I went to buy a replacement subwoofer for my home & most of the speakers in the home audio book are 8 ohms.My subwoofer amp is only 100 watts(peak) The blown subwoofer is 4 ohms. My Q. is If I buy a 8 ohm subwoofer will it become only a 50 watt peak? The FTC rating in the owners manual reads as such...less than 1 % THD @ 56w@ 100HZ@ 4 ohms. My 12db/Oct adjustable crossover only goes from 40HZ TO 180HZ