I have owned these amazing speakers for over 30 years and they still are a treasure. Replacing the foam surrounds on both the active and passive woofers are necessary, but well worth the time and investment. When I first purchased them, little was known or publicized about an additional speaker, something called a sub-woofer. It is really the missing component to these heirlooms. I actually had placed them in storage for the past 6 years, not having the location to properly use them. During that time, I have learned to both appreciate and admire the function of a GREAT sub-woofer to complete the sonic range of these speakers. When I recently moved I knew these speakers would come out of storage, and I would be able to, not only hear their remarkable clarity and range, but have the missing subwoofer added to the set. I was apprehensive hooking them up to a new Pioneer Elite AV unit, and the Dayton 15" / 850 watt sub that I had put inside a JBL subwoofer box. I put a couple of different style CDs in the player and hit PLAY. Euphoria! That missing musical/ bass element that I knew should be there materialized... and I was in sonic heaven. Ahhhhhhhhh YES ! And, yes, I have the JBL center speakers available.... but these L150A s and the sub woofer, by themselves are perfection. Hang on to them, you will NEVER find their match in most folk's price range. Thanks for bringing up the topic.