I'm putting it out there looking at opinions on lower cab speaker selection. Impedance matching aside I'm trying to figure out what is optimal for the application. The first thing that I would think is mid and high frequency sounds are far more directional than base so a woofer would be the best option since the speaker points at your toes, but then looking at subs that are constructed with massive permanent magnets and thick cone suspension in order to be driven hard and produce extremely low frequency sound and vibration it seems to come at the cost of efficiency. I'm not sure sub sonic vibration is what the main objective is here. My experience with old jukeboxes using full range speakers driven by a mere 16 watts indicate that power is not always equivalent to performance and speaker efficiency can't be underestimated.
My thoughts are a more modest full range speakers is going to be a better fit for this application as it isn't attempting to dampen vibration associated with sub sonic frequencies I'm likely not looking to prioritize. I also want to make use of the modest power available without installing some high powered amplifier just to overcome inefficiency to obtain something I'm not aiming for in the first place.