Here is a message straight from Scott. Less than two hours for a reply too!

Hello Ben,

Thanks for contacting the Outlaws!

Amplifiers increase or decrease amperage based upon the impedance or resistance that a speaker pushes back on the signal. This means that the lower the impedance, the higher the amperage and in turn the higher the output wattage. So in answer to your inquiry of "if the speakers are capable of handling a 4 ohm load, will the amp always try to output at 4 ohms", the amp will increase or decrease the amperage based on whatever impedance it sees. As your speakers increase and decrease their impedance over the frequency spectrum, the amp will adjust automatically. Since they have a nominal impedance of four ohms, the amplifier will operate those channels at 4 ohms for the majority of the time.

As for your bi-amping inquiry, the mids and highs would receive 150 watts and the low frequency drivers would also see 150 watts, bringing the total to 300 watts. As a side note, you may want to check with Mirage to ensure that you do not need an external cross-over when bi-amping their speakers.

Please do not hesitate to let me know if you have any other questions.

Best Regards,

Scott