My Peavey stack comes stock with Sheffields, but my Fender half stacks 4 x 10 speakers dont say on the back what brand they are. I can tell there original, but its a vintage amp, and there old, so I am thinking about replacing them with some real hot rods that can handle high volume distortion, and thicker bass when needed. Im not up to speed on which replacement speakers are the hottest on the market now days for delivering real high quality sound at high volume levels, but thats what im looking for, some real durable earth shakers in a 10 inch, with an amp thats 175 watts :D