LMS Ultra 5400 voice coil - AVS Forum
DIY Speakers and Subs > LMS Ultra 5400 voice coil
harrikuk's Avatar harrikuk 02:40 PM 04-29-2012
Hi,

I received my LMS Ultra 5400 earlier this week, but I noticed a weird gap in the "pipe" inside the voice coil, it doesn't wrap completely around.

As I don't really have much experience with subwoofer drivers I don't know if that is normal or not. Should I contact TC Sounds about it, or is that gap supposed to be there?
LL

BassThatHz's Avatar BassThatHz 03:41 PM 04-29-2012
Quote:
Originally Posted by harrikuk View Post

Hi,

I received my LMS Ultra 5400 earlier this week, but I noticed a weird gap in the "pipe" inside the voice coil, it doesn't wrap completely around.

As I don't really have much experience with subwoofer drivers I don't know if that is normal or not. Should I contact TC Sounds about it, or is that gap supposed to be there?

Supposed to be there. If it was whole it would have higher back EMF as it would be a solid circular conductor.
DL86's Avatar DL86 01:23 AM 04-30-2012
Mine has the same. I have had no problem whatsoever.
notnyt's Avatar notnyt 01:41 AM 04-30-2012
normal.
harrikuk's Avatar harrikuk 07:21 AM 04-30-2012
Thank you very much for the information, big relief

My plan is to build most likely a ~85-100 liter sealed box for the sub. But I'll borrow an existing suitable thread (or make a new build-thread) once I get those designs sorted out.
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