Ok, a quick check on the net gives this method to check for crossover setting:
FINAL LEVEL ADJUSTMENT: One last time, adjust the subwoofer level to the
mains exactly as described in step #4 above. Now, use your Pre/Pro or Receiver
pink noise level calibration tones or one of the calibration discs, if that's what you
use, to lastly check the levels of all speakers and subwoofer.
There have been many comments about how the RS meter is not accurate in the
low frequency region, and is also said to differ from meter to meter.
Here is a possible method, using the RS meter, to adjust the subwoofer level to
that of the satellites.
Again, we're assuming that you have already calibrated your satellites to
the same level before this point in time, and we've done steps 1-5 of the
Set your Pre/Pro or Receiver mode to 5 STEREO and shut your subwoofer off.
Set your master volume to approximately -10 dB from reference, or, so that a test
tone (from your test tone disc) will read in the neighborhood of 80-90 dB.
Play an 80 Hz tone from your test tone disc (it should play through all 5 satellites
Note the reading.
Now, shut your satellites off and turn the subwoofer on and play the same tone
through your sub only.
Adjust the subwoofer level to the same reading that you got when playing just
A crossover only works correctly if the speakers being crossed over together play
exactly the same volume at the crossover point. In adjusting the subwoofer level
with this method, the accuracy of the RS meter becomes irrelevant because the
only thing that matters is that the subwoofer and the mains are at the same level
at 80 Hz (the crossover point).
The meter will read the same at 80 Hz every time. Whether or not it's an accurate
reading, it will level the sub to the mains at the crossover point by this method,
accurately. Since the satellites are already calibrated, the subwoofer will
automatically be exactly at that level at 80 Hz.
I have personally done this test many times and found the subwoofer level to be
within 1 dB of 75 dB (which is the level I calibrate to when using the Pre/Pro
calibration tones), and you can quickly check this method against your calibration
rumble tone method to see if it's of any value in your case. My opinion is that, if
this method is close the the rumble calibration tone, then keep the subwoofer
volume set to the level arrived at by the 80 Hz test tone method.
You can adjust the level of your subwoofer up or down for different source
playback, at will. There is no rule that dictates what level you have to play a
subwoofer at. BUT, you now have the correct settings that will tell you where your
subwoofer should be, in your room, with your associated hardware, as a
It's a good idea to write these settings down (Pre/Pro or Receiver sub level,
phase, placement position and subwoofer amplifier gain), as you'll forget them
shortly after you change any of them, and it's a good idea to reset them to these
reference settings every so often to see what havoc you may have wrought over
You are now ready to play your system and evaluate the results of your setup
Going to try this out now....
I want to hear opinions from people who don't have a dog in the fight.