Matt: I don't know if you are bridging the amps or running them in vertical bi-amp mode. When you bridge an amp, it effectively sees half the impedance of the speaker. As such, an 8 ohm speaker looks like a 4 ohm load. As such, an amp that runs in Class A up to 6 watts at 8 ohms is only going to run in Class A up to about 3 watts at 4 ohms. In plain English, as impedance is halved, so is the amount of Class A power that is available ( in an AB amp ). As such, the higher the bias at 8 ohms, the better off you'll be at any impedance. After all, most speakers are not very stable when it comes to impedances as they tend to vary across the frequency range.
As to what your specific amp is biased for from the factory, give them a call. You'll probably get a pretty generic answer but it will at least give you some type of an idea. Sean
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As to what your specific amp is biased for from the factory, give them a call. You'll probably get a pretty generic answer but it will at least give you some type of an idea. Sean
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