XPA-1 Volume in class A

[dubs]

What is anyone's guess as to the max volume of XPA-1s in class A mode with 92db speakers ?  1 to 100. Thanks

[garbulky]

XPA-1 does 10 watts in class A per channel.
There are speaker volume calculators you can use online. However, note that theory isn't the same as practise and volume/loudness diminishes the further away you are from the speaker.

[Deleted]

Okay, my guess is they're 92 db at a listening distance of 8 feet...

-RW-

[AudioHTIT]

My math would be something like:
{92 dB with 1 Watt @ 1 Meter} + {10 dB for 10 Watts Class A} = {102dB @ 1 Meter}
{102dB @ 1 Meter} - {6 dB @ 2 Meters} = {96 dB @ 2 Meters} (etc.)

Though that's all theoretical with a point source driver in open air conditions, a line source would be 3 dB louder. In real world room conditions it will be different, but that's a start.

[deltadube]

Aug 5, 2013 21:03:30 GMT -5 AudioHTIT said:

My math would be something like:
{92 dB with 1 Watt @ 1 Meter} + {10 dB for 10 Watts Class A} = {102dB @ 1 Meter}
{102dB @ 1 Meter} - {6 dB @ 2 Meters} = {96 dB @ 2 Meters} (etc.)

Though that's all theoretical with a point source driver in open air conditions, a line source would be 3 dB louder. In real world room conditions it will be different, but that's a start.

i cant hear a difference in the sound quality myself..

so at 4 meters be 90 db ?

cheers

[AudioHTIT]

Aug 5, 2013 22:35:33 GMT -5 deltadube said:

Aug 5, 2013 21:03:30 GMT -5 AudioHTIT said:

My math would be something like:
{92 dB with 1 Watt @ 1 Meter} + {10 dB for 10 Watts Class A} = {102dB @ 1 Meter}
{102dB @ 1 Meter} - {6 dB @ 2 Meters} = {96 dB @ 2 Meters} (etc.)

Though that's all theoretical with a point source driver in open air conditions, a line source would be 3 dB louder. In real world room conditions it will be different, but that's a start.

i cant hear a difference in the sound quality myself..

so at 4 meters be 90 db ?

cheers

Yes, in open air a point source (spherical wavefront) will dissipate 6 dB when the distance is doubled.

[deltadube]

Aug 6, 2013 11:19:10 GMT -5 AudioHTIT said:

Aug 5, 2013 22:35:33 GMT -5 deltadube said:

i cant hear a difference in the sound quality myself..

so at 4 meters be 90 db ?

cheers

Yes, in open air a point source (spherical wavefront) will dissipate 6 dB when the distance is doubled.

Hi Audiohtit !

i was thinking late last night about what you wrote for the calculation of db..

i believe i read cant remember where that when in stereo mode with 2 speakers firing the sound you have to

add 3 db to to figures so 93 db for 4 meters.. ?

cheers

[AudioHTIT]

Yup, you got it, a second speaker would be doubling the power.

[audionut78]

I like the sound of that first 35 watts of Class A power through my Cornwall III's

[dingdong]

With this calculator you can check it by setting your desired level, distance from source in meters and the sensitivity rating of your loudspeakers. Obviously let your sensitivity rating and distance be constant while changing the desired level and or headroom until you reach the class A output in watts in the required amplifier power field. You can also change your distance from the speakers, but that would obviously mean that you need to move your speakers or sofa around.

www.crownaudio.com/elect-pwr-req.htm

For instance, at 3 meters distance from the speakers, with a sensitivity of 92dB 1W/1M and desired headroom of 3dB and a desired level at that distance of 96dB, the required power is 45watts. At 97dB desired, you need 57 watts with the same settings.

[audionut78]

HOW ARE YOU ABLE TO LIST ALL OF YOUR EQUIPMENT YOU USE IN YOUR POST. THANKS

[garbulky]

Oct 14, 2013 21:00:38 GMT -5 audionut78 said:

HOW ARE YOU ABLE TO LIST ALL OF YOUR EQUIPMENT YOU USE IN YOUR POST. THANKS

Click
Profile->Edit profile->Personal->Fill out "signature" box->Save personal settings.

[audionut78]

Thanks I would have never figured that out. I will need to update my list. I have two other systems that are old. Thanks again