jason.justice Posted May 20, 2022 Share Posted May 20, 2022 (edited) Seller purchased them in 1979. No other SN available. Are these Cornwall 1s? Try to get the specs. Thanks. Edited May 20, 2022 by jason.justice 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted May 20, 2022 Share Posted May 20, 2022 Yes FREQUENCY RESPONSE (+/- 4 dB) 34Hz - 20kHz. SENSITIVITY1. 102dB @ 2.83V / 1m. POWER HANDLING (CONT/PEAK) 100W/400W. MAXIMUM SPL. 119dB Continuous. NOMINAL IMPEDANCE. 8 ohms Compatible. CROSSOVER FREQUENCY. HF: 5000Hz. HIGH FREQUENCY DRIVER. K-107-TI 1” (2.54cm) Titanium diaphragm. MIDRANGE. K-702 1.75” (4.45cm) Polyimide. More items... Quote Link to comment Share on other sites More sharing options...
billybob Posted May 20, 2022 Share Posted May 20, 2022 Maybe he kept some of the paperwork. Quote Link to comment Share on other sites More sharing options...
jason.justice Posted May 20, 2022 Author Share Posted May 20, 2022 That PDF is for Heritage CW IVs. I was fooled as well. I believe this is the correct spec sheet. Is there going to be much difference between CW I and II both produced in 1979? 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted May 20, 2022 Share Posted May 20, 2022 Well, sorry about that. Bailing on you but, compare the difference on pdf. Others will chime in. Thanks! 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 20, 2022 Share Posted May 20, 2022 given they do not have risers most likely k77 round magnet (otherwise Ferrite ),k-600- k55V midrange , K33 square magnet , B network , Frequency Response: SENSITIVITY: 98.5dB @ 1watt/1meter POWER HANDLING: 105 watts maximum continuous (1000 watts peak) NOMINAL IMPEDANCE: 8 ohms TWEETER: K-77-1" (2.54cm) Phenolic diaphragm compression driver HIGH FREQUENCY HORN: 90(o)x40(o) Exponential Horn MIDRANGE: K-55-V 2" (5.08cm) Phenolic diaphragm compression driver MID FREQUENCY HORN: 90(o)x40(o) Exponential Horn WOOFER: K-33 15" (38.1cm) Fiber-composite cone ENCLOSURE MATERIAL: Birch Plywood or Veneered Lumbercore ENCLOSURE TYPE: Bass reflex via front-mounted port WEIGHT: 108 lbs. Quote Link to comment Share on other sites More sharing options...
billybob Posted May 20, 2022 Share Posted May 20, 2022 Here Jason, on the 1st page from a legendary member: Quote Link to comment Share on other sites More sharing options...
Budman Posted May 20, 2022 Share Posted May 20, 2022 serial numbers are stamped in to the wood on the back top section Quote Link to comment Share on other sites More sharing options...
jason.justice Posted May 20, 2022 Author Share Posted May 20, 2022 Love this forum. Thank you!!!! Quote Link to comment Share on other sites More sharing options...
jason.justice Posted May 20, 2022 Author Share Posted May 20, 2022 Thanks. Assuming these are all original parts from 1979 and Type B network. What are the recommended upgrades to make for these 1979 Cornwall 1? Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 21, 2022 Share Posted May 21, 2022 Klipsch capacitors from @JEM Performance , for the crossovers .....that's it ....and if it's not broken , dont touch it , but it's doubtful with 79 Cornwalls JEM Performance Audio (412) 401-6915 theaudioroom@verizon.net Quote Link to comment Share on other sites More sharing options...
PrestonTom Posted May 21, 2022 Share Posted May 21, 2022 1 hour ago, 001 said: Klipsch capacitors from @JEM Performance , for the crossovers .....that's it ....and if it's not broken , dont touch it , but it's doubtful with 79 Cornwalls JEM Performance Audio (412) 401-6915 theaudioroom@verizon.net Certainly, JEM is one vendor, but there are others also. Search the threads. Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 21, 2022 Share Posted May 21, 2022 1 hour ago, PrestonTom said: Certainly, JEM is one vendor, but there are others also. Search the threads. I did search , 1 Dealer supplies klipsch capacitors in the USA for klipsch Heritage crossovers , that's JEM . Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted May 21, 2022 Share Posted May 21, 2022 1 hour ago, PrestonTom said: Certainly, JEM is one vendor, but there are others also. Search the threads. Yes, there certainly are. Parts Express, Sonicraft, and many others. 2 Quote Link to comment Share on other sites More sharing options...
PrestonTom Posted May 21, 2022 Share Posted May 21, 2022 6 hours ago, jimjimbo said: Yes, there certainly are. Parts Express, Sonicraft, and many others. I believe this is the Type B schematic for your Cornwalls. Leave the inductor and autoformer alone, but the 4uf and 2 uf caps are your target. Check the Parts Express website to see what they have. When I have done this in the past I simply used the Solen Polyprop caps. IIRC, sometimes it is hard to find a 2uf substitute, so feel free to use the more commonly found 2.2uf cap. If you want to get fancy then a spend a few dollars more and bypass (wire in parallel) a second cap across the main cap. This bypass cap should be about 1 or 2% the value of the main cap (approximately or even a little less). I like to use a Dayton film / foil as the bypass cap also available at the same website. There are also other brands to choose from and there are also ways ways to spend even more money (the sky is the limit). When you refresh the caps, you will notice a bit more energy in the high frequencies. Some folks will offer very flowery language about the "new found" sound. Given the price, it is certainly worth doing. Good luck, -Tom Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted May 21, 2022 Share Posted May 21, 2022 14 hours ago, jason.justice said: Thanks. Assuming these are all original parts from 1979 and Type B network. What are the recommended upgrades to make for these 1979 Cornwall 1? Do you have the tools and knowledge to solder? These are very simple circuits. Quote Link to comment Share on other sites More sharing options...
Budman Posted May 21, 2022 Share Posted May 21, 2022 hey Google, who makes caps that say TI on them. asking for a friend Quote Link to comment Share on other sites More sharing options...
OO1 Posted June 9, 2022 Share Posted June 9, 2022 OEM Klipsch , same as Ford -GM-JBL- DODGE -NISSAN-TOYOTA-KIA-HYUNDAI- MERCEDES BENZ -FIAT-CHRYSLER- LOTUS-INFINITY-LEXUS and many more Quote Link to comment Share on other sites More sharing options...
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