Hello,
Technical characteristics are described in the product AF.
Very simple, back side: a combo jack / XLR, a gain setting and a interuptor on / off.
Front: a small green LED indicating power on.
Note: NOT small red LED indicating the limitation and not limiting. No high-pass filter.
Power: more than enough (for me), see too powerful for a small piece.

SOUNDS

The frequency curve looks rather neutral. I test my mixes on different systems: stereo, headphones, speaker of listening boost, Beringher truth ... No problem.
THE LOW LOW and SUB: we hear them superbly, see too much for some (and I make Hardtek for me is great).
The meduims and treble are clear and not gentle on the ears.

OVERALL OPINION

I've been 3 months and I'm really happy.
I hesitated long between KRK Rockit and the tannoy in the same range (some views on Beringher, but I quickly abondonne). And none reflected both lower than the PM-1.

I think it is useless to have better quality speakers in a place not intended to be a studio (the room, the garage, the closet ...).
If you had reselect, I would resume the PM-1.