What Chris means, I think, is that many Beocenter 2200's
were originally sold together with some X-type speakers and
it would easily pull larger and much better speakers and at
the same time give much better results.
It's a japanese hybrid (IC) amplifier construction so, soundwise,
probably can't be compared directly to the older
B&O DC-coupled ones but given good speakers it will
perform quite well and does actually pack a fairly good punch.
4 or 8 ohms is not really that important as long as you only have one pair of speakers connected.
Martin