right now, I am using an altec lansing ACS45.1 speaker system [from the 90's which just refuses to die]...
3" full range driver + 6.5" sub (42hz extension - as per specs - f not specified)
I changed that setup with the JBL satellites which sport dual 3" drivers, 1/2" tweeter and a 10" sub. I heard a lot of new detail and things I didn't from the altec setup (counter strike)
But the problem was the subwoofer was at the left side of the table ... I could hear the boom coming from behind me left side which could have been caused by:
1) the bass was being reflected OFF the PC table
2) crossover of 90hz was too high
3) that JBL sub is simply crap
by buying a new speaker with lower extension (i might even be able to beat the altec system with just the bookshelves), I figure I can solve the crossover problem. I can also solve the crappy JBL sub problem if I use one of my hogillion subs
for the first problem I'm considering DIYing two Rockford 10" sub drivers I have under the table right in front of me ... but this is gonna have to wait til I buy the new speaks and after my honeymoon.