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Power amplifier section circuit in the amp fault. Check and replace damaged component/s at this section circuit. Contact any service technician. This is a skilled work. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Hi Katrina, Yes parts are available for your R909 speakers. firstly I am surprised that you have managed to blow both tweeters and crossovers.....there must of been some serious distortion/amplifier clipping involved there??? So a couple of things. Can you actually see damage to the crossover boards? If so what components have been damaged? i.e board loactions and parts. The crossover is available but they are not cheap. $1560 each (AUS) So it would be preferable and much cheaper to repair them at board level. Tweeters are also available.. $745.00 each (AUS)
Most likely it is a rubbing voice coil in either the midrange driver or the tweeter. The only way to repair is to replace the bad driver or tweeter with a new part. Contact CV for replacement parts costs. Replacing parts in most speakers is usually easy to do if you have rudimentary tools and skills. Most connections are made with "faston" slip on/off connectors so a soldering iron is usually not needed.
if the original KEF tweeter is no longer available there are other brand tweeters that should fit as a replacement option. just contact a repair center (us) and you can get options.
the best solution I've found is this: 1. Remove all the tweeter screws. 2. Take a thing metal rod (a coat hanger should work) and lightly tap the tweeter through the top port in the rear until it is loosened and comes out. The tweeter is totally sealed so you probably won't damage it if you need to do this to a working tweeter.
This method also works for the woofer but you need to be very careful to tap the frame or magnet of the woofer and not the cone.
hi, have u first disconnected the tweeters and then checked, as if its on a cross over, the tweeter is in series with a capacitor,if u have a ohms meter or a continuety tester check the tweeter coil if its open,secondly you can have the coil replaced, check if u can get one before buying a new,let me know