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Re: Power requirements for various channels
jakewash #386826 12/11/12 04:05 AM
Joined: Jan 2012
Posts: 90
old hand
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old hand
Joined: Jan 2012
Posts: 90
Originally Posted By: jakewash
AHH, but even in stereo the demands on the left and right channels are virtually never the same, so not technically all channels driven, very close but not exactly the same. If it was in 7 channel mono then you have the same demands on all channels driven.

True; the "all channel driven" spec makes no difference. I was getting confused with something else.


M80 v3, 2 x Emotiva UPA-1 Monoblocks, XPA-5, UMC-1 PrePro
Pro-Ject RPM Genie, Carver C2 Phono Preamp
Re: Power requirements for various channels
AdrianD #386828 12/11/12 04:40 AM
Joined: May 2002
Posts: 10,654
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shareholder in the making
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Jason and Adrian, it can also be pointed out that selecting an "all channel" mode(even all channel mono)doesn't in itself create additional power requirements. When more than one sound source is playing simultaneously, the sound power level is increased by 3dB for each doubling of the number of sources(1 to 2 speakers, 2 to 4, etc.). This relationship is illustrated here .

The bottom line is that to keep the same overall sound level with, for example, 4 speakers rather than 2, each speaker would require only half, i.e., 3dB less, power, so no more total power is used with 4 rather than 2 speakers playing simultaneously. If the total sound level was to be increased, of course more power would be used, but this would also be the result if only one speaker was used to create the higher sound level.


-----------------------------------

Enjoy the music, not the equipment.


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