Used them both, yup, years ago. Know the difference, too..The 140's WERE punchy for the bass guitar....but...the Fs is 40hz....not the F3....in any kind of alignment that would give even half way decent bass, with the qts of...what is it .21??? It just has no low end, or floor shake..and that's what bass is all about in a sub, I think..I am a celestion 12 fan, so the 130's did nothing for me except for clean stuff...and they are great for that.
I wasn't trying to do anything but save him some time...if he was looking for bass, free in a dumpster, or not....there isn't much there...
I think the best I got at the time was about 4.5 cu ft with a pair of them, tuned to 45 hz or something....clean, punchy, clear....and no bass.
The E155's were another story....and a bigger box to carry...and they weren't free in a dumpster, either...