2.83 volts/1m vs 1w/1m

[87regal 0]

Is there a way to convert between the 2 rating so I can compare subs better.

[fritosaregood 0]

Subtract 3 db from the 2.83 volt/m rating and it equals 1w/m. Im about 95% sure

[todd.brust 29]

Nope, The rating will differ with different loads.

The output in watts with a 2.83V is going to differ with the resistance of the coil. With 1w/1m, it's always a single watt. When comparing a 8 ohm driver to a 4 ohm driver, the 4 ohm driver will get twice the power due to the lower resistance.

2.83 volts at 4 ohms will give you about 2 watts.

2.83 volts at 8 ohms will give you about 1 watt.

The 2.82 volt rating will make less efficient drivers at a lower load seem to be much more efficient when they are not.

As for an easy way to convert them, I cannot answer that question but I am sure some more knowledable people will have a bit more insight on that.

[NB50 206]

To calculate 1W/1M SPL = 112+10*LOG((9.64*10^(-10)*FS^3*VAS)/QES)

Vas = Liters

[todd.brust 29]

To calculate 1W/1M SPL = 112+10*LOG((9.64*10^(-10)*FS^3*VAS)/QES)

Vas = Liters

There's the answer you were looking for!

Thanks Bromo

[8adk1d 0]

Wow thats got me wondering about my Mach5 IXL 12"...I'm sure that driver is an exception, it will be quite good right?

[95Honda 486]

An easy way to figure it out is subract 3db for a 2.83V rating every time you halve impedance from 8 ohms...

So, if it is a 4 ohm sub, subtract 3db, a 2 ohm sub 6db, etc.... This is just a rough way to get the numbers, but it is usually pretty close.

An example is-

Sub X is rated at 90db 2.83V/1M. It has dual 4 ohm coils and the sensitivity is rated with the coils in parrellel (2 ohms). This sub is roughly 84db 1W/1M.