We have a new email specifically for the new IB series subwoofers from Fi. Any questions regarding the new 18" and 15" can be directed to
IB@FiCarAudio.com. Hopefully this will eliminate some of the back up of IB emails being caught in the flood of regular car audio emails.
The new IB 18 features a 3" coil and a triple stacked motor specific for the IB application (smaller than the older Q series modified IB drivers and a little more purpose built overall).
Specs are:
Re 1.5 Ohms (single 2 Ohm coil)
Le .87mH
Fs 22.9 hz
Qms 3.25
Qes .79
Qts .63
Vas 381 l
Mms 258 g
Sd 1210 cm^2
Spl 89.4 1W/1m
Xmax is 30mm and suspension and motor limit right about at the same time.
At about 500-600 W it hits its linear limits at 20Hz. Power needs will vary accordingly.
These subs are $209 each shipped in the lower 48 States and for orders of 4 or more they are $199.
The smaller 15" IB sub features a 2" voice coil and a purpose built triple stack motor. It is rather efficient for an IB driver and has a very low inductance.
Specs are:
Re 1.6 Ohms (single 2 Ohm coil)
Fs 24.4 Hz
Le .72 mH
Qms 4.00
Qts .77
Qes .64
Vas 269.5 l
Mms 145.4 g
Sd 810 cm^2
Spl 90.0 1W/1m
Xmax is 22mm and is suspension limited (Xmag is 24mm)
Subs are linear limited at about 250W at 20Hz.
These subs are $129 each shipped in the lower 48 States and for orders of 4 or more they are $119.
