Bob M

I just looked at the S/Ns again. Each speaker has a white (yellowed) paper label that looks pretty official. Says "Klipschorn Loudspeaker Systems" Then "Type" KB-WO (Hand Written) Then "Serial" and hand written is: 125255 (or 125256) There is no letter before the S/N Then gives a list of 6 different Patents Then lists the various Klipsch Models Then "Inspected by" looks like the signature of a D Johnson then "Tested" looks like the signature of N U (or NW) Bradford

Thanks for the responses. As stated in the original message I am a newbie at this and so may ask incomplete - or just plain dumb - questions. My KBs are in a somewhat "challenging" space. It is a 75 foot by 75 foot wide open room - with cars stored in it during the winter. See: www.HistoricMotorSports.net. When I first installed the KBs in two corners, I will admit that I was a little disappointed that they didn't do abetter job of "filling the room." But maybe that was asking a bit much. My solution was to hang a pair of my old (1970s vintage) Bose 901s in the opposite two corners. to compensate for the difference in efficiency, I have a 125 Watt Harman Kardon Receiver driving the Horns, and a 250 Watt Yamaha M-80 Amp driving the 901s. That really ends up being a pretty good arrangement because, as you might expect, the Horns are a good deal "brighter" than the 901s so, depending upon what you are actually listening to, you either drift toward the Horn end of the room for pieces that benefit from the brightness - or the the Bose end of the room when you prefer a somewhat mellower sound. All this brings me back to the original question. I get noticeably more base from the Bose than from the Horns - and indeed, to my ears the Horns are weaker than hey should be. Using the Phantom of the Opera as a test piece, I do fin the Horns to be disappointing. I was hoping that the age of this particular pair (can anyone tell me the age from the S/Ns) might throw up a red flag regarding the the surrounds on the Horn woofers. I haven't actually remover the woofers yet because we have just this week gotten enough cars out of winter storage so I can access the Horns. Anyway, that's where I am at the moment and any suggestions would be appreciated. Bob M

I have a pair of unmolested (I think) KB WO speakers -with AA Crossovers. S/N 125255/125256 What is the consensus opinion on whether to upgrade the Woofers - or not, and whether to upgrade the AA Crossovers - or not.