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Using Dual xpr520 for 2 12's?

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bridging the amp to 2 ohms? you'll probably smoke the amp.

it has a 30 amp fuse. so its good for like 150x2 at 2 ohms. or 300x1 at 4 ohms.

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Straight from the owners manual.google is your friend.

Speaker Connections

Connect speaker wires observing polarity. The minimum impedance load for the XPR520 is 2 ohms stereo and 4 ohms bridged. Use of loads lower than these is not recommended and may cause amplifier damage. The XPR520 can be wired for stereo, bridged or stereo/bridged simultaneous operation.

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