Model
Fi Car Audio IB3 18 S4
Rating
DIAM
FS(Hz)
VAS(l)
QTS
PWR(W)
SPL(dB)
IMP(Ohm)
avb
+0 alanr
28 Jan 2020, 03:07
Advantages
Used in a Infinite Baffle (IB) configuration in my attic, with sound going to living room below. Smooth, effortless response - even when shaking the house. With most music, my amplifier doesn't even light its first signal level light to give solid bass. When used in an IB config, there is also no audible coloration or boom. The frequency response is flat from somewhere around 25 hz well long above normal subwoofer range. They are made on demand in the USA, and are available in 4 ohm and 2 ohm versions. Incredible 34 mm xmax - and yes, I've seen that kind of excursion. I'm using mine facing each other in a down-facing manifold, which gets a measured extra 3db of sound (like doubling amplifier power). Reasonably priced for a 600W 18" subwoofer.
Disadvantages
Since they are made to order, you have to wait to get to the top of their queue for them to make yours. This can take a week or two.
Total
Couldn't be more pleased. Well worth the few days wait. Also could not be more pleased with how simple the IB setup is (barring attic logistics - which weren't that bad in my case).
Rating