Axiom Home Page Forums General Discussion Technical Questions Iron Man 2 fluttering

There will be some audio of the earthquake in the mains that'll be tied to the action on screen. To give an example: Sounds of cracking pavement, scraping rock, etc., and still some rumbling sounds. But the actual shaking effect will be encoded into the LFE channel.

yes, most modern receivers, if you set the sub to "none" it will automatically set the front L&R to large and send all LFE or any crossed info from surround & center channels to the front L&R. so until he gets a sub, like you said, select yes that there is a sub. also for the front L&R channels he can adjust the level for each channel, that will help with too. also in most modern receivers in order to have double bass, your front's have to be set to large or full in order for that to work. another thing i found that's interesting on most Onkyo's is that if you have the speakers full (and your only listening to 2 channel analog or you only actually have 2 speakers) you won't have a sub because the receiver will send everything to the speakers. you actually have to back it up to say 40hz, then it will automatically allow the sub to function and you will have 2.1 then you can cross over to the sub.

Got it, thanks. I guess I never understood the difference since I never had a sub, had the sub setting on the receiver to NO and therefore had the LFE channel redirected to the mains still creating some light shaking at high volume level..

I need to check when I get home - I think I have the 60s on Small. Let's say they are set to large but I am not listening at reference level or near reference - If I understand, I should be ok?

Yeah, you should be OK, except you could be wasting amp power trying to drive the speakers at 15 Hz, and getting no output in return.

I just thought of a problem for people who have surround speakers but no sub. When setting the sub channel to Yes, any speaker set to small (as the surrounds are likely to be) will lose the audio below the crossover point.

It's a real shame that receiver makers decided that Sub: None means "send the LFE to my mains". As I said, that goes against what Dolby used to recommend. They said that losing the LFE channel was fine, and that audio mixers should not put anything there that would be missed. The big problem with mixing the LFE channel into the mains is it is supposed to have 10 dB of gain applied before playback. So it isn't even at the same level as the other channels.

So, sub = yes, is fine if all your other channels are large (like a setup of all M80s/VP180s), but setting any channel to Small means losing actual content.

Thanks, Chris. It has been a while since I set them up - like I said, I am pretty sure I set all to small.

If the impedance drops low below 20hz the speakers will be drawing a boat load of current especially at loud listening levels. Not only would you be wasting a lot of useful power but its also a good way to clip the amp as well as overheat and put a receiver into protection mode. This would not be good for the longevity of the electronics and/or speakers.

Wow 3 pages thanks for the input. I have played some more movies and everything seems fine. In a couple of weeks I will be buying a ep 500 to match everything so problem solved. When the sub comes I move the speakers back to large right?

No, when the sub comes it'll start playing the sounds that you've removed from the speakers set to small. It's better use of amp power, and speaker dynamic range to do things this way. There really should be no speakers set to large when playing movies.

For two channel music, you may want to use the M80s alone, but if you have the sub placed, and calibrated well there'll be no reason.

When I set my speakers to small it puts the sub to yes? I don't have a sub? I can move the center to small but when I put the front to small the sub turns to yes from no??