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Old 09-20-2015, 02:27 PM
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Default Measuring parameters to do common chamber

I have always thought that the eD SPV.3 and the Crystal Mobile Sounds CMPx2 are the same sub.
The published specs are close, they look almost exactly the same except for spider color, and dust cap.

The CMPx2 is only used for like 12 hrs on HT use and still stiff.
The eD was sitting in my closet new (recone was new) for 5 yrs and in my car on 2+K for like 4 months and seems to have a lil spider sag from gravity.
Here are the specs, can they be sed in a common chamber?

CMPx2 specs:

re 1.525 ohms
Fs 25.57 Hx
QTS .4897
QES .5302
QMS 6.412
Le.6719 mH

SPV.3 specs:

Re 1.489 ohms
FS 24.9 ohms
QTS .4452
QES.4765
QMS 6777
LE .6008

Measurements taken with DATS coils in parallel
Not sure why I dont have BL etc...but I read I have to use WinIsd pro to get those.
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Old 09-20-2015, 08:05 PM
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The Crystal is a little more electrically compliant; the eD is a little more mechanically compliant. I've seen drivers that were from the same line/manufacturer that had more TSP variance, lol. Unless you're pushing them to the ragged edge (like where one more mm of excursion would bottom the coil) you will be perfectly fine.
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Old 09-20-2015, 08:09 PM
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Quote:
Originally Posted by SPLEclipse View Post
The Crystal is a little more electrically compliant; the eD is a little more mechanically compliant. I've seen drivers that were from the same line/manufacturer that had more TSP variance, lol. Unless you're pushing them to the ragged edge (like where one more mm of excursion would bottom the coil) you will be perfectly fine.
I thought so, and thanks for the confirmation.

What about the eD with its 1/2" spider sag, well maybe less.
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Old 09-20-2015, 08:11 PM
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I'd watch it under power just to make sure it's not going to hit mechanical limits, but if it looks good let it roll.
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Old 09-20-2015, 08:15 PM
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Quote:
Originally Posted by SPLEclipse View Post
I'd watch it under power just to make sure it's not going to hit mechanical limits, but if it looks good let it roll.
Ive been pushing it already without even knowing that.
It sat on its motor for several yrs, and thats why its sagging I think, but The original spiders were sagging when I got it, not to mention torn at T/J.
So the spiders might have been its weak link anyway.

I was more wondering about the fact that the coil is out of alignment, does that cause any parameter shift or anything?
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Old 09-20-2015, 08:17 PM
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I am going to mount it ass up for a while and see if that changes the spider sag, but I am already almost sure it wont.
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