That does not pertain to the Reference Premier subwoofers. The limited warranty states the following:
warrants to the original retail purchaser that this product will be free from defective materials and workmanship for two (2) years on electronics and five (5) years on woofer, cabinet, and non-electrical mechanics on all subwoofers except the Reference Premiere subwoofers (RP-1000SW, RP-1200SW, RP-1400SW, RP-1600SW). Reference Premiere subwoofers will be free from defective materials and workmanship for five (5) years on electronics and five (5) years on woofer, cabinet, and non-electrical mechanics, from date or purchase, subject to the limitations below. This warranty period is not extended if we repair or replace the product.