gsgleason

Hi. I got a busted up pair of Cornwall 1s (1979) recently. The tweeters were both dead, so I just replaced the diaphragms with new ones from Simply Speakers. When I connected it all up to test, one of the speakers sounded good for about 2 seconds and then there was a sudden drop in the treble. The tweeter and squawker are putting out sound, just very little compared to the other channel. After lots of troubleshooting, I found that the problem follows the crossover. It's a type B. I found it really weird that the treble dropped out so suddenly. What could be the issue? I measured the capacitors with my DMM and they seem to be measuring properly.

Regular bondo for covering with veneer, or the bondo wood filler?

When I looked at them I removed the back and disconnected the tweeters from the crossover and connected them directly to the speaker wire. Nothing. Not a peep. Fortunately the diaphragms are only like $20 each from simply speakers and I've heard mostly positive results. They are extremely rough. These were severely abused. I want to test the performance before deciding if I want to invest in a makeover. I have some photos in another post.

Both tweeters were blown. Seller gave me $150 off after he did a quick google search for k77 tweeters. I didn't argue and took it for $450. Ordered replacement diaphragms from simply speakers and they should be here this weekend.

So basically level the surface and re-veneer over the whole thing?

I prematurely submitted. Photos have been added.

Oiled Walnut veneer. Several edges and corners have damage with missing veneer as well as missing the underlying structure. End goal is to remove the old finish, sand, and do something more neutral that won't yellow, like a water-based satin poly over either an oil rub to bring out the grain/dimension, or seal with shellac then poly, or maybe just poly on the raw wood. My first thought was to clean the wound, cut out the damaged veneer, fill, sand, and replace veneer bits. This seems tedious and difficult. I'd need a thicker veneer than stock so I can sand flush. I have also considered simply cleaning, filling sanding alone, but I'm concerned that the filler will really stand out, especially after being finished. Any advice would be appreciated. Greg.

Oh, and one has a dented woofer dustcap. =(

Even in super rough condition like this?

A guy is selling a 1979 (T SN) pair of cornwall 1s. Oiled Walnut. No grills. He said $600 is the lowest he'd go. What do you think? I have a feeling they'll be gone soon.

Currently using a pair of RF5s with a Yamaha AS701 for my vinyl setup. The speakers were a great deal at $120 for the pair locally, so I nabbed them (even though I have the black variety in the TV room already). It does seem silly have two pairs of RF5s, even though they sound really good to me, so I've been browsing local listings to see what's out there. Well a guy is selling a mint set of KG4s in walnut for $400. They have the original boxes and even the manuals! They look absolutely pristine. So, do you think the KG4 would be a good change for 2 channel music (vinyl and FLAC, no movies)?

So you think the RF5 is a big step up from the KG4? I already had a black pair of Klipsch RF5 for my living room and I like them a lot. When a pair of cherry RF5s were available for $120 locally I jumped on them for a hifi setup in my basement. I also picked up a Yamaha AS701 amp and Technics SL 1700 TT. It does seem silly have two pairs of RF5s (even though they sound really good to me), so I've been browsing local listings to see what else is out there. A local guy is selling a mint set of KG4s in walnut for $400. They have the original boxes and even the manuals! They look absolutely pristine. So, do you think the KG4 would be a good change for 2 channel music (vinyl and FLAC, no movies)?

Thanks everyone. I put them back together and they sound okay to me. It's hard to tell without a reference frame.

I picked up a pair of cherry RF-5 for a great price on FB marketplace, but they were really disgusting. I've removed all he drivers and horns and have been cleaning them up. I disassembled the horn from the tweeter and thought that the horse hair brush on my vacuum would be gentle enough on the diaphragms. I was wrong. I dented them and pushed them back, but now they're crinkled looking. Do I need to replace them or will they be okay?