Summary: I have a set of these in the kick panels of my S-10, hooked up to an Alpine 50 X 4 amp. (also powering a set of Infinity Reference coax. w/an extra tweeter) I have the components set to 60hz, the full range set to 120hz. Have a 12in. Kicker CompVT sub behind seat, Boston A. 4 X 6 in dash.
Summary: I always choose Infinity and these speakers did not disapoint. Great mid bass down to about 60 hz but they really don't go lower than that. They are designed with a subwoofer system in mind. The treble is quite loud but you do have an option to drop the tweeter by 3 db.
Summary: Even though this model of Infinity is the so called "entry level" of Infinity's products, I can honestly say that you can not tell. Crisp and clear mid range accompanied by piercing hi's is what you will get with these.