<b> SOLUPEAK P2 is a 2-way amplifier or 2 pairs speaker selector box; <br>2-way amplifier selector box: it work to accept two amplifiers or receivers to share use of one pair of loudspeakers through the switch A/B on the front (Switch AMP/A or AMP/B). <br>2 pairs speaker selector box: it work to accept one amplifiers or receivers to switch two pairs of loudspeakers(Note:this way is switch one pair loudspeaker A or loudspeaker B work,They don't work at the same time )<br><br> <br><br> This is a good idea to solve the problem of unplugging and plugging the speaker wires. <br><br><br><br> NOTE:<br> If you have tube amplifiers,please be sure to put the tube amplifiers in standby or turn off the tube amplifier. Tube amplifiers should never be run without a load. </b>