Hmm, I'm not running normal computer speakers, as they cut so many corners, so I'll try and describe how I've got my PC soundsystem.
PC optical out from motherboard ->
Toslink switch (source selector basically) ->
DEQ2496 (Does BSC along with a few small EQ tweaks) ->
DCX2496 (Modded with passive output, as the active stage is nasty. Running as a 2 way active XO with sub channel if I need it) ->
Stepped attenuator volume control ->
2 x TK2050 amps (Modded with high current chokes and better input caps) ->
Event TR8 Studio monitor type speakers (With the active stage bypassed as it's awful)
While it's not exactly a simple setup, once you get the DCX and DEQ tweaked, it's easy to live with, you've just got to turn on the DCX before the amps and away you go.
