The amount of emails I get from people who blew a sub and blame it on the sub because they think the DD-1 is gospel, is just silly. The combination of lower quality amps strained on not the best electrical systems, with gains set to almost or at clipping at 1 or 2 frequencies, is just . The masses (not everyone), from my experience, that are using the DD-1, are cheaping out on their electrical, but spending good money on their subs. This means, their point of focus when something fails because of wrong gain setting, is the subwoofer. So while others are making money off some blinking lights, it is causing me and others with speaker lines, nothing but constant headaches and more work, and in some cases pissed off or lost customers.