Even so, it is arguably the best SUBWOOFER amp ever made. It has an outrageous DF, and a huge current reserve so it is great for hauling around woofers with accuracy.
The sound you get from it in "normal" listening *might* be variable, since they are more or less class B pro amps with an extra feedback loop in the Macro Reference as compared to the Macro Techs... so the bias setting could have a pretty dramatic effect on the resultant sound coming out. They're set near the hairy edge of A/B in the pro models coming from the factory and I can see crossover notches with no problem on the scope. Of course, they should not be set this way in the Reference, but I have not had a Reference on the bench to be sure of it.