The problem I always had with the 950's double bass problem/feature is it doesn't add the bass quite at the frequencies where I want it, unless the only place I want it is the sub crossover frequency and below. Sometimes I want a little extra PUNCH, aka double bass, but at a higher frequency than that. Yes, as you note, one way to do that is to adjust the crossover frequency. And along those lines it's possible to crank the 950's sub output. We've all done that, I'm sure, at one time or another!

But I think a better way to add PUNCH is with tone controls. How do the tone controls of the 990 compare to the 950? Are the tone controls more extreme, the same, or less extreme (aka more "purist")?.

Best, Will