Originally Posted by xb243
I know it's a preference but just curious how much dB higher than the mains do you guys run your subs as compared to Audyssey receivers (if you had one) knowing Yamaha's low sub output?
Do you have an SPL meter?
Right after YPAO does its dance through all speakers/subs,
I go onto Setup>Manual>Configuration change all speakers to Small, 80Hz crossover.
Then go to Test Tone>On>Level and go to one speaker at a time (Master Volume around -15)
I make sure all speakers are putting out the same SPL from my MLP. (YPAO is close but not always prefect)
When I get to the sub channels I make sure they are putting out at least 10dB higher than the speakers.
But don't adjust the levels in the AVR over "0" to avoid clipping the signal, use the gain/volume knob on the subs.
For Dual Subs, Because the test tones calibrate each sub out separately, you also gain another +3dB naturally. (+6dB if subs are co-located)
The way our ears work, the lowest frequencies need to be significantly higher to be "felt", especially for movies with significant LFE/ULF content.
It's fine to have a Flat Frequency Response for Music, but most Bass Heads prefer to run a House Curve for movies.
Great read here on how our ears perceive bass, and why 30Hz frequencies need to be +8dB higher than 100Hz frequencies to be "felt" the same:
House curves were the running topic in the Movies with Bass thread on AVS over the past couple weeks now too:
If you want to get serious about Sub EQ, since YPAO does almost nothing to calibrate your sub(s)
(limited to 4 bands of EQ and nothing below 31.3Hz)
I strongly suggest spending ~$75 on a UMIK-1 mic and downloading REW (Room EQ Wizard)
to find out what YPAO is really
doing for your room. Moving your subs around and adding room treatments, bass traps
Will help you narrow down what you can do physically to get the most out of your space.
...But when it comes to making digital EQ corrections, an Antimode or MiniDSP is the superior solution.
(in addition to being the best way to calibrate and integrate multiple subs) YPAO does not calibrate the sub channels together,
So you may be getting cancellation (standing waves) creating a NUL at your MLP.
a ~$200 MiniDSP 2x4HD has 2 inputs, 4 outs (for up to Four individual sub outs)
each channel with its own delay/distance, levels, and 10 bands of EQ, accurate down to 10Hz)
More on REW, miniDSP and BEQ (Bass EQ) here: https://www.avsforum.com/forum/113-s...l#post56610134
Just raising your sub output levels won't guarantee you a "house curve" because that will also usually increase output around your crossover point.
Here's an example from my room taken from REW, but before putting the miniDSP in the chain to tame the peak ~70Hz.
You can digitally EQ out any peaks, but dips (aka Nuls) have to be fixed with different sub placement,
room treatments or by adding more subs to the room to even response across all seating positions.