The Seismic 12a subwoofer is a compact bass powerhouse. Barely 15″ in dimension (WHD), this sub packs a 12″ high excursion mineral filled polypropylene cone (downward firing) that has a 29lb magnet attached to it and is driven by a 1,200W onboard amplifier. On its two sides, it has two 10″ passive radiators. The Seismic 12a will dip all the way down to 35Hz and top out at 150Hz. With this wide range, it can be easily matched to any main stereo speakers for a full range sound. If a rock solid bottom end is what you want without sacrificing too much real estate in your audio room to put in a big sub, this might do it for you.
Cosmetically, the sub is in very nice shape. Some minor scuff marks here and there (a scratch line on the acrylic top is its main “defect”) but nothing major. We don’t have the original box but will securely pack it for safe shipping.