Originally Posted by Jay1
I'm aware of who you are Bill, but that doesn't change the results.
In a sense, you are both correct. Many "car" subs do indeed have higher Fs and are designed for very small enclosures, with the idea that a cars interior will produce significant gain at LF to compensate. However
, not all "car" subs fit that criteria. As you point out (and obviously Bill is unaware of), there are several that do indeed have all the (T/S) parameters necessary (including low Fs) to be used in a "home" environment.
As long as you can disguise/hide the predominantly garish looks and "bling" factor.
Now WRT to using car speakers, like coaxes and triax's, this is rarely a good idea. The (vast) majority are meant to be listened to at significant off axis (like door mount) angles or even reflected (such as rear deck mount). Thus the upper frequencies tend to be designed significantly boosted to compensate (most, not all). Listened to on axis (like with HT), they will be very bright.
...but, the EQ of typical HT AVR "room correction/calibration, etc" may attenuate this enough to make it bearable. I think.