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You mention the Garrett headphones -- specifically the ClearSound model mating well with the MDT in terms of good audio. Those are on-ear type and a lot of detectorists prefer over-ear. Have you tried their MS-2 model, which is only $10 more? I wonder if they use the same speakers or if Garrett just buys various 3rd party headphones and puts their logo on them, in which case probably not.
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