The SUB 600 is, as in Canton usual, very well made. It offers a lot of connectivity options. I run him connected via RCA cable as an active component on the sub-output of my AV Receiver.
The subwoofer has infinitely variable control to adjust the phase shift of up to 180 °, for about Ahmet race frequency and the volume level of the internal amplifier.
I find this as an additional filter makes sense, even if the can be adjusted in almost all AV receivers, this subwoofer can then still be operated on conventional stereo amplifier or amplifiers and adjusted.
What I also like is the auto-shutoff on standby and the ability to recharge if necessary.
Expectations were eventually met, the subwoofer completes the deep bass downward sufficiently from and relieves the large front speakers and the AVR with bass intensive scenes in addition. Even with stereo music playback runs now also with yet. The deep bass draw now even more intensively on the sofa, as it wanted to have.
However, I would at spaces from 20 m² but recommend a second 600 subwoofer or to the more powerful models as the small 22er then at level but at some point the breath stays away and he then begins with its light 9 kg to hop around on the ground , He also loses at high level and above 100Hz but then significantly to precision and then plays a bit too spongy and unclean. The need then the larger models but can do better.
Otherwise, the normal claim, in a 16 m² room, he plays very good for the money invested.