Monoprice released two tower style subwoofers, the Monolith M-210 dual 10-inch subwoofer & M-212 dual 12-inch subwoofer. Both are THX Ultra Certified up to 3,000sf rooms. Big Bass, on the cheap.

Can Emotiva's Ultra 12 $500 12-inch subwoofer really compete? We weren't sure, so we got one and hooked it up. The Ultra 12 sub sports a 300W Class D amp and plenty of punch.

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