Would like to get more bass out of my B&W 801 series 2 speakers

@chessie I own a pair of 801 series 2 which look just like yours. But in your room, they look small; in my room they hulk up like your JBLs (see more below). While they may be a bit insensitive, I was told on this forum that due to their relatively benign phase angle, that they were relatively easy to drive to the point that my Rogue Audio all-tube Stereo100’s (100 wpc) could ‘make them sing.’ I’ve never tried that combination, but have bi-amped them in several ways, although currently drive them with two McIntosh solid-state MC252’s bridged to mono for 500 wpc. I don’t find that giving them access to more power gives them any more volume; although it seems to help the dynamics a bit. I added a bit of low-volume subwoofer which helped their extension a little.
All of which is to say that I don’t think the amplification is your biggest problem.
I think your biggest challenge is the room, as in, it is very large, at least to me. I can’t speak to the efficacy of room treatments, but they seem to be used more for ‘trapping’ excess bass, rather than enhance it, in an effort to curb room modes.
Now, if I could put my McIntosh XRT-20’s in your space, let me assure you— you would hear the bass! Then you might need to reach for the bass traps!

Big room needs big driver(s) to move the air. Then look at your amp if they have trouble providing the power required by the driver(s) you have chosen. Not to say the 801’s can’t get the job done, but worth asking the question, in my opinion.

Neat house. You deserve the bass you need. I paid less than half what I paid for the 801’s to obtain the XRT’s as they are not as highly regarded, but boy do they deliver good, rich bass from the bottom to the top of the range (using series 2 crossover). Some say their best feature is the midrange, while the engineer was proudest of the tweeter tower. 

@chessie I would like to second much of what

@livinon2wheels and others have stated above.

As you may be aware, the Series 2 was originally brought to market with an optional equalizer. The designer, as I understand it, considered the EQ essential to the speaker’s performance, because without it the ‘6th order Butterworth crossover’ was not implemented, and the 6th order Butterworth is advertised on the box the speaker came in. I suppose marketing thought the speaker on its own without the crossover was ‘good enough.’ Evidently, many customers thought so too.
All of which is to say that implementing a DSP is one way to augment the bass. As a Series 2 owner, I can attest to the rather anemic performance in the bass register, it just doesn’t seem to have much extension. What bass there is sounds good, but there just doesn’t seem to be as much as there should be.
For my part, I can que up my 70E Warfedales, with their 15” drivers, to get that next level of bass, although they lack the ‘punch’ of the 801’s.
Another thing I do is add a subwoofer in a corner of the room, even my mini-Velodyne works wonders.
The other thing I’ve often thought would improve their sound in my room was to get them up off the floor a bit so that the midrange and tweeter were closer to ear level. The original designer is on record as saying it wasn’t necessary to raise them, and that the only reason they offered the stands was for use in studios where the added height was needed for the sound to clear the mixing desk.
Anyway, those are my thoughts on the B&W 801 Matrix Series 2. I would still love to hear my McIntosh XRT-20’s in your space. They sound wonderful in my biggest room, which is much smaller than the room occupied by your 801’s.