Question adding in-line amp for outdoor speakers
I am new to this forum, so hope I am not breaking any faux-pas. Thank you in advance for any help you can give.
I have a Harmon Kardon HK 430 in my living room, and I absolutely love the thing.
My questions stems around using this as a multi-room receiver. Can it be done? The details: I have this thought to use the b channel to run wires to a pair of outdoor speakers. Should/can I get a tube amp after the receiver to the wire, then to volume control, and finally to speakers.
Do you know (as I was not sure about the results of my internet-ing): are the speaker outputs able to be amplified, and if so what sort of amplification do you recommend? I am getting 50W outdoor speakers, and running the line approximately 50 feet (with navigation of walls, etc). I have been looking at some 100W/channel X2 amps, but want to be sure I won't break anything. I would like to also stick with tube, but want to first figure out if this is necessary/doable/advisable. Thanks a million!