Almarg is probably right. It's your pre/amp combo mismatch causing this. If you, demo a good integrated to see how much it helps. I can tell you the NAD C390 has fantastic bass and a built in DAC.
how do i get more bass w/o adding a sub
My system consist of Art audio VPI tube pre, Primare a30 amp, ps audio dac, ps audio p5 power conddtioner, Jmlab cobalt 806 and just move to Usher x718. Cable is KImber silver streak . I just dont get much bass. IS there some thing i can do? This system is for my work desk room size 15x15