How are you planning to configure your sub? I am not aware of any problem with large fronts and the sub set to "on," but there has been some discussion of problems with the "L/R+Sub" setting and the way the crossover setting is applied (a problem that seems to be related in at least some cases with "rolling over" from 200Hz back to 40Hz). Unfortunately I haven't had a chance to do any testing in my system to try to get a firm understanding of what modes may or may not cause problems, so I'm basing my response on some of the comments I've been reading lately.

I'm planning on using a pair of AV123 Rocket RS850 speakers with an SVS PB12-Ultra/2 subwoofer. Since I don't have any of these speakers in my possession yet, though, I can't say with any certainty where I'll dial in the subwoofer crossover until I have them in my home theater room... I just wanted to make sure that the 990 doesn't completely cut off the subwoofer output when the left and right front channels are set to "large". I could have sworn I read that in one of these threads, but like I said they're all starting to blur together, which is why I was asking the question. Thanks...

The 850's probably don't need to run as "large" - their -3dB point is 36Hz, which is actually a little higher than my Studio/60's -3dB point (I've got my crossover set at 60Hz, by the way). I'd suggest running the 850's as small with either a 40Hz or even a 60Hz crossover. This will let the 850's pass off the lowest frequencies to the sub while still keeping in the mix in the regions where it is still relatively flat.

And the bass management problems I've been reading about won't affect a 7.1 setup as you've described?

Since I won't be listening to music very often in the home theater I can certainly wait for 2-channel bass management issues to be worked out, but if there are show-stopper problems with BM in 7.1 mode I'm going to have to look elsewhere.

Thanks.

That is correct, the bass management problems do not appear to affect that scenario.

Braidkid,

Yes the mains were off. I became suspicious when I was playing around with Scott's suggestion to implement the subwoofer's internal crossover as a fix to the full range analog signal. My irk was that I would have to flip the switch on the Sub everytime I changed input because the digital ones supposedly worked. As intended, the Sub's crossover limited the bass response on analog sources. But I still did not want to keep switching the sub so I consigned myself to running digital out on my pioneer and using that as my CD transport until the fix comes.

Lo and behold! Engaging the crossover on the Sub with the now digital signal produced the same results...dramatically cut (and now normal) bass response from the sub. That is when I unplugged the mains and broke out the RTA for confirmation.

If yours work, great. I don't think mine do.

Thank you, gonk. Now all I need to do is decide whether to wait until the 7700 is released or order a 990/7215 right now.

I am thinking about purchasing the 990 and the new Model 7500 (when available). I am also going to replace my current speaker system with the Revel Concerta system. The F12 is a full size speaker and I also have the SVS PC-Ultra. I listen to my iPod which is analog. My question is will setting these mains to large and the sub at a 40hz cut off work?

http://www.revelspeakers.com/

corrected url.

With the mains set to large, the crossover setting for the mains is not used unless you select "L/R+Sub" for the subwoofer setting (in which case the idea is to send a duplicate of the material below the crossover point to the sub, creating a sort of "double bass"; this is one scenario that appears to be having some trouble using the current firmware). According to this link , though, the -3dB point for the F12's is 52Hz, which suggests to me that the best way to integrate the F12's and the PC-Ultra would be to set the mains to small and use probably a 60Hz crossover.