The next project is the upgrade of a pair of Kef 104/2 series 1
What will be done to this pair is servicing the crossovers and upgrading tweeters
The caps used will be Solen and Bennic Caps
The tweeters chosen are ScanSpeak Revelator R2904
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The typical complain about these speakers is the lack of top end, its a bit muffled, lacks sparkle.
The common problems are leaking caps due to age
This model also incorporates a protection circuit in the crossover.
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Alcaps and Elcap as used in Kef, Gales, Rogers etc are very prone to leak over time. The Elcaps are notorious
to give exagerated values, one recently replaced was a 60uF which read 111uF
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Another problem with these crossovers is the capacitors in the protection circuit, they leak badly and corrode
the board and tracks.
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