Mike - > > Actually, the two most important characteristics of a > speaker (in terms of quantifiable measurements, at > least) are dB/1 watt (sensitivity) and frequency > spectrum. Nice tutorial. The non-quantifiable quality is "SOUND". Obviously, all speakers don't sound the same, even if they have the same specs (Consumer Reports notwithstanding). Listen to the speakers and try the better brands. BTW, I think the/my orig. '66 mono speaker has a decent sound. Bob