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mtprell
mtprell's picture
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Last seen: 2 years 3 months ago
Joined: Aug 19 2020 - 6:37am
Diagnosing Allison One problems

I recently inherited a pair of Allison One speakers from the late 70s or early 80s. They belonged to my stepfather, and I remember their room-filing sound, although I don't think they've been used in years.

I attached them to my system, and they output mostly trebly sound, with just a hint of mid or bass. The connections have the correct polarity, and the receiver (Harmon/Kardon 3390) is capable of driving the aging pair of KLH speakers previously attached. I removed the grilles, and the speaker cones appear to be intact and operational. The speakers can handle power, and the sound is not distorted, just trebly. My guess is that some of the internal crossover electronics may be the cause, but I don't know how to diagnose or what the fix would be.

Any suggestions or advice would be most welcome.

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