**** FSX65 BUYER, BE AWARE THESE 6.5 WOOFERS ARE POWER HUNGRY. **** I started driving these FSX65 with an old DB Drive A3 2250.5 5 channel amp. 65watts x 4ch at 4ohm. It barely pushed these FSX65. I then upgrade the amp to Taramp DS800x4 4chx 135watts at 4ohm. WOW!! NICE clean, smooth mid-bass. I then decide to puh the limited on these FSX65 by connecting them at 2ohm 200watts RMS. My 1992 Toyota pickup now sounded like a concert hall. These FSX65 clearly perform way better with 200 watts RMS without any stress. I don't understand why Skar Audio would rate them so low at 150rms only. Anyway, Great Job, Skar Audio. I can't wait to upgrade my 2019 Toyota Tundra audio system with Skar Audio speakers. NOW, only if I can get my hand on one of the Skar SKM9005D Amp.