@daveyf
I apologize, my vocabulary is failing me more than usual today. As with pretty much everything, personal preference is the determining factor but generally most people find that when integrating a sub into a system, the system sounds, for lack of better words here, cleaner, clearer and more detailed when using both high and low pass filters. You should also be able to, as Georgehifi states, run the system louder if you so desire.
I apologize, my vocabulary is failing me more than usual today. As with pretty much everything, personal preference is the determining factor but generally most people find that when integrating a sub into a system, the system sounds, for lack of better words here, cleaner, clearer and more detailed when using both high and low pass filters. You should also be able to, as Georgehifi states, run the system louder if you so desire.