I had after the lousy pictures here the impression that the black box THAT CONDITION cheap. In fact, the opposite is the case. Are our right and left of a black electric piano (Kawai, piano finish) and match it perfectly. The sound like it very much, even if it no direct comparison to more expensive boxes of course difficult is to be evaluated. The cable connector on the back looks elegant, but I find it impractical. Despite solid screwing my cable slipped while moving the box several times out again, the bugged. The manual was in this respect except one image also produce nothing. Oh yes, you have to order from the pits probably at least. 2. ;-) Addendum: I run the boxes to an old Denon PMA-717 (35 watt output per channel at 8 ohms and 20-20,000 Hz; 8-16 ohms). In the manual of the boxes is specified as a necessary minimum power for the amplifier 30 watts. The efficiency of the boxes but well, that is, compared with older, small boxes, they are at least as loud at the same volume Stronger rule creation. At less than half the position the boxes for a room of 20-25 square meters are always loud enough. On the back 4 screws for the loudspeaker cables are available. Ie., You can still drive tweeter and woofer separately if you want to. Otherwise, you will leave the bridge.