1m/1w and 1m/2.83V

[leonm12 10+ year member]

Hello,

I am using the termpro in order to calculate speakers boxes.

I see that the termpro SPL is in 1m/1w value.

my speakers is in 1m/2.83v...//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

can someone expline?

Click to read more...

 

[ultimate157 5,000+ posts]

I'm guessing the speaker was measured with the coils in series at an 8 ohm load... 1 w through an 8 ohm resistance is 2.83v

1w/1m is the standard because you can put 1w of power through 4 different resistances and achieve 4 different voltage levels.

 

[leonm12 10+ year member]

the speakers is 4 ohm - Herz Mille ML1600 woffer.

I don't know which value I should enter on the termpro..

how to compare between 1m/1v value to 1m/2.83v??

Thanks

 

[ultimate157 5,000+ posts]

2.83v/1m = 2w/1m for a 4 ohm resistance

You can't simply halve the value to figure the 1w/1m value because the scale is logarithmic.

 

[leonm12 10+ year member]

thank you very much for the help.

I am not very familiar with these terms.

this is my speaker details:

Impedance Ω 4

Spl (1m/2,83V) dB 93

which SPL value I should enter in the termpro for that speaker?

 

[ultimate157 5,000+ posts]

90db

Twice the power is ~3db increase.

 

[leonm12 10+ year member]

Thanks!!!