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I have been keeping this drivers development very close to the chest for many months but I think now is a good time to release information about this very unique woofer. I am extremely excited about the woofer and while there are still a few details to iron out the design is very close to coming to fruition. Tooling has begun on almost every part so here are details and pictures:
First thing to get out of the way are key elements / design criteria for this woofer. My goal with this driver was to unleash the coolest, baddest, shallow'ish woofer. Using the BM mkIII and mkIV as inspiration yielded the following:
12" diamter subwoofer
Solid neo slug XBL^2 motor
Full length copper pole sleeve for reduced inductance
3" diameter, 6 layer, copper windings Dual 2 Ohm voice coil
18mm Xmax with 24mm Xmech (both are one-way measurements)
REV surround for excellent linearity and extended diaphragm travel ability
Aluminum reverse diaphragm carrier for increased clearance which will yield increased peak throw ability
Aluminum dome cone/diaphragm
Completely modular aluminum basket
8 3/8" nomex spider
Modular aluminum spider carrier that will also bolt to the motor for a unique look
Mounting depth of under 4.0" (3.95" mounting depth)
The woofer will still work in a 0.5 ft^3 sealed box as the BM mkIV while having a better Qtc alignment with the same extremely deep bass extension capability.
Pictures:
This reverse carrier and dome are no taller than the surround on the BM mkIV so mounting clearance is not hindered. Here you can see where the coil attaches to the center of the carrier with five stiffening arms that lead out to the surround landing:
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Here is the carrier mated with the REV surround:
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The dome applied to the carrier:
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The modular basket arms mated to the spider landing and motor carrier:
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The modular mounting lip attached to the latter:
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Motor attached to the latter:
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The carrier added in position:
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Everything assembled and a cutaway added to the drawing:
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Fully assembled hard parts:
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Ignore the colors of the pieces in these drawings. The colors are there to separate the pieces for easier part isolation. I am toying around with the idea of either making painting or anodizing the dome a specific color prior to assembly for an extra fee. The driver will come with a polished aluminum dome with the Stereo Integrity logo "printed" (it will look more like the logo has been sand blasted) on the dome for production. But again, I may offer customized dome finishes or colors. For the modular basket I am going to look into a gunmetal grey anodlized finish.
You are seeing the assembled image correctly - the basket arms do not meet up with the motor. It is like that on purpose. The motor will look like it is floating inside the speaker but the motor will be supported by the arms of the spider landing / motor carrier.
This driver will not be a $1000 driver. I am also not going to give them away. I hope to meet a price point of $500 for each woofer. Hopefully lower but I know a price for sure once all the parts are finished being tooled and I have everything in hand.
If things go well I hope to have two finished prototypes by March or April 2015.
First thing to get out of the way are key elements / design criteria for this woofer. My goal with this driver was to unleash the coolest, baddest, shallow'ish woofer. Using the BM mkIII and mkIV as inspiration yielded the following:
12" diamter subwoofer
Solid neo slug XBL^2 motor
Full length copper pole sleeve for reduced inductance
3" diameter, 6 layer, copper windings Dual 2 Ohm voice coil
18mm Xmax with 24mm Xmech (both are one-way measurements)
REV surround for excellent linearity and extended diaphragm travel ability
Aluminum reverse diaphragm carrier for increased clearance which will yield increased peak throw ability
Aluminum dome cone/diaphragm
Completely modular aluminum basket
8 3/8" nomex spider
Modular aluminum spider carrier that will also bolt to the motor for a unique look
Mounting depth of under 4.0" (3.95" mounting depth)
The woofer will still work in a 0.5 ft^3 sealed box as the BM mkIV while having a better Qtc alignment with the same extremely deep bass extension capability.
Pictures:
This reverse carrier and dome are no taller than the surround on the BM mkIV so mounting clearance is not hindered. Here you can see where the coil attaches to the center of the carrier with five stiffening arms that lead out to the surround landing:
Here is the carrier mated with the REV surround:
The dome applied to the carrier:
The modular basket arms mated to the spider landing and motor carrier:
The modular mounting lip attached to the latter:
Motor attached to the latter:
The carrier added in position:
Everything assembled and a cutaway added to the drawing:
Fully assembled hard parts:
Ignore the colors of the pieces in these drawings. The colors are there to separate the pieces for easier part isolation. I am toying around with the idea of either making painting or anodizing the dome a specific color prior to assembly for an extra fee. The driver will come with a polished aluminum dome with the Stereo Integrity logo "printed" (it will look more like the logo has been sand blasted) on the dome for production. But again, I may offer customized dome finishes or colors. For the modular basket I am going to look into a gunmetal grey anodlized finish.
You are seeing the assembled image correctly - the basket arms do not meet up with the motor. It is like that on purpose. The motor will look like it is floating inside the speaker but the motor will be supported by the arms of the spider landing / motor carrier.
This driver will not be a $1000 driver. I am also not going to give them away. I hope to meet a price point of $500 for each woofer. Hopefully lower but I know a price for sure once all the parts are finished being tooled and I have everything in hand.
If things go well I hope to have two finished prototypes by March or April 2015.
