A:AnswerThese speakers can handle a fair amount of power up to about 125 watts 8ohm. Note: B & W speakers routinely go as low as 3 ohms and one should have a powerful amp strong enough to handle those wide swaths of sound without clipping.
A:AnswerThe 600 and 700 series are designed in England and assembled in China. Some of the crossovers are made and/or designed by Mandorf. The 800 series are still produced in the U.K.