Dynamics varying with track position.


I’m finding that dynamics and timbre improve as the cartridge moves toward the inner 1/2 of the album. Running a DL 103r.  Aligned on my 303 arm with Regan paper protractor.  Also a slight emphasis on the left channel. Tried realigning/ checking overhang and I’ve heard no change.  Also checked the alignment with the Ortofon guide. Any one have a thought on the cause or remedy for this?
thanks. 
Lou
128x128lwal22
Thanks for the insight. I’ll check the alignment with a dB systems available to me. If I don’t get improvement I’ll spring for a mirror alignment tool. 
The azimuth adjustment is tough with the rega arm. Any reason to suspect it’s off?
Alignment checked out with the DB so I  began trying antiskate changes. The issue cleared up entirely.  Oddly the best result comes from nearly 0 antiskate on the Rega.  I suspect the magnet/ slider is seriously miscalibrated. Since it’s sounding balanced now, I’ll leave that alone.
thx  

Anti-skate related distortion (should) start in the right channel.

Increasing the anti-skate will increase the tracking ability. However

Van den Hul warned against ''too much'' anti-skate by trying

to get + 60 microns (pure). Aka: better no skate at all than too

much. I moved to the ''other side'': no anti-skate at all.