Thiel Owners

Hey y’all, I just picked up a pair of CS1.2’s in Berlin, Germany today! The tweeter on one of the speakers doesn’t seem to be working at all - has anyone experienced this issue before? I suppose this may be more of a general speaker question, but I thought I’d try here nonetheless. I’m assuming that either a contact on the wiring has come undone, or maybe one of the components is fried (although I had a look inside and didn’t see anything "out of the ordinary", but then again I’m no expert!). I think the tweeter itself is still fine, as the other tweeter and both woofers are still in decent condition, could be wrong though. Also, when my other speakers are hooked up (with the same cables to the same channels), there aren't any issues. Any tips would be greatly appreciated!

P.S.: I just remembered that when I applied a high-pass filter, there was still a fairly large amount of higher frequencies coming through the woofer. Does anyone know the specs on the woofer (i.e. frequency range)? This just made me think it could possibly be a crossover issue.

Hey again, thanks for your responses to my post on Sunday! I also wrote Rob Gillum from Coherent Source Service, and he suggested I may have an "open circuit" on the voice coil - so I removed the fabric layer between magnet and dome structure and realized that the voice coil is broken at one point. Is there any kind of how-to guide you could recommend on replacing a voice coil? And can I use any old (or preferably new) 1" / 25.5mm voice coil? Thanks again for your help!

Alright, that's probably the best idea. I would probably just make it worse if I tried to do anything with it =D Thanks again for your input!

Looks like the correct tweeter is a SEAS 25TAF/G H400 (at least that's what it says on mine). I just had a look on Ebay and found some which seem to be the same ones or would match up with mine - like this one here - (although this offer looks slightly different from mine on the underside). Do y'all reckon that would be a safe bet?

Hey all, hope you're well as can be expected! I posted in September 2019 about a pair of CS 1.2's I received, with one of the tweeters not working at all. Well it took me this long to get around to doing something about it, but I finally received a (new) replacement diaphragm / voice coil from SEAS, but I still can't get it to work. I already switched the tweeters back and forth when I first got them and the functioning one works on both speakers, so I think it's safe to assume the issue must be something with that defective tweeter, correct? I've just measured the impedance on both tweeters (removed from the circuit, with the magnets detached. The functioning one reads between 4 and 5 ohm, and the new one doesn't register anything. When using the multimeter's current detection function (or whatever it's called; the one which emits a beep-tone when a circuit is closed), I don't get any signal on the new diaphragm, whereas I do when I measure on the positive and negative terminals of the old (functioning) one. Does this probably mean the new diaphragm (which I spent months waiting for) is defective? I can't detect any breaks in the wires leading to the voice coil, but also don't get any signal-beeps when I hold the multimeter to these wires. What do y'all think?

Hey Jafant, good to "be back"! ;-)

Aside from the Thiel speakers which I hope will one day be restored to their full glory, I have an old Kenwood amp from my father, which must be about as old as the Thiels. At some point I'd like to get more into DIY electronics and try my luck at making my own amplifier using some valve tubes, but I think I've still got a long way to go until then! During the lockdown I've actually gotten into building my own (mobile) 12v sound system - geared more towards bass-heavy music i.e. dub, roots, jungle - which has been quite a nice experience and learning curve. I began with a 12v AGM battery and 1200w Pioneer amp, and then built a "Cubo 15" and some custom enclosures for 2x 8" mids and 2x 1" tweeters in a mono stack. I've since crafted some separate (and nicer looking) horns for the tweeters and some "mini-scoops" for the mids - now stereo - for home and studio use, until I can take the system for a ride in warmer weather.