Originally Posted by mdocod
I'd see if you can find another 2 pairs (for 7.1 or 1 more pair for 5.1) of similar vintage B&W 600 series to match what you have there on the used market. Some 602s up front, your current 601s plus 2 more in the sides/back, I can't recall the model "#" of the center for that series at that time but i think there were 2 models in that range maybe??, if so opt for the larger option if possible. Depending on the size of the current sub, perhaps a second sub to help fill out the bottom end. The "bookshelves" all around can be pretty competent if the bottom end is taken care of by the subs. The only problem with this approach is that I believe most of the older DM600s (and for all I know, perhaps even the newer ones) used electrolytic caps in the x-overs that may, after this many years, have shifted in value to the point that they are no longer as accurate as they once were. Replacing caps might not be a bad idea to "breath some new life" into the aging x-overs.
As far as the signal processing and amplification. Depends on budget? I'd want a reasonably high end receiver (~$1000+?), or a processor and separate amps to complement the B&Ws.
i am currently using a pioneer amp/reciver, and a kenwood amp/reciver to throw out 4 channels of sound, (they are both stereo amps, but im taking sub out from PC to kenwood and driving just the low end with that.
i really like the DM600s and they havent really dated, everyone comments on them
(got the black ash ones)
i might just get some floor standers and a center for more dynamic fill.