If you want more bass from your 4sr take some of the Dacron out of the bass cabinet. Your owners manual has instructions on this. The bass is always adjustable. For those who want less bass you put more Dacron into the bass cabinet. Do not put anything into the port only the cabinet.
Add a subwoofer to Von Schweikert 4Srs?
I'm currently using VS 4Srs after upgrading from 4 Jrs late last year. They are (finally) getting broken in and really singing. No complaints except I'm longing for a little more low end. I'll admit it...I'm a bassaholic but I don't like that home-theatre-low-rumble without a cause sound. Never owned a sub. Any recommendations (besides seeing a therapist)? The best woofer I have heard to date and would proud to have in my system was a Talon I herad at last October's RMAF. My appreciation in advance.