AVIA setup DVD asks me to turn off my sub...

[OliverB]

well, in a way it does. I just got it today and did the speaker adjustments, finetuning what the auto setup got me. But in order to get the sub to the same level as the speakers I actually have to turn it off. Is that odd or what? I have my fronts as large (which they are) and was running the test tones at 85db for all speakers, but the sub went up to 88-89 immediately, and it was already set to -5.5
I can only go to -12 then my Denon turns the sub off, which I ended up doing while adjusting. I went back up to -5.5 now since I'm sure not gonna turn that baby off.

Is that normal? Auto setup also sets it at 29ft away instead of the 13.5 that are actual, but I guess that's because of the tiny delay from the subs internal electronics.

But it makes me wonder why I can't get the sub down to the same level as the speakers with the AVIA test tones, after all, that's what they're made for...

Any ideas?

Oliver

 

[j_garcia]

The large setting has nothing to do with the physical size of your speakers, it has to do with their frequency response.

Your sub should also have a gain (volume) dial on it, and you need to adjust this as well as the setting in the receiver to reach a medium point between the two so you don't have one or the other adjusted all the way to one extreme or another.

There is no delay in the electronics of the sub that would make any difference. Most likely it made this setting because your sub's gain is not properly adjusted.

 

[OliverB]

the sub is set to 1/2 of it's volume. It also sounds just fine to my ears. I know the large setting has to do with what the speakers can do, just thought it might influence these settings a bit.

I have not yet fiddled with the sub settings with 180 degree inverted and all that, I need a 2nd person to throw those switches in the back while I listen. Just found it odd that the db level of the sub is so high.

More fiddling necessary I guess.... ;P

thanks!

Oliver

 

[MDS]

AVIA plays the LFE test tone in both the mains and the sub and since your mains are set to large they are reproducing the entire LFE signal as well as the sub. If they were set to small, as is usually the best case, the receiver's xover would be sending the majority of that signal to the sub instead and the spl meter would be reading the output of the sub with only minor contribution from the mains. That I think is one problem. I bet if you use the internal test tones instead of avia, your results will be different because the test tone will be sent to the sub only.

The other thing is what j_garcia said. You have to fiddle with both the receiver sub level and the subwoofer's gain knob.

 

[OliverB]

interesting ideas, thanks!

this might be a dumb question, but if I set my speakers to small, will that only be used during movie playback, or also for CD, radio, etc?

Oliver

 

[MACCA350]

Posted by j_garcia

There is no delay in the electronics of the sub that would make any difference. Most likely it made this setting because your sub's gain is not properly adjusted.

The subs gain control will not affect the distance chosen by the receiver unless its down too far and the receiver thinks there's no sub. There definately is a slight delay in the subs electronics and this differs from sub to sub depending on the design and electronics involved. It dosent take much of a delay to effect the setting as 1 millisecond delay = 1 Foot in distance
Another thing that will effect the receiver distance, apart from placement, is the phase control on the sub, flip this 180deg and run the auto setup again and the distance will change.

The receiver reads the actual time it takes for the sound to reach the mike and adjusts the delay time to time align all the speakers and this will be more accurate than doing it by the actual measured distance.

cheers

 

[MDS]

interesting ideas, thanks!

this might be a dumb question, but if I set my speakers to small, will that only be used during movie playback, or also for CD, radio, etc?

Oliver

As long as you have subwoofer=yes, the receiver will redirect all bass below the xover frequency from the channels set to Small to the sub, regardless of listening mode and source. On my receiver (Onkyo), if you set subwoofer=No it won't let you set the fronts to anything but Large.

 

[OliverB]

thanks! I'll try that 180 degree switch next. But I'm pretty happy with my sound right now. I watched The Wall last night and there was some deep bass in there that I never knew existed! Sweet!!

The delay in the sub is written about in the Denon booklet, and the auto measurement places it at 29 ft away, which is somewhere outside at my fence

But it seems to be correct, at least to my ears the bass is where it's supposed to be. And things are rattling

Oliver