How do I get a speaker with the bass slam of my el cheapo ear buds...?

mtrot,

"I have heard some speakers that to some extent replicate the sort of bass attack that I am talking about."

Wouldn’t those speakers be a good starting point to the answer you are looking for? Many manufacturers have their "house sound" so maybe a bigger model would be just what you are searching for.

You are the only one who actually knows what sort of bass attack you are talking about. Rest of us are just trying to imagine and may be completely misunderstanding and giving you wrong answers/suggestions.

mtrot,

I added a bit about earphones because you seem to like yours and millercarbon nicely explained what could be causing the difference you notice.

You seem to have decent home equipment but have you considered a possibility that you overall actually prefer the sound coming from phone through the earphones? These days, many people do. Many chase "perfect sound" while they could be enjoying more by accepting the fact that they like "imperfections". At the same time, some people simply prefer the sound through headphones. Chasing speakers to sound like headphones may not be that successful. They are inherently different.

I would say that millercarbon's post summarizes it.

However, there are earbuds and then there are earbuds. You may be surprised how some of them sound. Some have quite a legitimate bass, too. Maybe not bass of an expensive voluminous speaker in a good room, but better than one may expect. They do not come as cheap as they look. Cypherus, Blox, etc. In case you do not like earphones stuck inside the ear canal, or find over-the-ear kind uncomfortable, there is a whole world of decent-sounding earphones out there.