Review on 🔊 Monoprice SSW-10-133830 Slim 10-Inch Powered Subwoofer - Black | 150W, Low-Profile, High-Performance Amp, Low Pass, 10-Inch by Chef Deane

OK, don't expect too much from such a flat subwoofer. But just for reference, a ported case should provide about 3dB of gain over a sealed case, all other things being equal. This is equivalent to using an amplifier with twice the power in watts. Anyway, I bought two of these subwoofers and they don't compare to the one sealed 12" Velodyne subwoofer I'm looking to replace (at 1/4 the combined power of the two subwoofers - 80 watts btw). The woofers, plus the bass reflex design, these things should be at least as loud as my Velodyne, but they don't even come close. And they don't respond nearly as rarely, despite their claims to the contrary. They're all mid-bass machines. I literally get louder and lower frequencies from my front main speakers, which kind of defeats the purpose. Everything below about 35 Hz is so quiet when playing that it disappears into space. If I try to turn the gain up enough to hear low frequencies, they just distort so much that you can't hear the music or the movie track anymore.