Rockville RVB8.1A Powered Subwoofer vs Polk Audio PSW111 Subwoofer

These are not rivals in the same room. The Rockville RVB8.1A is a 12-volt car sub: an 8-inch driver in a vented hatchback-style box with a built-in 200W RMS Class AB amp, RCA and high-level inputs, and a dashboard bass remote. The Polk PSW111 is a 120-volt home theater sub: 150 watts of Class D power, 38 Hz low-end reach, a 60–160 Hz crossover, and a 5-year woofer warranty. Buy the Rockville to add bass to a car or truck; buy the Polk to add bass to a TV or stereo at home.

• Choose the Rockville RVB8.1A if you want one box that drops into a car or truck and includes the amp, wiring harness and dash remote.
• Choose the Polk PSW111 if you are building a home theater or stereo system and want a compact sub with a long woofer warranty.