Determine How much power you need. Video! - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 5 Old 11-20-2019, 05:35 AM - Thread Starter
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Determine How much power you need. Video!

I just finished this video on determining how much power you need to hit your levels.

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post #2 of 5 Old 11-20-2019, 05:57 AM
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Good break down on power, thanks! You mentioned 80 being reference on the volume knob if you run Audyssey. Is that for sure because I run around 62-65 and I hit peaks of 100 or 105db sometimes on a decibel meter (though perhaps that is the bass, which I believe is supposed to be about 10db louder)?
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post #3 of 5 Old 11-20-2019, 06:48 AM - Thread Starter
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Quote:
Originally Posted by m0j0 View Post
Good break down on power, thanks! You mentioned 80 being reference on the volume knob if you run Audyssey. Is that for sure because I run around 62-65 and I hit peaks of 100 or 105db sometimes on a decibel meter (though perhaps that is the bass, which I believe is supposed to be about 10db louder)?
Thanks!

At reference it's nothing to have combined peaks over 120db. Remember reference is peaks of 105 for each loudspeaker and 115db on the LFE channel. When you use an SPL meter and just measure the sound in the room you're measuring every speaker in the room playing back the audio, not one specific channel.

For instance I'm about to release a video on mid bass slam and in the LFE alone I use RTA and measure peaks of 105db and I'm -10 db from reference. If I was using an SPL meter for overall system output I'd no doubt have peaks approaching 115db.

As for 80 being reference (or 0 depending on the volume scale used) it should be reference after auto setup but it's good to always confirm manually. I'll be doing a video on that soon.
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Last edited by cdy2179; 11-20-2019 at 06:51 AM.
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post #4 of 5 Old 11-20-2019, 08:16 AM
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It's easier to use some digital analyzer to determine True Peak levels in file(s) and then calculate voltage swing from that using gains and voltage levels of your equipment. Acoustical measurements in room are unreliable for that.
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post #5 of 5 Old 11-20-2019, 11:00 AM - Thread Starter
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It's easier to use some digital analyzer to determine True Peak levels in file(s) and then calculate voltage swing from that using gains and voltage levels of your equipment. Acoustical measurements in room are unreliable for that.
I know. It's good enough to get a ballpark though. The channels goal is to keep things as simple as possible so the average guy can get a grasp on setup and general understanding that's far better than anything else I've found on youtube.
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