How many people would be interested in a good IB subwoofer?
I have a once in a lifetime chance for those interested in purchasing an IB sub. We had a slight goof on a production run which has a wee bit too stiff of a suspension for our original goals. Our choices are to send them back to the build-house and have them rebuilt or offer them at a blow-out price of $155 & $160 (includes UPS GND shipping within cont. USA) for those interested in an IB. My build-house is giving me a good break because it was their mistake. Compare this to the Dayton Audio IB Subwoofer @ $120 with less than half the available excursion (which you will need with an IB sub) and you will find this is an unbeatable value. Twice the output and a much lower distortion motor for an extra $5 is a screaming deal.
These are based upon the Adire Audio Brahma motor so they have a healthy 26-27 x-max with the XBL^2 motor highly optimized in its fourth generation.
These are all dual 8 Ohm VC so they would offer resistively damped operation if you needed it. They are stadard 12-spoke cast baskets with good parts. I intentionally made these non-flashy designs. They are directly out of the mold of the old Shiva/Tempest (which was our original design goal) which was all business and no goofy marketing gimicks. If you want fuzzy dice on your woofer these are not for you.
T/S from a production sample broken-in for 3-4 hours at 50% excursion. Measurements are with VC in parallel.
Re: 3.95 ohm
Qts: 0.578
Qes: 0.673
Qms: 4.095
Fs: 24.5hz
mms: 130g
cms: .300mm/N
BL: 11
Vas: 284L
I have a good stock (>50 units) but they won't last long at this price. I'll put them on my web site Monday morning for those interested.