Is there a way to revert or reload the older version of the the firmware if you are not satisfied with the upgrade?

I don't yet have a 990, but am very seriously considering getting one. I think I have a simple question, but these bass management bugs are so complex, I'm having trouble knowing if my question is simple or not.

If I set my fronts and center to large and my surrounds to small and my sub to LFE, will I be happy with the 990's bass managment?

My criteria for happiness are: 1) movies sound right with the sub doing it's thing on explosions, passing jet planes, exhaling dinosaurs, etc., 2) when I switch to 2-channel stereo to listen to CDs, there is no sub, and 3) I don't have to continually reconfigure anything as I jump between DVDs, 2-channel stereo, 7-channel stereo, ProLogic IIx, etc.

Looking at the bass management matrices, I think I won't encounter any problems. But since I don't know precisely what was wrong with bass management before the upgrade and how things have changed now, I can't tell for sure.

Thanks for the input.

In the scenario of fronts and center large, surrounds small, and sub LFE only, your sub will pick up low frequency load from the surrounds (which will not be significant) along with the .1 LFE track that is intended for it. I wouldn't see any problem with that.

Jeff
I have Martin Logan mains and center, Spica TC50 side & rear and 2 LFM-1 subs. I set my mains to large everything else to small and subs to LFE. I have not notices any problems. With this setup the bass can be suttle to shake everything off the walls, it depends what you want. If I use the 990 for 2-channel music I use bypass which only uses the mains (I believe). The bass has never been a problem in having it over powering with any of the settings you are asking about. Even with all of the problems some people seem to be having. I would not hesitate to purchase a 990. I don't think you will be unhappy. Give it a try the worst that happens is you send it back at 30 day. But I doubt you will.

Oh my, the firmware upgrade has arrived. I guess that means they're passing out ice scrapers in the netherworld. 8-)

I'll have to give this a try.

Cheers,

I think the term large or small when selecting speaker size can be somewhat misleading. I think of the Rocket 750's as being a large speaker, but have set it as small and have the crossover at 60hz. AV123 as well recommends setting the speakers to small and using a 60 or 80hz crossover. This seems to work will for movies and multichannel music. For two channel, I would like to be able to set them as large , bypass the subwoofer and just use the left and right speakers.

With the new firmware, how are you guys handling prologic analog signals from a vhs? Does the sub setting l/r+sub work in this mode if front speakers are set to large? The matrix states in Dolby mode "Sm spkr bass + LR bass". Does this mean that even though the fronts are set to large, that anything below the crossover setting for the fronts also goes to the sub?

In other words:

Front: full range
Sub: front (below crossover) + "small spkrs" below crossover.

Analog sources that are processed with Pro Logic follow the same bass management logic as digital sources. That means that for large mains and the sub set to l/r+sub, the mains get a full range signal and the sub gets low frequency data from any small speakers plus the low frequency data from the fronts - exactly as you describe it. Even though the fronts are set to large, the sub gets low frequency data from those channels, as is intended for the subwoofer setting of L/R+Sub. Setting the subwoofer to LFE in that case would prevent this (the sub would only get low frequency data from small speakers in this case).

Sorry for repeating my post but does anyone know if the older version of the firmware is available if you are not pleased with the new version? I have not installed the new version but would like to know what my options are if I do.

Ok Gonk that makes sense. Doesn't this solve the issue then for those guys with analog stereo, such as from a cd, that want some of the lower frequencies from large fronts passed off to the sub? This is of course assuming that there is little noticeable loss in the adc-dac conversion in the 990 when moving from the bypass mode to the stereo mode.