Lloyd Borrett Posted January 6, 2013 Posted January 6, 2013 G'day, Back in 1976 I build a pair of Phillips Magnavox MV-50 speakers from a kit -- 50W RMS, 3-way system with 10" woofer, 6" mid range and two dome tweeters. Well the two tweeters were damaged by too many kids fingers over the years and I later switched in a single new Vifa tweeter into each enclosure. Well after being in storage for a few years I went to put these speakers to use again for my stereo hi-fi system, but sadly found one of the speakers not working. I suspect the crossover has died. So what do I do? The enclosures are still solid and usable. The drivers all look in reasonable condition. I could just try and find a pair of new crossovers to put into the enclosures, but my chances of getting that right are limited. Or I could just replace all of the drivers and the crossovers with a modern setup. Or I could just quit them. What would you do? Best regards, Lloyd Borrett.
Sub Sonic Posted January 6, 2013 Posted January 6, 2013 G'day Lloyd, It would be worth a quick look to see if any wires have fallen off inside, as the speaker should not just completely stop working. The woofer at least should work unless there are some major issues. Taking the woofer out would be the most obvious way of accessing the inside of the enclosure. If the connections are crimped they would be worth a look too, check for loose terminals or any corrosion. Regards, SB
In Finite Posted January 7, 2013 Posted January 7, 2013 i agree, the crossover wouldn't just completely stop by itself, unless a connection has been broken or a solder joint at the first part (input) of the xover has gone open, just do some quick continuity/resistance tests on the crossover with the woofer removed and use the working speaker as a comparison with the results. As for replacing all the drivers and Xovers, seems like a big expense, all you are keeping is the cabinets. A refoam of the bass drivers and some new modern Xovers might be just the ticket. Or at least a recap of the original X overs.
LogicprObe Posted January 7, 2013 Posted January 7, 2013 Yeah, disconnect the speakers and put a 1.5V battery across the terminals and see if the cone moves.
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