Polk Audio PSW10 via 1001blocks.com. The 10-inch polymer-composite ⦠... Monoprice 9723 via monoprice.com. Supported by a lone 10-inch subwoofer and a built-in high current amplifier for big bass, the Polk Audio PSW10 is the very best subwoofer under $100. Whether you love it or hate it, the truth of the 9723 ⦠None of them ⦠The Best Very Powerful Budget Subwoofer â The Polk PSW505. Full review | Get it on Amazon. The PSW10 and PSW108 are the same sub, 108 was for European market originally. While its deep-bass output was only about half as ⦠This older Polk subwoofer used to be a lot more expensive, but thanks to getting itâs MSRP ⦠This model, called the Monoprice 9723, is a great amalgam of an excellent enclosure, a good speaker, and a fair quality amplifier. If you are someone in search of a unit that provides you with an ample bass at a really reasonable price, then Monoprice 9723 ⦠Best Budget: Polk Audio PSW10 Home Theater Subwoofer. Even though the Polk Audio HTS 10 was the least expensive subwoofer we tested for this guide, it ranked second in our blind listening tests. So much so that the site had to test a second model, since they were inundated with complaints about their choice. The 9723 has gotten a load of heat since it was given the blue ribbon by The Wirecutter. PSW250 is older, and only 8 inch vs 10, but it might actually have slightly better build quality than the others.