Just wondering if the ARC system analyzes and adjusts the response plot of your listening environment when you have a sub woofer incorporated? I am assuming that it would be different from just a straight two speaker near field system. Thanks, h

I like this question.

My first thought is that a system is a system... and the test mic hears the whole system.

Then I thought to myself, "hey what happens if the subwoofer is over on one side of the room?"

How can a dsp process that works before the speaker crossovers differentiate between the sounds being sent to the different drivers that make up a speaker system?

I think it is an interesting question.


best regards,
mike

Haven't installed ARC 2 yet, and haven't re-tested since I added the sub.
I can say that with the sub the current correction is off (as it should be).
I shouldn't put words in Danny's mouth, but I get the impression the ARC 1 works fine with the sub.

T

I think this kind of answers Mike's question.
From the Adam sub manual:
c) Satellite Filter
The satellites in a system can be driven full range or with a 85 Hz high
pass as recommended by Dolby® laboratories for use in surround setups.
Recommendation: If possible the main signal should go into the
Subwoofer. Connect your satellites to the Subwoofer output, either
via XLR symmetrical or RCA asymmetrical. In many cases, clarity and
dynamic range of the speakers can be improved if they do not reproduce
very low frequencies since they do not have to deliver big amplitudes.

As to "hey what happens if the subwoofer is over on one side of the room?"
From the Adam manual:
It is common knowledge that low frequencies (below about 100Hz) are non-directional, meaning they can hardly be located by the listener. It is, however, a common misunderstanding that therefore the placement of a subwoofer does not matter. It does matter.
Due to the fact that every room (geometry, furniture, etc.) is unique, the following descriptions intend to be a first introduction to the subject. The aim is to assist you tackling the most common problems with subwoofers and room acoustics, notably interference and standing waves.

HTH

"It is common knowledge that low frequencies (below about 100Hz) are non-directional,"


That is not a true statement. I know why people make that erroneous generalization but that doesn't make it true.

It is true that the statement they have made is commonly repeated... but it is an erroneous statement.

That is why they back pedal and attempt to explain further why placement does actually matter.







Here's what got my curiosity sparked:

If you are testing for the right and the sub is on the left ARC will build it's fuzzy logic, convolution file package and attempt to correct everything, however it has no practical way to control the actual driver discretely so what ever solution is employed will effect the entire system before the cross over.

That's the part I find fascinating... what happens to the common spectral range that is coming out of both the sub and the mains? Crossovers have a range of overlap and so there is some portion of the sound that is coming out of both the sub and the mains. It's the same sound... coming from 2 places.

I'm imagining a scenario where the speaker on the right is getting info that includes compensation for sound that is actually emanating from the left and it all gets generalized into a single "solution".



An extreme example might be if you swapped your speaker placement e.g move the left one to the right and the right to the left but didn't tell ARC. It can probably work it's magic and make compensations to make the best of that circumstance.



It seems, to me, like a compensation system could be even more effective if it treated each and every discrete driver AFTER the crossover rather than treating speaker systems as systems.



Just wondering out loud.


best regards,
mike

This goes back to sub placement in your room. You still need to select your own optimal placement for your sub for your mix room. ARC can't do that for you ARC may correct it, but you still want to have the set up placed for optimal sound playback. You can also check different positioning, measure each one and select which sounds best for you.

I have several different readings for all conditions: door opened/closed, sub on/off, and combinations of both. Just click on the current setting and away you go. 

And +1 to Mike: I have my woofer sitting on the floor next to my workstation and when it is on it is obviously shaded left.

Thanks for all the input! I have purchased ARC 1 and was thinking about the upgrade to version 2 plus a sub - so this gives me much more to chew on. I will also eventually be building a better room for monitoring so this also helps me plan. Thanks again for the insite - that's what makes this fourm so useful :-) gs

Sure, let us know what you end up doing! Sub placement and all.

jamesyoyo


And +1 to Mike: I have my woofer sitting on the floor next to my workstation and when it is on it is obviously shaded left.

Me too. But, we're talking less than 18" off dead center of the room. 


Does that make my ARC 2 correction invalid?  Methinks not. But then I have no exact science to back it up so I'm sure that I'm wrong, right?