Reply to thread

I find my C12q is brighter, louder and has a tighter low end (at the same amp setting) than both the P12q ribbed and the P12r smooth versions.  It is difficult to be objective when these speakers have been changed over long periods of time.  I do know the amp sweet spot changes for each version and  I was quite surprised at the volume difference between a 6.7 ohm and 7.8 ohm speaker (the P12r and P12q respectively).   I had not thought about the dryness of the cone material.   I've read that its difficult to duplicate the original cone material so most vintage re-cones are supposedly not a perfect representation of a P12r with an original old cone that has dried out.   I used to think that some of the guitar forums that discussed these old Jensen's were a bit over the top on their opinions but now that I've experienced it, I'm convinced there is some weight to their arguments.  As for breakup, yes that appears to contribute to the complexity of these comparisons.   Its a bit of apples to oranges.  Most of my experience is with circuit design, debug/repair and testing so this is unfamiliar territory for me.   I know this has been discussed to death on some of the guitar forums but I have more faith in the analysis by the  members here at Groupdiy!