Image Dynamics has just come out with an ID8 v.3 with a supposed 15mm X-max (one-way) for $109 on Sounddomain. The box requirements are very small at a minimum of .2ft^3 sealed or .5ft^3 ported. I've been unsuccessful at locating the T/S parameters, in particular its QTS, as it might be
the choice for a rear deck subwoofer(s). It's available in dual 2ohm or dual 4ohm VC configs.
Another
very interesting 8" subwoofer is JL Audio's new 8w7. It's got a 19mm X-max (Yikes!) and a QTS = .612 (great for free-air, like the rear deck). The box requirements are also pretty reasonable. Its biggest drawback is its price at $300+ each.
I'm pondering a pair of ID8s or a single 8w7 for the hatch of my RX7. Anyone with any thoughts on either sub or other possibilities of an extremely long-throw 8" sub with smallish enclosure requirements?
I kinda thought about Kicker L5/L7s, but the idea of a square sub just seems strange.