I have a turntable connected to my Bose 535 lifestyle home system. It has a built in preamp. Its connected to the system via RCA cable that came with the turntable. Its a Danish product, but was not expensive so it ahoud be ok. However I do find the sound lacking the fullness and the Bose bass that the other equipent connected to it produce. (CD, DVD and Bluetoth) Is there something lacking with the setur, or is the Bose system not made for producing better quality for analog equipment?