the DD-1, like it or hate it, has brought setting gains PROPERLY to everyone's attention. It's funny how all the O-scope experts came out of the bushes once the DD-1 was released though.......when before you never saw anyone except trained installers for high end shops using them. 1 in 100 shops if i had to guess. Which brings me to my next comment. To NOT believe in the DD-1 is to NOT believe in an O-scope. But the DD-1 is better because it is easy to use, more portable, easy to understand, and faster. Also the price vs. accuracy. Sure you can get a hand held scope for about the price of a DD-1.....but have you seen the resolution on those screens? Only expensive units have resolution that can get close to the DD-1. In other words what looks like a nice clean wave on that crappy screen really might not be. The DD-1 knows what is clean and what isn't.....and is on par with O-scopes worth 10's of thousands of dollars not just the $99 special online. Even my $400 TPI 440 scope cant touch the DD-1. The resolution is just not there. Also, half the people that have a scope aren't even using it right. For example someone a lot of you guys love even posted up a video on how to set gains with a O-scope and did it completely wrong. Everyone was like "wow, nice job" when it was a bunch of crap. My point is just because they claim to like a scope better and are against the DD-1 for whatever reason, that don't mean they are even using it right. At least learn the tool before you make your judgment. And most that use the O-scope correctly have no reason other than my name NOT to like the product.
Now don't get me started on the DD-1 PLUS. O-scopes can't read your overlaps before you start a tune up.......the same ones you record in your notes when sending a customer home, so you can see if the gains have changed since it was set up.
also, i might add, i have seen people gain DB from turning the gains DOWN to their correct position....so extra hard clipping doesn't always make extra DB.
regardless....scope or DD-1 lover, a REAL shop should use one or the other because if done properly it really saves a lot of equipment and SOUNDS BETTER.