Fi BTL/ SSA Xcon Cone shaped Motors

[jrod1050 5]

The motors on these woofers look almost identical. I know both woofers are made out of the same build house. Is there any difference in the motors? I know Xcon is more of a sound quality woofer, Im a owner, and the BTL is more of a SPL woofer. Is it the soft parts and the coil that make them sound different? Please excuse my ignorance on the subject.

[Duran 387]

The motors themselves are actually very different, there are cosmetic similarities but that's as far as it goes. XCON's have a shorting ring inside the motor to lower inductance so the woofer can play lower than without, the large bumped top plate is mostly so the coil has enough travel, allowing the XCON 31 mm of xmax one way.

The BTL however while looks similar is totally different on the inside, if it is fully loaded there is no pole vent, and axial cooling vents drilled into the pole piece and top plate, along with a small gap to increase air velocity in order to cool the coil, the BTL will take serious power before failure, it is actually impossible for the coil to hit the top plate, making "bottoming out" impossible. The Spiders will rip and the tinsel leads will pop before the coil hits the top plate.

[Aaron Clinton 2,372]

Nice post Duran.

The BTL and Xcon look similar, but as explained above they are different. For example, the Xcon has a shorting ring to lower inductance ( a feature more set for the SQ or daily driver crowd) and the BTL does not. The reason is the BTL is aiming to keep as much motor force as possible for big power installs. Both are excellent drivers, but they are built for different applications. The top plates are different, the height of the magnets, along with their inner and outer diameter is different. So from a far, they make look similar, but next to each other, the difference is noticeable. Both are at the top of the game at their respective market segments, but are not meant for the same application.

[Duran 387]

I concur with denim's post

[Aaron Clinton 2,372]

I did not mention the differences in coil, former, suspension, dust cap (over all moving mass and inductance), cooling, etc. etc.

[jrod1050 5]

Thanks for the explanation guys