Great specifications. 300W RMS. Beware - SPL is rated at 2.83V - subtract 3dB from the 93 dB SPL values to compare to subs with dual 8 ohm voice coils with 1W input. Full 0.5" cone excursion.
Two of these wired in series then together in parallel will present a 4 ohm load to your single channel amp. You could also wire each in series to present an 8 ohm load to a 2 channel amp.
Infinity is better known for clean sound than sheer volume or power handling, but in a car, these will just rattle your bones with even a modest amp and a ported enclosure.
I bought four of these for a home theater setup. Total was just under $180 shipped. (I know, I should have placed two separate orders and saved more $). Next best looks like Buy.com for $75 each incl. shipping.
Decent sounding sub for a very good price. They won't take a lot of abuse (in other words, the 300wrms rating is fairly accurate - I melted the coils of one giving it about 350wrms), but they're good for daily use for anyone who wants to fill in the low end for every day listening.
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