Thanks to you J M Fahey,
I've tried .............unfortunately it does not work.
Perhaps Alberto can give us a hand ?

Good luck, by the way, for your Chinese studies ?
Good wishes and regards

camelman 

Teemuk thank you very much for the details that you provided me. Actually I was wondering whether the 120 watt (GA-120) are in RMS on a single channel or in 2 times 60 on two channels. This amplifier has two inputs: a high and low, and I do not think I can plug into both inputs. Personally, I tried to push the amp at full power and although it sounds very strong, I do not think either of 120 watts. In this test of strength "overdrive" was not engaged.
By the way, do you have an email address where I can send my request to Roland, as I have already written the site address on "contact us" and I have not been answered yet.
Thanks again.

camelman

The two pictures shown above are the AG-60, here is the picture of the AG-120:

Happy Holidays to all,
I just bought a guitar amplifier, it is a ROLAND GA-120, which is in excellent condition. In fact, it resembles the JAZZ CHORUS 120, but with an equalizer, while the JC-120 does not. I am seeking information about this amplifier: technical specifications, user manual etc. ...
Does anyone know this amp?
I tried it yesterday and it sounds amazing! Really terrific, especially in clear and light tones.
Thank you for your help.
camelman