I used to have a pair of E-715's ... had them about six month got them almost half price ... They do put out gobs of bass but it is what i would call an overboosted bass.. the speakers claim to be 8 ohm compatible however the woofer is 4 ohms and the mid and tweeter are 6 ohms. I ran them off of an adcom GFA 555 amp and it seemed like they were begging for more power... greeat thumpers you wont need a sub with them but the midrange and tweeter are muddy sounding. I bought the speakers for a heated garage thinking i wouldnt need a sub.. After listening to them after a while i finally just got rid of them... I have Klipsch RF-7 in my living room and the cerwins are no where near as accurate... I would recomend the E-715 to anyone who wants a party speaker ... they play loudly and will rattle the walls but if you want accuracy look elsewhere