A2

Or also the Beoplay A2 which is pretty much the same as the Dali Katch G2 (though the G2 is slightly better). The Beoplay A2 will be cheaper as there are a lot more out there. And yes, both the Beoplay A2 and the Dali Katch G2 are also imo the best sounding BT speakers.

You call yourself an audiophile yet are convinced this is by far the best sounding BT speaker? I’m confident in saying this is probably one of the very few you’ve heard. The crackling noise could be due to the battery being degraded and not being able to supply enough voltage/current. Something small that will cover the whole frequency range is the Bang & Olufsen Beoplay A1 (1st Gen). Anything else the same size will not go as low as the A1 does. Footsteps and such are usually low pitched sounds so that could work.

A beoplay A2 if you can get it second hand. There’s under 150 beoplay A2’s that are in very good condition

The Beoplay A2 is a great option. I say this with confidence, it's without doubt the best you can get for that flatness. You could otherwise get the Beoplay A1 which is smaller and just as flat, and sounds great too.

# Bang & Olufsen BeoPlay A2 is amazing bluetooth speaker, but you can only get it used since they don't make it anymore. I got one for $40 and had the battery replaced.