Can cables of any cost and quality provide bass response missing in my B&W speakers?

@compass_rose - If you look at the spec of this speaker it would appear that they only provide a low frequency of 38 Hz

I would ask how low do you want to go? 

Unfortunately, no cable will assist in getting lower than 38Hz - you will need a subwoofer for that.

These speakers are approaching the limit of what a 6.5" woofer can deliver. Changing to a speaker with 8" woofer could get you down to around 28 Hz and a 10" woofer even lower.

I have Tannoy speakers with a 6.5" woofer (delivering low of 32Hz)  on my A/V system and they lack the bass of the speakers in my Audio system which has an 8" woofer - with a low of 28Hz

Having said that, one speaker cable that does perform exceptionally well and will allow your speaker to perform at their optimal level is the gZero6 from KLE Innovations.

I highly recommend them and have reviewed them at length - see...
http://image99.net/blog/files/228f7609149d575dd8dd8d956511e7c2-57.html

There are other models of cable, but the gZero6 offers the best bang for the buck for your speakers.

If you would like a speaker cable more reasonably priced - try the gZero2. It outperformed my Van den Hul d352 10 gauge cable - providing a more detailed, faster and deeper bass.

See...
http://image99.net/blog/files/fac35e44c003d559714cdd73d86febf9-51.html

Also, If you do order either cable - ask for their Classic Bananas to be installed. It will probably be the last speaker cable you buy

Regards - Steve

@compass_rose - RE:

auxinput...so, how about just using No. 10/2 Romex cable...single Cu conductor, solid, unstranded? I have about 50ft left over from running 240V service for a wall heater...always curious how simple electrical wire would work in home stereo setup. Also, there is a stranded version as well - THHN #10, 19-strand pure Cu...cheap enough at Home Depot...not being sarky, a legitimate query.

Yes - it will work, but do you want the best out of your system?

How well it works depends on the origin of the wire. Not all Romex is equal

Good Cables are designed to combat many EMI/RFI effects within the cable itself - Romex is not - the result is a "smeared" sound that lacks clarity, details, dynamics AND (guess what) bass extension

But give it a whirl and then try a good cable - the difference should amaze you.

Despite many opinions to the contrary - a thicker gauge is not always better - I was using 10 gauge - I now use 16/13 Gauge (i.e. Signal/Neutral conductors) AND I get better bass performance than the 10 gauge.

It’s all about the cable geometry - i.e. how the conductors are positioned with respect to each other AND the gauge of the signal and neutral conductors - it is best if the neutral is a heavier gauge than the signal.

It’s taken me a couple of years of tinkering with cables to come up with this approach on my Helix cables, I even tried Romex (not good), so I speak from experience.

The cables I recommend in my post above are extremely good performers. There is little difference between them in sound quality. One is commercially available, the other is a DIY project.

But feel free to try the Romex - you may not hear the difference, which would save you a bundle

Regards - Steve