Peavey humbucker model - Manual (Page 11)

Strings
Old strings produce dull, buzzing or dead notes, while a new set
of strings ring clear and true. If you play often, you will need to
change your strings often. A good rule of thumb is that if you play
daily, you should change strings every two or three weeks. Replace
your strings as you notice them becoming dirty or discolored, be-
fore you experience a disappointing loss of performance.
See page 12 for detailed instructions on changing strings.
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