Looking at Yamaha's EMX5000-12 powered mixer. Scenario: Provides 500W @4ohms mono out of left jack Provides 500W @4ohms mono out of right jack I want to daisy chain two of the Yamaha S115V (8ohms) speakers out of left jack. Does this equal a 4 ohm load, hence 500W @4ohms over the two speakers? I want to daisy chain two OR three SM15V (8ohms) monitors out of right jack. With two am I at a 4 ohm load, hence 500W @4ohms over the two monitors? Can I add a third monitor to the daisy chain or will this drop it past 4 ohms and trash my powered mixer? Thansk for any wisdom.