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View Full Version : Whats the point of Huge VC on low RMS speakers?



splduck1978
03-13-2009, 05:23 AM
Took a trip to the little boys room and was checking out my Parts Express Catalog and saw some Morel 6" drivers with 3" Coils. There is also a 10 and 12 that uses a 5.1 inch Coil. The RMS on the 6" is 150-300 and the 10's and 12's 500-1200. Whats the point of the huge Voicecoils?

pr-festiva
03-13-2009, 05:29 AM
maybe to keep the heat down so it wont change the parameters of the driver as much,audiophile stuff. not sure though

hornedfrog1985
03-13-2009, 05:32 AM
Probably so noobs don't blow them, and then spam the interweb saying how their products *****.

GAM3OVR
03-13-2009, 05:40 AM
Tw5 uses a 6" coil no?

shaneb
03-13-2009, 05:46 AM
Better heat dissipation, higher quality

hornedfrog1985
03-13-2009, 05:51 AM
Home stuff costs insane amounts of money, the least they can do is overbuild the driver a little.

Edit: Guess I'm assuming this is home audio stuff?

James Bang
03-13-2009, 02:30 PM
I don't see anything wrong w/ that...

Haunz
03-13-2009, 02:52 PM
Lower inductance, greater BL, better cooling.. there are only advantages to using a larger dia. coil even with the same amount of copper..

My Opti 6.5" mids have a 3" voice coil.. :cool:

James Bang
03-13-2009, 03:58 PM
mounting depth can be a benefit. check out the coil on the JL slim sub.

buggsson
03-13-2009, 08:11 PM
Home stuff costs insane amounts of money, the least they can do is overbuild the driver a little.

Edit: Guess I'm assuming this is home audio stuff?

You are incorrect, it is car stuff! And they are not that expensive compared to the competition.

squeak9798
03-13-2009, 08:29 PM
Lower inductance, greater BL, better cooling.. there are only advantages to using a larger dia. coil even with the same amount of copper..

My Opti 6.5" mids have a 3" voice coil.. :cool:

Le would be higher for a larger diameter coil due to more wire being in the gap.


But as was said....even though it's "low power" compared to a subwoofer, a larger diameter coil can improve power handling (and more importantly reduce power compression). Also, the diameter of the coil affects how the former attaches the cone, which can affect cone resonance and stability.

RAM_Designs
03-13-2009, 08:35 PM
Just because it uses a 3" coil doesn't mean that it's built like a 3" coil that's on subwoofers. The coils on a mid doesn't need to be as long, and I doubt here are many, if any, mids that have 4-8 layer coils with as thick of wire as normal subs use.

Larger coil also means lower sensitivity(assuming the overall mass of the coil is higher).

bones22
03-13-2009, 08:39 PM
Tw5 uses a 6" coil no?

the 12 used a 5 or 5.5 if i remember right
the 13.5 is a 7

mcsoul
03-13-2009, 09:16 PM
A different pair of 3" vc morel mids (not uniflow) reviewed
poorly on Zaph because according to the review, there was
not enough spider to back it up.

Haunz
03-14-2009, 11:25 AM
Le would be higher for a larger diameter coil due to more wire being in the gap.


why would there necassarilly be any more wire in the gap ? If both are underhung that wouldn't be the case, and if they were overhung the topplate would be different, accordingly...

that said you are either making arbitrary statments or compairing apples to oranges... If you look a the coils alone a shorter wrap on a larger dia former will have less inductance, which is my point...

audioarsonal
03-14-2009, 12:50 PM
Larger diameter coil means more copper in the gap period.One winding of a 4" coil will provide more copper in the gap then a 3" coil with the same winding.