I prefer passive speaker due to I can use with different power amp I like. So far I use this with SMSL SA300 power amp with bluetooth feature then it works well with my ipad. it sounds nice especially mid range. Sound of guitar or saxophone...etc is pretty clear.
150W rating is big number for such small dimension speakers. I have not tried. but it is highly possible to be suitable in band rehearsal; PA in smaller field.
I've seen lack of bass issue from other reviews. It's true but I have method to improve it. It does lacks bass frequency especially sub-bass (frequency band around bass drum). if you also place it on desk or some plane rather than installing with wall mount, try spike stand. I get much stronger bass (the standard monitor speaker should have) after place 3 mobile ring stands between desk and speaker. Can't wait to try some real spike material ebony cone.