2007年2月12日 · The test tone used for calibration in a receiver has an average level of -30 dB which means it is 30 dB below full scale digital (0dB). Not coincidentallly, the average level of the soundtrack of a movie on DVD is -31 dB. Playing that tone and calibrating so that the channel levels read 75 dB on the SPL meter gives you reference level (75+30=105).

2012年6月26日 · As a typical movie soundtrack has an average level of -30 dBFS and the receiver's test tones are also at that level, you want the SPL meter to show 75 dB: 75 + 30 = 105 dB = reference level. Keep in mind that a source with a much higher average level, for example CD, will be MUCH louder at the same volume setting.

2011年3月5日 · If the receiver has an auto setup routine that should be run first as it will attempt to get it right for you; if not, then you need an SPL meter set to slow response and 'C' weighting and the receiver's test tones. You adjust the levels of each channel until the meter reads 75 dB. You can't really do it accurately by ear alone.

2017年1月13日 · 75 db 1 meter (3.28 feet) is 72 db at main seat ear level. That means my peak is approximately 92 db at my ears in the main seat and 95 db at 1 meter from the speaker. My speakers 1 watt sensitivity is 91 db one channel driven. That means a lot since now I know I’m using basically 2 watts for 92 db peak at ear height 8.5 feet from one speaker.

2018年7月5日 · Hi, I have a question about how to properly set the subwoofer level in an AVR using Audyssey. When I set the volume knob on the sub to 1/2 and calibrate using Audyssey, the level ends up at -12 dB. 1. Why does it end up that low, is the subwoofer really that powerful in my specific listening...

2008年5月28日 · If you set the range to 70, when the pointer is at 0 the SPL is 70 dB. If the pointer is at +5 the SPL is 75 dB, etc. You aren't entering offsets to compensate. You adjust the channel levels until the meter reads your target SPL, which should be 75 dB if you are using the internal test tones of the receiver.

2021年4月6日 · I was just using the Umik as a SPL on REW. Ok a lot of videos and post same to level the speakers at 75 dB but don’t distinguish between a constant 75 or when it’s bouncing between 74.8-75.2. A lot of the videos and post also use a analog spl meter and never show a digital which bounces around a lot.

2008年1月9日 · So when the level of whatever you are playing is around -30 dB (average level of dialog in a movie), you'll hear 75 dB SPL. When that level increases, so will the SPL. When the level peaks (hits 0 dB) your output SPL will be 75+30 = 105 dB which is the definition of Dolby Reference Level.

2023年5月3日 · Ir only takes a speaker with low sensitivity of say, 85 dB/2.83V/m, 8 ohm nominal, 4 W to produce 85 dB at 4 meters, or 8 W for 91 dB. 85 dB for the calibration tone is 10 dB higher than Audyssey's, and I think Anthem should lower it to 75 dB, or 80 dB at the most, without sacrificing accuracy.

2011年7月4日 · I think from the listening position I level matched all my speakers to 75 db, and then when it came to the sub, I set it to 75 db average (because it jumps around a lot on the meter). I went to IMAX last night for the new Transformers and there is no way that the sub volume is level matched to the speaker volume.