How to select a subwoofer

Steve, your initial post states “deeper and tighter bass”, and your last one says “the bottom end is not quite as defined”. I do agree that simply adding a subwoofer will give you deeper bass, but if you are planning to run the Tyler’s full range, that lack of definition will still be present. How will adding a subwoofer improve definition of the Tyler’s, unless you use a high pass crossover to remove bass from the Tyler’s, which doesn’t make much sense for that speaker?

I might be chasing an elusive improvement.

I don’t think so, but do believe the wrong direction. The Tyler Linbrook Signature must be somewhat sensitive to speaker cables, as someone with these same speakers found out in this thread,

http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1369488445&openfrom&22&4#22

I am curious as to what amp and speaker cables you are using.