dbomberger Posted March 23, 2014 Share Posted March 23, 2014 After receiving clearance from the power that is, I purchased the Cornwalls I had auditioned. The seller mentioned having some paperwork somewhere and I made getting such, part of the deal. In the large envelope was confirmation of the consecutive serial numbers, which are already on the tags and stamped into the cabinet, but instructions on installing the upgrade that the seller believed had been done-upgrading these to B-2 status. Well that left me wondering but wasn't "proof" and being a "trust but verify" guy in business matters these days, I finally opened them up this morning and took a series of photos, some of which are attached. The crossover say's "B" but then has scratched into it "- 2". This is unlike photos of other labels I find on the net, but otherwise look like the same unit. My question for those with far greater experience than I have is just to confirm that these are in fact Klipsch B-2 crossovers. The important thing of course is that they sound as great as I'd hoped. Thanks in advance. 1 Quote Link to comment Share on other sites More sharing options...
tblake10 Posted March 23, 2014 Share Posted March 23, 2014 Congrats. May we see the whole speaker? 1 Quote Link to comment Share on other sites More sharing options...
dbomberger Posted March 23, 2014 Author Share Posted March 23, 2014 But of course. They are pristine on the exterior. I haven't found a single scratch, dent, etc. Grilles are perfect. 1 Quote Link to comment Share on other sites More sharing options...
Schu Posted March 23, 2014 Share Posted March 23, 2014 Something doesn't look quite right... 1 Quote Link to comment Share on other sites More sharing options...
dbomberger Posted March 23, 2014 Author Share Posted March 23, 2014 Thanks. Care to expand on that thought? 1 Quote Link to comment Share on other sites More sharing options...
Schu Posted March 23, 2014 Share Posted March 23, 2014 (edited) I mean it looks like a b2... but I am not sure I have ever seen one scratched out like that on the tag, and seeing b2 on the label doesn't seem right Edited March 23, 2014 by Schu 1 Quote Link to comment Share on other sites More sharing options...
Fjd Posted March 23, 2014 Share Posted March 23, 2014 Something doesn't look quite right... I thought you were referring to the K-51-V mid driver. I had a pair a while back, but long gone. I can't find the page (will probably need to try Google instead of the forum search), but here is the excerpt that I have for the B2 and the K-51-V. June 5th, 1981: The updated B2 network, with steeper crossover slopes is phased in with no changes to the K-33-E, K-55-V and K-77-M driver compliment. October 19th, 1981 - March 1983: The transition between four different iterations of the midrange driver from revolving sources occurs during this period. The original K-55-V was changed to a K-51-V (10/19/81) This marked the first time in the Cornwall's history that it used a driver set that differed from that of the Klipschorn®. The K-51-V was then changed to the K-55-G (essentially a ceramic magnet version of the Atlas Alnico K-55-V). The K-55-G was then changed to the Hepner built K-52-H and finally the Klipsch built K-52-K. 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 23, 2014 Share Posted March 23, 2014 I wouldn't worry about it. As old as those caps are, they're due to be replaced anyways. Freshen them up and enjoy them. 1 Quote Link to comment Share on other sites More sharing options...
Budman Posted March 23, 2014 Share Posted March 23, 2014 (edited) congrats on your speakers. the serial number is stamped in the wood on the rear of the speaker ( top center ) looks like the letter R on the label which is 1977 you can confirm that with the numbers on the label that someone highlighted. the type should be something like C-WO seems to me the midrange driver should be a K-55V from the factory Edited March 23, 2014 by Budman 1 Quote Link to comment Share on other sites More sharing options...
dbomberger Posted March 23, 2014 Author Share Posted March 23, 2014 Thanks for all the replies. This is all very interesting. Yes the stamped number and label agree, making these 1977 apparently. Since the crossover was updated, maybe the midrange might have been as well. Like I imagined, this is just the beginning of of they adventure it seems. As suggested, I imagine I'll want to refresh or replace the crossovers in any event. Quote Link to comment Share on other sites More sharing options...
Fjd Posted March 23, 2014 Share Posted March 23, 2014 (edited) congrats on your speakers. the serial number is stamped in the wood on the rear of the speaker ( top center ) looks like the letter R on the label which is 1977 you can confirm that with the numbers on the label that someone highlighted. the type should be something like C-WO seems to me the midrange driver should be a K-55V from the factory I was wondering about the serial number. I did notice that there is a "R" stamped on the mid driver; therefore, I'm wondering if someone had a repair that involved replacing the driver and the crossover may have been updated too and 'engraved' with the '2'? Edited March 23, 2014 by Fjd 1 Quote Link to comment Share on other sites More sharing options...
Budman Posted March 23, 2014 Share Posted March 23, 2014 (edited) i would sit back and just enjoy your new speakers. i've had stock B's to bob crites rebuilt to bob's new and my last set of networks for my 79 corns of Deans ALK's Edited March 23, 2014 by Budman 1 Quote Link to comment Share on other sites More sharing options...
Schu Posted March 23, 2014 Share Posted March 23, 2014 Indeed... sitback and enjoy. Later, if motivated, upgrade those XO's for even further refinement 1 Quote Link to comment Share on other sites More sharing options...
dbomberger Posted March 23, 2014 Author Share Posted March 23, 2014 Thanks again for all the feedback. One thought that comes to mind as I look into the packet that came with the speakers. There are two pieces of paper related to the upgrade (update). One is titled "Update Kit for Klipsch Cornwall Crossover Network) (Type B to Type B-2). It lists all of the components provided, the tools required, and six different instructions. The second page is a set of before and after schematics. This would explain why the scratched in "2" would be there as it is decidedly less elegant than anything I would associate with fine workmanship. Still as others have suggested and I am experiencing-they sound great for now. 1 Quote Link to comment Share on other sites More sharing options...
djk Posted March 24, 2014 Share Posted March 24, 2014 (edited) The K51V (Atlas) had the two port phase plug with a ceramic magnet. The magnet had a bit of a problem slipping, probably why yours has an 'R' driver. Klipsch reject a bunch of a varient of these drivers (had a metal cover on the back, similar to the K55M), which Atlas sold as the MDMR. Edited March 24, 2014 by djk 1 Quote Link to comment Share on other sites More sharing options...
Heritage_Head Posted March 24, 2014 Share Posted March 24, 2014 Those speakers look really nice congrats Quote Link to comment Share on other sites More sharing options...
tblake10 Posted March 24, 2014 Share Posted March 24, 2014 But of course. They are pristine on the exterior. I haven't found a single scratch, dent, etc. Grilles are perfect. Thanks. Verify nice. Quote Link to comment Share on other sites More sharing options...
tblake10 Posted March 24, 2014 Share Posted March 24, 2014 But of course. They are pristine on the exterior. I haven't found a single scratch, dent, etc. Grilles are perfect. Thanks. Verify nice. Very Quote Link to comment Share on other sites More sharing options...
Max2 Posted March 24, 2014 Share Posted March 24, 2014 Those things don't appear to have been used enough to even draw any dust up in them. The tops of those caps are shining like they just got boxed up in hope. You scored big time! Quote Link to comment Share on other sites More sharing options...
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