I am currently using 2 300S to power my 2 subs. The SF on those I believe is set between 18-20 Hz making them ideal for my application. The run very cool and have alot of power. The one I have are from PE. The 500 W version from PE needs the SF mod since it is set very high; the setting escapes my memory right now. The ones from Oaudio have the neat feature of a single channel PEq on it. I believe the SF in this one is lower and does not require the mod. They are both of the same build with slight variations.
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