i am going to be starting a build and thinking of getting a sundown saz - 4500d . these are the ratings
4500 x 1 @ 1 ohm
2000 x 1 @ 2 ohms
900 x 1 @ 4 ohms
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TEST RESULTS SO FAR :
3100 Watts @ 1 ohm nominal rising to 2.67 ohms on 14.4v dropping to 13.6 volts
4650 Wats @ 0.25 ohm...