I recently purchased a pair of SuperZero 2.1's along with a SS-10 10 inch subwoofer direct from NHT to form a 2.1 full range system. The overall performance of this new system is excellent. Bass performance of the Super Zero 2.1 by themselves is only good down to around 85 hz which is to be expected due to its small 4-1/2" sealed woofer; however, the midrange / high end performace above 85 hz is amazingly good. Also, these little speakers will play surprising loud without distoring Overall sound quality is very wide, clean, and natural sounding with excellent musical detail whether listening to music or watching movies. I'm noticing little details in the sound that I never heard before on any of the previous speakers systems I've owned. With the Super Zero 2.1 combined with the SS-10 subwoofer it forms a full range system comparable to other speaker systems selling up to three times as much or more. So far I am extremely pleased with the performance of both my Super Zero 2.1's and the SS-10 subwoofer. NHT makes great sounding speakers.