What's good sensitivity for a car subwoofer?

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From what I've read, 88 dB is about average sensitivity for a sub. Is that right? But I've seen subs rated at 92 dB and higher, although for at least one specific model, a forum post I read (not necessarily this forum) said the rating was BS because the manufacturer measured it including "cabin gain". How many others do that, I don't know.

Should I be expecting to find subs with a similar sensitivity to my other car speakers (92 dB,) or is less OK?

Some Kenwoods I just found on ebay are rated between 91 - 93 dB. Any opinions on Kenwood subs?
 
Agreed, cabin gain is going to account for a lot in the small confines of a car. so 85-90dB is generally sufficient. The main advantage to higher sensitivity is less distortion, both speaker and amp generated, and horn-loading is the only way to get very high sensitivity. I'll have a horn loaded sub or two suitable for autos appearing on my site over the next few months.
 
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