help identifying bass solutions with system

Sorry, i am new to the terminology. I will try my best to elaborate my issue:

I can hear the highs and mid range very clearly. the bass seems like it has been turned down. perhaps this is the 'thin bass' as stated above.

my problem is certainly a lack of bass, not an abundance.

thanks again

There are at least a dozen reasons for bass-shyness. Very hard to say from just listing your equipment. What is the rated frequency response of your speakers? Are they expected to do deep bass very well? Or are we just talking about mid-bass issues, which could be due to anything from the cartridge through to the speakers. Easiest thing to try is to lower the rear of your tonearm a tad, so as to decrease VTA. If the pivot is higher than the headshell end, many cartridges sound "Llght" in the bass. Does your phono stage have a rumble filter? If so, and if it is engaged, dis-engage it. If your speakers are away from the walls and corners of your room, move them closer. If they are monitors on stands, then try lowering them closer to the floor. Etc. The room itself is often a culprit.

Why do you suspect the phono pre? There are so many dimensions to a table and cart set-up that it would probably be worth stepping back and going through everything from the protractor, vta, anti-skate, loading, gain, etc.