determine its best use.
 
I found the info. The large 12" subwoofers are Renaissance MR-12s. Here are the specs.

Mounting Depth
5.25"
Power Handling (RMS) 300 Watts
Come Material Specially treated paper
Frequency Response 28 - 300 Hz
Resonant Frequency (FS) 29.85 Hz
Sensitivity 1 watt/m 93.5 dB
DC Resistance (RE) 3.39 Ohms
Mechanical Q Factor (QMS) 9.78
Total Q Factor (Q/T) 0.28
Equivalent Cas Air Load (VAS) 156.71 liters
Xmax
5.50mm
Le
0.96 mH
BL
12.38 T*m
Mms
68.75 grams
Cms
0.4135 mm/N
SD
519.45 sq. cm

These were made in the USA by Eminence, for Renaissance for car audio use. They sell for $399/ea.

http://www.renaudio.com/carstereo/WR-12.htm
 
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