I don't look for such a flat response spec, I look for indicators of good tone, fast, tight response. With Roon providing parametric eq options and many subs now offering similar via mobile apps its super easy to tune the sub to either your tastes or your room- both by eliminating boom, peaks, dips etc.
Why do you guys pursue a flat frequency response when you buy a subwoofer?
As we all know, most audiophiles spend a fortune for that flat frequency response displayed on the manufacturer's specs when you buy a subwoofer. Why do you do this? The minute you put that flat sub in your room and take some measurements, it is anything but flat (it's a rollercoaster with all kinds of peaks/nulls etc, EQ to the rescue).....So, why do you dudes continue to look for the flat line? What's going on in your mind when you're shopping around?