No, they have a very short and narrow range.
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many thanks to all who have answered.
their range is the standard 20 HZ - 20 KHZ we can hear (but maybe it prforms less well above few KHZ)
if you manage to make alterating magnetic field that the head can catch then why not ?
> their range is the standard 20 HZ - 20 KHZ. It's considerably higher than that. "generally from 40 to 150 kHz" - http://en.wikipedia.org/wiki/Tape_bias. Another bit of worthless trivia from your Ol' Uncle Nacho. heehee
great then !