How old is the turntable (record player)? Did it sound OK thru the same amp(s) before you got the new stylus? Newer (made in the last 7-10 yrs) stereo amps/recievers lack a dedicated 'phono' input with a dedicated preamp for the turntable (record player) device like older ones. Many newer turntables have built-in preamps; they didn't used to, when amps had phono inputs. Without a phono preamp, the signal strength won't be adequate. If that's waht seems to be lacking, you can get a separate phono preamp and plug it inline.
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