Bass as low as 57 cycles? Really? Really. Haven't bought car speakers in years. These are impressive. They replaced the stock speakers in my 2004 Mazda 6. I was planning on eventually adding a subwoofer, but don't feel the need right now. Bass response isn't butt-thumping like a sub, but it IS gut-grabbing. I'm hearing things in the songs on my CDs that I haven't heard before. Probably never will install a sub. Very impressive!
Pros: Impressive reproduction throughout the listening range. Especially the bass.