Report Black friday subwoofer system upgrade ideas... in Bass Gear Posted November 29, 2019 hello, there is a 15% off on parts express right now, and i would like to upgrade subwoofer system. I currently own a pair of 18 sound NLW9600, in single bandpass box 7cu each, after displacement. they are 8 ohm, and i run them with an inuke 6000dsp. They sound ok, but i would like to run the amp at 4ohm, and was thinking on 2 options. A) Getting 2 LaVoce SAN184.03 18, to run all 4 subs, to work the amp at 4ohms per chanel . B) getting 2 B&C 21DS115-4 21 , and sell the 18 sound. A) the cons, more hauling, 4 boxes....2 different kind of subwoofers. Amplifier could heat? A) the pros, almost 6db more, more cone area, and more power. B) the bad, more costly. Less cone area than four 18s. B) Same subs, only 2 box to haul. I would apreciate your help, and advise.