Quote:
Originally Posted by GrimJosef
...there was rarely a problem until long after the expected lifetime of the equipment.
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And this is surely the point. The youngest original Quad II is over fifty years old. Peter Walker said that if an amplifier lasted ten years, it had fairly done its job. Most failures are due to the same few weak points, not spread all over the unit at random. This is not a failing - it indicates that the general standard of design and construction is excellent.