Originally Posted by Nyal Mellor
What is reference level? http://www.acousticfrontiers.com/201...ference-level/
. It's not all speakers on, its a single speaker measurement with a test tone at -20dBFS which creates a resulting pink noise of 85dBC at the listening position. We did level set off the Dolby Atmos test disc, but AFAIK
I used A weighting which I always do, so will be slightly off (maybe 3-4dB) if you use C weighting. You could run the level set test tone at 0dB on the receiver with C weighting on a good SPL meter (not an iPhone), and then tweak the levels on the Xilica or Yamaha so 0dB = 85dBC.
From memory the bass in your room is at least 8dB hot
If there's no vibrations at your usual listening level then no need to change it IMO, just creating work for yourself.
Hey Nyal! Hope you're doing well.
It's funny, whenever I look for information on audio, your articles pop up. I'm like, hey I know that guy! I had actually read that article a couple times. You've written a lot of really good information for everyone's benefit. I really appreciate it and I'm sure others do as well!
Even though I love to run my theater far hotter than most, when I turn the volume knob on the Yamaha to 0dB, it's absolutely insane. Like crazy insane! When I hear people on AVS talking about "reference" listening, their descriptions don't seem to match anything close to what my theater is doing at 0db!
I read some other material as well, which may not be accurate. That information talked about "reference" volume typically having 105 dB peaks. Mine is FAR above that. Would there also be a "reference" guideline for peak values for what the entire theater is doing in dB?
On my projector, that's good advice as always. However, if "reference" which people here on AVS refer to is really at my 0dB on the volume knob, I may want to go through the effort. If it's not, I will leave it be.
Originally Posted by Nyal Mellor
I always use A weighting for level balancing speakers because it gives a better result than C weighting, as you point out. However, it was an intense 2 days of calibration. I can't recall if I calibrated the 0dB on the receiver volume control so that it would be "THX Reference" (single speaker 85dB continuous dBC with a -20dBFS test tone).
, if you'd like to set that up I can tell you how to do it.
I appreciate that offer. Thank you. You did a great job calibrating my theater. Since you left, I can now clearly hear the rears and ceiling speakers. The bass was great before, but SO much better now. The range is much improved as well and way more balanced. I'm REALLY enjoying it...like big time. It is so clear and dynamic. Just incredible! Calibration was certainly worth doing.
It's lots of fun to demo. The most common comment I get from people is "OMG, I've never heard anything like that" or "I didn't know a theater could do that". It's even more fun to just sit and enjoy all the efforts which went into building it!
I never asked you to set "reference" to 0dB as part of the calibration when you were here. I had too many other more important requests, including multiple profiles. You spent all day here, both days. Still, it's nice for you to offer to help me set it after. I don't think I need that though. My only curiosity is to know at what volume level on the Yamaha gets me the "reference" level people here on AVS refer to when they listen to movies. Without doing anymore calibrating, what's the best way to determine the appropriate volume level for "reference"?
I agree about the iPhone, but it's the only tool I have. Is there a good dB meter I can get easily, say from Amazon, without breaking the bank?