In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The most widely recognized and trusted name in AC power conditioning is proud to introduce the PL-8 PRO Series II 20 amp power conditioner, featuring Furman's revolutionary series mode protection plus (SMP+) circuitry which incorporates our exclusive Linear Filter Technology (LiFT). Together, these technologies comprise what is, without question, the world's most advanced and comprehensive transient voltage surge suppressor.