let me make sure I have this right?

[539465]

1mW @ impedance = dB(sensitivity)/mW -> (is this max dB or average or median or something???)
10xmW(10mW) = dB +2dB
^10xmW(100mW) = dB +2dB +2dB
etc


????

am I dumb or smart?

 

[Armaegis]

Here's a calculator for you:
http://www.sengpielaudio.com/calculator-amplification.htm

As a general rule, doubling of power gives you a +3 dB, and a x10 of power gives you +10dB

If you quadruple the power (ie: double the double), that's only +6 dB

Speaker sensitivity ratings are generally given at 1W output and measured at 1m. Headphones are a little different and there's an assumed driver to ear distance based on the cup design. Both ratings are typically given at 1kHz, although you may chart out a more complex output with a graph.

 

[539465]

Here's a calculator for you:
http://www.sengpielaudio.com/calculator-amplification.htm

As a general rule, doubling of power gives you a +3 dB, and a x10 of power gives you +10dB

If you quadruple the power (ie: double the double), that's only +6 dB

Speaker sensitivity ratings are generally given at 1W output and measured at 1m. Headphones are a little different and there's an assumed driver to ear distance based on the cup design. Both ratings are typically given at 1kHz, although you may chart out a more complex output with a graph.

I am sooo bad with the volts to watts at ohms I will be honest I have no idea how this works but this makes sense and makes me feel a lot better, but basically my 600mW BasX vs my ~250W Magni 3 would be giving me in the range of 3.6dB more only!

But that is good since my new portable amp just needs 1mW @ 600ohm to goto like 96dB which is already high enough and 8 2-> 99 then 4-> 102 which is starting to get loud it probably has well over that so I should be good , thank you for the explanation however