SpeakerTalk

cunningtim · Introductory Contributor Joined: 23 Apr 2022 Posts: 1

I have a pair of KEF 103/4 SP3131 speakers that I bought used and which have unfortunately never worked. Sound output is very distorted. I have disassembled the speakers (and had the woofers refoamed) and tested all of the drivers using test tones. They all seem to be working properly except for one of the midbass Uni-Q drivers, which emits a raspy, warbling tone. I have not been able to find anyone locally (southeastern Pennsylvania) who wants to work on them, and anyway would like to do much of the work myself, both out of interest and to save money.

The mid-bass driver is a B160 SP1278. I found a reasonably priced new B160 SP1320. Does anyone know what the difference between these is, and if this would be an appropriate replacement? If not, can anyone recommend a technician I could send my driver to for repair?

I assume that, since the other drivers work, my primary problem is the crossovers. I don’t know how to test them, nor do I have a schematic diagram. I’m decent at soldering and am comfortable replacing capacitors, etc. if I knew where to start. I have seen that Falcon Acoustics have recap kits but currently nothing is listed for the 103/4.

Open to any and all suggestions—thanks for adding me to this forum, and for your time.

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