I've been told to look for a woofer that has very low ZMax figure. What range of ZMax figures should I be looking in 15" or 18" woofers? What trade-offs are there to using an extremely low ZMax figure? I see the cheaper models of woofers have a lower ZMax figure and the more expensive flashy ones have a high figure.
The amplifier I plan to use has a damping factor similar to SET or other tube amplifiers. Power i'm driving is 25 watts x 2.