I want more bass…

Could be your room as much or more so than your amp.

Your pass is more than adequate.  Either:

1.  your problem isn't in your amp, perhaps power supply, perhaps in the signal path.

2.  You don't really have a problem.  your system is making a accurate reproduction of the recording.  You can still add more bass, but you will have to use an equalizer.

Jerry

I’d love to hear those speakers, where do you live, I’m in Plainfield, NJ.

this cd has ’my Funny Valentine’, just Mila and a bass player

. You will hear how well your system delivers not only bass, but quality, refined bass, not booming bass. If your friends want booming bass, let them listen to someone else’s crap quality bass.

perhaps you can stream a high rez version. If you like her voice and those songs, buy the CD, it is terrific.

.................................... search, here, for ’strong bass’. https://forum.audiogon.com/search/index?utf8=%E2%9C%93&query=strong+bass+recordings

The first place I would start is repositioning your speakers. Even before you do that you can try reversing the phase at the speakers by switching +/- cable connections. If the bass is "better" then it's not the speakers themselves but rather their location in your room relative to where you listen. It's an easy test.

I vote for the room. Either you are sitting in an area with a suck out or your expectations are not realistic. I would start with taking some measurements to see exactly what you are getting.