In general, I agree with all responses here in that it's all about setup when integrating subs into a 2-channel system. If the setup is not done properly, one will feel that subs will not bring any appreciable or beneficial results when the sound is ruined further. If the setup is done properly, one will be amply rewarded by the full extended bass that the main speakers fail to reproduce. The key is countless of hours of trial and error and patience with a wide variety of listening material, and a reasonably good set of ears.
