Look at a MC 7300 owners manual. In the back they show how a 7300 can drive a 2 ohm load from the 8 ohm tap putting out more than 800 watts a channel. If you will look at a Stereo phile review of a MC 501 you will see how well a MC 501 drives a 4 ohm load from the 8 ohm tap putting out close to 800 watts still meeting specs. So I would not worry about you driving a low impedance from the 8 ohm tap of your 600 watt Mac amp. One of the British magazines tested a 611 and put out close to 960 watt peaks across 8 ohms. So there is plenty of current there so you don't have to worry. Now crossovers can compromise woofer capabilities and this may be why you are wanting more from your Mac amps. All I can say make the speaker lines large and short as possible and make sure you have 20 amp 120 volt AC circuit feeding each amp separately.
All speakers have dynamic limits and after reaching that level the speakers compress the sound not matter how much power you have available.
Last edited by TWInsall; 06-28-2021 at 04:19 PM.
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