For over a year jOperation these speakers (pair) ds proximity in a small piece for film music, etc., I have the amplified version 80wrms. Manufacturing is the same as on most speakers amplifiers can be found at the back 4connecteurs jack (mic, line1, line2, link out) and three knobs (volume line, mic volume, and EQ) and the cot Desousa has no respect for acrocher has suports the front grille is very strong (a small detail, the logo rotates to position a floor or facade). I find the sound of nickel most of the music (electro in general), the treble becomes a bit confused and screaming at high power. I have also used both in return qq scne for singers and sonn very properly, (the concerts are not huge either), I think these speakers can be used in a satellite ac subwoofer amplifier for the small mobile disco quality sharpness ds the medium makes these speakers very good speakers animated commercial for example. We can note a slight breath when it does not leave her, it's quite annoying room ds o tt no one listens to the time the music, but bizzare, I never hear a breath reus when I put to music, even at very low volume. I was given these speakers I do not know the price but I estimated a 350 piece. Trs satisfied with this product, if you'll reproposes another pair I would jump on it without hesitate