Technical information ~ Listed
BM 12"
Cone
The
diaphragm of the BM mkIII is made up of two pieces of composite material.
The bottom, un-seen, piece has a plethora of duties, which includes
it being a stiffening disk for the upper diaphragm. It also centers
the voice coil as well as the top diaphragm. And finally, it offers
over 15 square inches of glue surface area for the assembly while also
sandwiching the inside edge of the surround.
Spider
Suspension
linearity is achieved on the new BM mkIII by a massive 10” diameter
Nomex spider with woven-on tinsel leads. Suspension non-linearities
negatively affect the performance of a loudspeaker, so we wanted to
make sure that the suspension on the BM mkIII was as linear as possible.
As you can see from the suspension plot below, the suspension “curve”
isn’t a curve at all – it’s as close to a straight line as possible.
Motor
At
the heart of the BM mkIII lies the compact, XBL^2, neodymium 10 ring
cluster motor. Keeping BL more linear with an XBL^2 motor in a loudspeaker
keeps distortion down and your T/S parameters more stable. To read more
about how our XBL^2 motors out perform other motors click here. (use
this document for the link on the words “click here”: http://www.stereointegrity.com/Files/XBL2TechPaper.pdf
) The 10 ring neo motor increases BL and sheds weight compared to a
normal ferrite magnet slug. The last item in the motor is a shorting
ring nestled directly in the gap, which reduces and stabilizes inductance
for better sound quality.
Technical information ~ PDF download
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