[VincentH]

HI, I have EM7 but do not know if it's 2.5 watts or 5 watts. There is no model number on it. Is there a way to check it ? Thanks

[Ericus Rex]

I think it goes as follows:  If you can adjust the bias yourself it's a 5 watter, if it is self-bias then it's a 2.5er.  If I'm wrong I'm sure someone will let us know.

[skite30]

You are correct about the bias adjustment, when I open mine up the transformers have 5 watt written on top of them also. Bias is easy to adjust but mine need it done every couple of weeks.