RE: Anechoically flat....

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Posted by das@soundstage.com on May 4, 2012 at 15:46:26

In Reply to: Anechoically flat.... posted by morricab on May 4, 2012 at 06:54:34:

Hi,

Since we're the only publication in the world that does true anechoic measurements (that I know of), I know a thing or two about this.

Your statement is too vague. When you look at any frequency-response measurement, you must look at curves taken on and off axis, and then summed curves (front hemisphere, sound power, etc.) as well.

When you say a flat anechoic curve will sound too lean and the balance should be tilted down, that relates to the sound power mostly. Basically, sound power takes into account all radiated energy (front, sides, rear, up, down), and when you look at that in a properly balanced, neutral speaker, you'll have a downward-tilting line -- and it is quite possible that the on-axis response is very flat with no tilt. A good example of that is the PSB Imagine T2 that I just reviewed. The reason you get this downward tilt is because when you get off axis, the energy in the highs decreases more than the bass. When you sum all that, you'll have less energy up top than down low.

It's when you have flat sound power that you have a lean, tilted-up sound. If you look at the on-axis response of that, you won't likely see a horizontal line, but one that rises significantly from the bass through the highs.

Hopefully that makes sense. Our measurements can all be found at www.SpeakerMeasurements.com. These are all performed in the anechoic chamber at Canada's National Research Council (NRC).

Doug Schneider
www.SoundStageNetwork.com

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Follow Ups Full Thread

Topic - Hi end speakers tonal balance - chlim 03:49:17 05/03/12 (20)

RE: Hi end speakers tonal balance - RGA 00:20:34 05/12/12 (0)

RE: Hi end speakers tonal balance - 3db 04:14:56 05/10/12 (0)

RE: Hi end speakers tonal balance - tmsorosk 05:04:48 05/07/12 (0)

Anechoically flat.... - morricab 06:54:34 05/04/12 (4)

RE: Anechoically flat.... - das@soundstage.com 15:46:26 05/04/12 (3)

RE: Anechoically flat.... - morricab 02:41:43 05/07/12 (2)

RE: Anechoically flat.... - das@soundstage.com 04:16:53 05/08/12 (1)

RE: Anechoically flat.... - RGA 23:20:12 05/11/12 (0)

Read Robert E. Greene's essay in TAS April 2012 issue, p. 14 - hesson11 16:37:17 05/03/12 (2)

Another factor.... - Salectric 12:34:51 05/06/12 (0)

RE: Excellent essay in TAS April 2012 issue, p. 14 - layman 08:33:41 05/04/12 (0)

RE: Hi end speakers tonal balance - Justlisten2 16:19:58 05/03/12 (1)

RE: Hi end speakers tonal balance - Presto 10:34:48 05/04/12 (0)

no cochlea for old men - DrChaos 15:42:39 05/03/12 (1)

Bravo.....I can relate to that. * - mr grits 16:32:24 05/03/12 (0)

High end trend - Larry I 13:30:13 05/03/12 (1)

RE: High end trend - 3db 04:53:33 05/09/12 (0)

I think it depends... - mkuller 11:34:13 05/03/12 (0)

Contrary to popular belief... - Presto 09:39:15 05/03/12 (0)

RE: Hi end speakers tonal balance - tomservo 06:02:09 05/03/12 (0)

Follow Ups

RE: Anechoically flat.... - das@soundstage.com 15:46:26 05/04/12 (3)

RE: Anechoically flat.... - morricab 02:41:43 05/07/12 (2)

RE: Anechoically flat.... - das@soundstage.com 04:16:53 05/08/12 (1)

RE: Anechoically flat.... - RGA 23:20:12 05/11/12 (0)

RE: Anechoically flat....

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