I own a Tivoli Model One and a Model Two; I saw no need to have a
subwoofer with the latter because the sound is bassy and there is no
way to adjust it (no tone controls -- I have actually written to Tivoli
about the need to incorporate at least a single control).
AM performance is decent with an AM loop (the radio is deaf without
it). I use the Model One as an external speaker with my Lowe 225 and
since the radio has a tone control, the combination works perfectly for
me.

RK