Hi folks. I currently have a Polk RM6750 subwoofer which came with a home stereo set. The back says its 100 watts. Receiver is Yamaha RX-V465. I'm looking to get a better subwoofer but not sure what is good and what is not. Just look for higher wattage? Sometimes I hear the sub go past its limits and it kind of sounds bad so I want to improve this. Just looking to upgrade. Thanks
You need to specify price range.
The only way to KNOW FOR CERTAIN that performance is high, is to base purchase on a product that has had extensive 3rd party measurements performed, that include SPL vs. distortion at various SPL levels and other measurements. You can, to a degree, ascertain with reasonable confidence, the performance by also basing it on other products in brand families that are closely related to products that were actually analyzed as I specifed above.
The starting price for serious sound quality powered retail subwoofers is about $400-$600. Or you can spend a little more on a sort of 'kit', that involves you simply assembling pre-finished parts, and get even higher performance. I can recommend such things that will give you extreme high performance for less $$ than going to a retail product. $800-$900 in retail can get you a good subwoofer if you pick very carefully. $800-$900 doing it with parts suggested by an expert can give you a reference grade product that you can not really improve upon reasonably with any retail product.
-Chris