Behringer A500 Amp
JC, thankd for the feedback. How would I wire your suggested solution. Do I have any limitations or trade-off in terms of sound? Thanks again
To use the Behringer A500 and speaker selector you would connect the line level output from the receiver to the inputs of the amp. The speaker level amp outputs would connect to the speaker selector. 3 sets of wire would connect from the speaker selector to each pair of speakers. If you have impedance matching VCs for each pair of outdoor speakers, then you wouldn't need the speaker selector and could connect all wires directly to the amp. The Impdance Matching feature allows the stereo amp to see a 4-8 ohm load when more then 1 pair of speakers are connected.
For power, 50-60 Watts per speaker should be loud enough to annoy the neighbors. The Behringer, for example, delivers over 200 Watts into 4 ohms which is 60-70 Watts per speaker. If you want people to call the police you could hook up 2 behringers is bridged mode (500 Watts/8 ohms) and send the full 150 watts to each speaker.
For sound quality, many people on the Forum are using the Behringer in bridged or stereo mode as an HT amp with good results. Outdoor speakers are not a critical listening environment so it should be more than adequate for sound quality.