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I own the B&K Reference 30 preamp and it was recomended by their tech support that I use the tones in the preamp to set my speaker volume levels. Now when I put in either the Video Essentials disc or the AVIA disc the tones are much softer at volume levels I usually use to listen to movies (-15dB on Preamp).My question is, is it best to use the tones from the preamp to set speaker levels or would the tones off the AVIA or Video Essentials disc be a better choice? Also, if I do use either of the above discs I wuold need to turn the volume level way up to get 75dB out of my meter. Any help here would be appreciated.
KM
Ognam1@aol.com
Follow Ups:
KM,A couple of things you need to realize.
1) Tones inside the Ref 30 are fixed level.
2) AVIA and Video Essentials assume volume setting is 0.0dB on your processor at playback to calibrate levels.
I can clarify even more if you'd like.
Regards,
That makes sense. Originally, what I did was to set all speakers to 0.0 dB within the individual settings for each. Set the meter up, and moved each individual setting up or down as needed until I leveled off at 74dB on the SPL meter (each speaker is within +/- .5 dBof each other). That is accept for the sub which, even with meter set on slow, bounces around between 73 - 75dB (average around 74.3). (I do have a little weaker bass response on the far left side of my viewing area so run the bass little higher).I normally watch movies at -15 dB on my Ref 30 and I would assume, based on what you said, that if I ran the Video Essentials or Avia disks at 0.0 dB on my Ref 30 the readings on my SPL meter would probably approximate what I have already found. That is why, when I run these disks at a normal listing level the test tones seem soft. Thanks for your response. Any other info would be welcomed.
KM
KM,Correctly set for reference level, you need to set to 75dB ;-) I think 74 will work just fine!
AVIA is recorded at -20dBFS (20dB below full scale signal) so 85dB with volume at 0.0dB is what you should get. VE is recorded at -30dBFS so 75dB is what you should get. The LFE channel has 10dB extra on it. Both discs account for this and attenuate by 10dB so that the subwoofer ends up at the same level as the other speakers.
Assuming you're using the Radio Shack SPL meter, you should calibrate the subwoofer 2 to 3 dB below the other speakers, as this meter is inaccurate at both frequency exteremes.
Regards,
I use the Ref 30, it's a good pre/pro.
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