Can I bridge the unused channels if I am only driving 5 channels?

I'm afraid that you cannot bridge channels on any of the Outlaw amps. You can bi-amp if your speaker allows it.

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gonk -- Saloon Links | Pre/Pro Comparison Chart | 950 Review

Hi Gonk,

I am considering the purchase of a 7100 amp and was planning to bridge 2 channels to drive my passive subwoofer. The way I would do this is by connecting the sub audio line to one channel and invert this signal (I have a small line inverter box) to connect to the 2nd channel; the woofer would then be driven from the 2 red terminals, the plus from the non inverted signal and the minus from the inverted one. My woofer is 8 ohm, but in this configuration, the amps would see 4 ohm which should not be a problem for the 7100.
I would appreciate your feedback on this.

While the theory of your proposed subwoofer connection has merit, unless one was fully familiar with the engineering of the 7100, especially the power supply arrangement, I would be hesitant. If I were considering that method, I would certainly get an Outlaw engineer's OK first.

I am currently running in this bridged configuration with a Hafler DH-200 without any problems, but maybe the 7100 does have some special PS wiring. Thanks for the suggestion, I will contact tech support on this matter.