ajsons Posted January 23, 2006 Share Posted January 23, 2006 The first Classic thread is now 6 pages long, so I'm starting Part Two and it will be mostly about drivers specs, construction details, and improvements. I will post cad drawings of added parts (reflectors, braces, etc) or modified pieces later on. Inputs (photos, comments, etc.) are definitely encouraged. The specs for the C15W woofer are hard to find, but now it is on this forum. I found this from an old issue of Speaker Builder. The bolt pattern for this woofer matches most of todays 15" woofers, so substitution is not a problem. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 Its a dual impedance woofer, it shows up on ebay every now and then, so paying $200 for one (and it had happened on more than one occassion) in excellent condition is insane. I waited and bidded when nobody was paying attention, got three for about $60 each. They are all in excellent condition. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 The black version. I think University started making this when they moved to a different plant.Here's a description from a 1961 ALLIED RADIO CATALOG: MODEL C-15W 15" WOOFER. TOP-PERFORMING WOOFER FEATURING SPECIAL-DESIGN DUAL VOICE COIL--TWO ELECTRICALLY INDEPENDENT VOICE COILS ON A SINGLE WOOFER. DUAL-SPIDER PISTON AND 6-LB. MAGNET ASSURE CLEAN RESPONSE FROM BELOW 25 TO 1500 CPS. CAPACITY, 50 WATTS. DUAL IMPEDANCE VOICE COIL ASSEMBLY PERMITS USE IN ANY SYSTEM OF 4-20 OHMS. DEPTH 10 1/2". The depth applies to the gold and green version above. The black one appears shorter. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 The Cobreflex is really a hi-fi speaker, not PA, but found its way in that arena, perhaps because of its utilitarian look. It sounded very good to me with the EV 1824M midrange and a little harsh with the T-30 driver it came with. Here's mine, one disassembled, ready for final sandblasting. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 Specs for the Cobreflex. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 Cobreflex specs, page 2 Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 Page 3 Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 23, 2006 Author Share Posted January 23, 2006 The University T-30 mid driver Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 The University T-30 mid driver ajsons - Thanks for starting the new thread. That appears to be a T-30 driver on an H600 mid horn. If there's an adjustable, black plastic phase plug in the mouth, then it's an H600. They also made a similar horn, the 4409, which I've never seen. I'm not sure if I have a picture on file. If not, I can shoot one. Chris Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 The Cobreflex is really a hi-fi speaker, not PA, but found its way in that arena, perhaps because of its utilitarian look. It sounded very good to me with the EV 1824M midrange and a little harsh with the T-30 driver it came with. Here's mine, one disassembled, ready for final sandblasting. Here's a .pdf of the CobreflexIII, which is still made by Electrovoice, although I believe it may now be made of fiberglas instead of cast aluminum. It appears they now promote the Cobreflex for PA use. Chris Cobreflex Spec Sheet - Electrovoice.pdf Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 24, 2006 Author Share Posted January 24, 2006 TNX for the post. Yes that's an H600, beautiful horn. I plan on using that for a center channel speaker. And you're right, the cobreflex III is fiberglass, with a bigger throat. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 24, 2006 Author Share Posted January 24, 2006 Chris, I can't find the specs on the T-30. Do you have one? Here's another picture of cobreflexes. Personally, I think they look good and rightfully belong in the Classic. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 24, 2006 Author Share Posted January 24, 2006 Sorry, double post and the .bmp picture wouldn't load. Quote Link to comment Share on other sites More sharing options...
ajsons Posted January 24, 2006 Author Share Posted January 24, 2006 Chris, I can't find the specs on the T-30. Do you have them? Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 Chris, I can't find the specs on the T-30. Do you have them? ajsons - Here's some specs on University horns from hifilit.com: The T-30 specifications are right underneath the Cobreflex. Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 Here's another page from hifilit.com showing the Classic, Dean and C15W. These are from the 1957 catalog, probably before the H600 was introduced. Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 Here's anothe page from the same catalog, featuring the Classic and Dean: Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 While I'm at it, here's a page of speakers, including the wonderful and rare 315C: Later versions of the 315C had a HF-206 horn without the grill. Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 Almost missed this one with another shot of the T-30, this time compared to the drivers that University marketed for PA applications. Notice that the T-30 and Cobreflex do dual duty for HiFi and PA. I think you're right about the Cobreflex. It's compact, utilitarian styling made it "look" like it was made for PA duty and causing audiophiles to dismiss it. Quote Link to comment Share on other sites More sharing options...
Quisitive Posted January 24, 2006 Share Posted January 24, 2006 Armando - I stumbled across these "corrected" drawings for the Classic on loudspeakerguru's site at this URL: http://www.geocities.com/loudspeakerguru/CorrectedUniversityClassic.gif: You may have already found it yourself, but I thought I would post it for general reference. I'm much more interested in your resulting designs! Quote Link to comment Share on other sites More sharing options...
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