Try checking in the preamp/prepro setup menu that your subwoofer is enabled, then check the level in that setup. Then check the level on the subwoofer itself. If all is well then check that the subwoofer connection is in fact connected to the correct output on the pre/pro.
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Try checking in the preamp/prepro setup menu that your subwoofer is enabled, then check the level in that setup. Then check the level on the subwoofer itself. If all is well then check that the subwoofer connection is in fact connected to the correct output on the pre/pro.