Question about O2 amplifier...

[LegionOfHell]

I have an O2 amplifier and I have some questions:

- Is the standard gain(2.5x , 6.5x) the highest gain possible with O2 ?
- how do I know if my O2 is set to the standard gain without looking at the PCB ?

 

[staticV3]

- how do I know if my O2 is set to the standard gain without looking at the PCB ?

Input a 60Hz sine wave of known amplitude into the O2 and use a basic multimeter to measure the voltage at the output with volume turned up all the way.

The gain in dB is 20*log10(output voltage/input voltage).

 

[DVDdoug]

You can create a tone-file with Audacity.

Note that some multimeters are not good for low AC voltages so make sure it has a low AC range (in the ballpark of 1V).