I bought a pair of standmount loudspeakers B&W 601 in great condition. Unfortunately after a while I’ve start smelling something fishy at one of the speakers. After listening I’ve located, that super tweeter wasn’t working. Easy repair, what could be wrong? Cold joint, cable, crossover or tweeter? One of those.
Speaker can handle up to 100W and playing quite loud if fed by strong amp. I has possibility of bi-wiring, but I think its bullshit connect it that way.
Let’s get back to our task. Repair of sick speaker. First crossover and tweeter needs to be taken out, so problem is located. It was obvious, that problem is in tweeter.
Crossover was briefly examined. Cheap as a chip, thumbs down from me Bowers & Wilkins! (At least it’s not capacitor in series with tweeter :/)
Drivers actually look pretty nice, big magnet to increase sensitivity of speaker. Nominal impedance 8 Ohm, but by my guess would me closer to 4 Ohm. Don’t really know what you expect in this price category.
Tweeter is big chunk of magnet and aluminium. Nice.
And the same from the other side.
This is how it looks taken apart. Spherical diaphragm made of golden plated metal (Aluminium?). Coil made of very thin coper wire. In old days they said copper, later OFC copper and OFC 7O cryo treated bullyapp in nowadays – the same stuff, with more marketing bollocks on the top.
You can clearly see broken wire. Not easy task for someone who never hold soldering tip in hand. Wire is about hair thick.
Tweezers in hand, little bit of flux on both, tin and than connect it togeter. Working again, and with little bit of luck last forever.
Closer look showing, that coil needed to be unwired a bit. Aluminium dome is very thin and fragile. No wonder, that you can see dozens and dozens auctions with damaged tweeters from curious fingers 🙂