I'd bet your problem has less to do with the floor surface than the fact that you have your speakers too close to the wall behind them (an assumption based on your stated dimensions and listening distance). The listening position could also be responsible for the bass problems as well. As an experiment try moving your speakers out a bit further, closer together, and/or move your chair out from the wall, and see what happens to your bass.
While I doubt that the flooor surface is making the difference you are hearing you can easily check this out by simply slipping a piece of plywood under each speaker to simulate a hardwood floor and see if you can hear a difference. Bass waves propagate differently than higher frequencies, but give it a try. If nothing else it will satisfy you that this is not the problem.
FWIW I'm aware of Dunlavy's set up theories regarding his speakers, however, if you can, think outside his box and try setting them up on the short wall using something like the Cardas System, or the Cara program on Rives' site, for a guide as to where to first locate your speakers and listening seat. This would just be a starting point - you adjust from there. You might be surprised AND like the results.
Oh, have you actually taken SPL readings in your room to determine room nodes and nulls, etc. I've found it really helpful to use an SPL meter and a test disc with 1/3 octave pink noise in determining where the best locations were for bass performance and or determining where there were room problems which could, or could not, be solved.
Good luck in solving your issues..........
While I doubt that the flooor surface is making the difference you are hearing you can easily check this out by simply slipping a piece of plywood under each speaker to simulate a hardwood floor and see if you can hear a difference. Bass waves propagate differently than higher frequencies, but give it a try. If nothing else it will satisfy you that this is not the problem.
FWIW I'm aware of Dunlavy's set up theories regarding his speakers, however, if you can, think outside his box and try setting them up on the short wall using something like the Cardas System, or the Cara program on Rives' site, for a guide as to where to first locate your speakers and listening seat. This would just be a starting point - you adjust from there. You might be surprised AND like the results.
Oh, have you actually taken SPL readings in your room to determine room nodes and nulls, etc. I've found it really helpful to use an SPL meter and a test disc with 1/3 octave pink noise in determining where the best locations were for bass performance and or determining where there were room problems which could, or could not, be solved.
Good luck in solving your issues..........