I had a SL top of line pre with phono (probably your phono module) and do not remember the sound being bass shy.
I can only suggest that you are either loosing energy somewhere or that the pre hasn't been on long enough. Since the latter is unlikely (as is a wiring mistake, I think:)),
1) check the loading - i.e. have you loaded yr cartridge correctly and /or,
2) check the input impedance of yr amp - I notice you have a SL integrated, but still...
No bass is a classic symptom of impedance mismatch.
I can only suggest that you are either loosing energy somewhere or that the pre hasn't been on long enough. Since the latter is unlikely (as is a wiring mistake, I think:)),
1) check the loading - i.e. have you loaded yr cartridge correctly and /or,
2) check the input impedance of yr amp - I notice you have a SL integrated, but still...
No bass is a classic symptom of impedance mismatch.