does the arm feature a vertical tracking angle adjustment?
If VTA is incorrct (the back of the arm set too low) then the lows may be accentuated sacrificing HF performance. Start with the arm set parallel to the record, then try raising the back of the arm a few degrees at a time & listen again. Also try lowering as well. You want a VTA of about 22 degrees; you can tune this by ear. Some more expensive arms allow adjustment even while playing. The economy models not so, or may not even be adjustable atb all, in which case you might need to shim the cartrige. Lots of forum posts in the analog section in this regard, just run a search on VTA.
As Tfk advises, check the basics first.
If VTA is incorrct (the back of the arm set too low) then the lows may be accentuated sacrificing HF performance. Start with the arm set parallel to the record, then try raising the back of the arm a few degrees at a time & listen again. Also try lowering as well. You want a VTA of about 22 degrees; you can tune this by ear. Some more expensive arms allow adjustment even while playing. The economy models not so, or may not even be adjustable atb all, in which case you might need to shim the cartrige. Lots of forum posts in the analog section in this regard, just run a search on VTA.
As Tfk advises, check the basics first.