Thanks to all contributors to this post.
I finally installed the Audio Ordinance B-8PT under the driver's seat. Fits like it was designed to go there, although a minor trimming of the (plastic) heater duct was required...half a minute with a utility knife.
Sounds great...never even approach max power on the wired remote, which is stuck to the side of the center console just under the hand brake button using the provided double-stick tape. It took quite a few sessions adjusting the sub's controls and coordinating with the settings on my Clarion CX-501 HU.
One reason for landing on this particular sub is that "Audio Ordinance" is a project of some Crutchfield employees so I'm confident of good customer service going forward.