About a year ago I bought a quad of these to change in a 4x12'' cab I got with my first amp stack, a crappy solid state Fender Frontman head with crappy chinese made Fender speakers.
I took out all the speakers aswell as the wiring and re-wired the new Jensens for 4 ohms, this gives me 140watts total power. These speakers sound amazing, you cant compare them against the old. There's a real clarity in the highs without being icepicky and a low midrange that doesnt make it muddy. Takes a while before the speakers are broken in, always keep this in mind before sending them back or spewing your rage.