There is no proof until Heinz disclose his analog setup: turntable, tonearm, pickup, RIAA preamp (separated or integrated)
But the statement '..you lose bass frequencies and lower end instruments.. ' in an analog reproduction system is definitely odd.
Actually, one of the advantages that a (good quality and properly setup) turntable has vs CD is the better reproduction pf the bass frequencies.
Heinz, if this is what you hear probably your analog system has some setup problem, or is on a different (lower) class vs your CD system.