Is there better amp for bass then Cary Rocket 88

The Rocket 88 is a good little amp, but for speakers of average to slightly above average sensitivity, you might find an amp like a Plinius 8200 with stronger bass presence.

If, on the other hand, you want to stick with tubes, then I could suggest Cary V12 or SLM-100's, or another brand such as Audio Research VT100.

My experience, too, is that not only is the speaker-amp mating important for a good, realistic bass response but so is the preamp-amp mating. The preamp can contribute a surprising amount of the perceived bass, and I feel this is often ignored.

Michael

You might think about getting a subwoofer so you can control the low frequency volume independently of your left/right speakers. Works for me.

Have you considered a Class "D" amp?

+1 to add a sub (or two). I did perceive somewhat more bass when I swapped tubes in my amp (not Cary), but would agree that, in general, if you want more bass, and if you already have a decent modern amp, change speakers or add a sub. Your bass and mids are likely to improve.