Originally Posted by craig john
You would be far better off following the setup guide I linked previously than this flawed technique you found by Googling. The setup guide I linked has been verified by Chris Kyriakakis, the Chief Technical Officer of Audyssey. You can't get more authoritative than the guy who *wrote* the Audyssey program.
Just my 2 cents. No offense, Craig! I'm just trying to help shine some lights in the management of multiple subs (also applies to single sub) especially to those who do not own SPL meters. In fact, Chris cautioned readers in the use of SPL meters (except the expensive professional meters--from your link) because of their inaccuracy. It's just another way to skin a cat. Here's what Chris Kyriakakis stated which is not very different from the tip above that I found from another site. Thanks.
Ask Audyssey>Audyssey 101
Subwoofer setup and MultEQ
Chris Kyriakakis November 05, 2009
Many powered subwoofers have controls that are set manually. It's important to follow some simple guidelines to avoid having these controls interfere with proper subwoofer calibration and integration with the satellite speakers.
If the subwoofer provides a direct input (sometimes called LFE input) then it should always be used. That input bypasses the filters in the subwoofer and allows the bass management system in the AV Receiver to operate properly
If there is no direct input, then the lowpass filter knob on the subwoofer should be permanently set to the highest frequency it allows. That way it will not interfere with the MultEQ measurements and bass management
The level control on the subwoofer is often set too high. This can cause the AV Receiver to run out of level correction range when MultEQ tries to set the subwoofer to reference level. Set the subwoofer level control to the midpoint. If MultEQ reports high negative trims (e.g., –12 dB) for the subwoofer, then you should turn the level control further down and run MultEQ again
If there is a Phase control on the sub it should be set to 0°
If you have a subwoofer with room EQ, then you should run that first in the subwoofer and then run MultEQ in the AVR
If you have an external subwoofer processor (such as the SVS AS-EQ1 or the Audyssey Sub Equalizer) you should run the calibration in that processor first and then run MultEQ in your AVR
If you have two subwoofers, there are some additional steps to take:
Place them at equal distances from the main listening position
Set the level controls on the back so they both play at the same level
Connect a y-cord to the sub out of the AVR and then connect to both subs
Turn off processing in the subs as it will not be able to give you the same resolution that you will get from MultEQ (thousands of points vs. a few parametric bands)Edited by beat1 - 2/18/13 at 9:22pm