low bass response

Thank you all

my space is immutable, as is the cabinet…I am happy w the sound, just lacks lowest bass, <35 hz

no worries!

I think @yogiboy meant reverse the wires on just one speaker.

so, "hear" is a question I dont understand....I do understand that low frequency waves require space, but what I dont understand  is what is invovled in hearing and measuring them....for instance, if you put on a 20hz test tone, and put the db meter close to the woofers, should you be able to measure there, or only at certain distnaces?

Your speakers are not the problem, your room and it’s contents are IMO. If you like  nearfield listening, try moving your speakers on the long wall, way away from that large cabinet. You will be able to move the speakers out from the wall and you can move your listening chair as close as you want to the speakers. 
If you read Jim Smiths book on audio setups, he states not to put anything between your speakers, which include more transparent racks compared to your massive cabinet

You want in room frequency response.  Measure at the listening position and at various other places in the room.  You can use 1 meter directly in front of the woofer as a baseline measurement.

The big furniture probably does not effect bass response, but it definitely impairs soundstage info.  Though it does look nice!