Anyone ever seen such an Extension Speaker connection as this that can explain it, please? I initially assumed it was 500 watts with just the internal speakers and 800 watts with an external 8 ohm cabinet (split evenly with 400 watts to internal and 400 watts to external). But this obviously adds another option into the mix.
It looks switchable to use either an 8 ohm or 4 ohm cabinet? So I'd expect that the 8 ohm external cabinet at 400 watts gets half the total 800 watts total and the internal speakers get the other 400 watts (implying an 8 ohm internal speaker load)?
But how would the 4 ohm switch enable a 4 ohm external cabinet to take 500 watts and leave just 300 watts to the (assumed) 8 ohm internal speaker load? That's a new one on me, if that's what it does.
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