carlaz wrote:n2mpujack wrote:The Brit 9000 has a Hi/Lo Power Level rocker right next to the Power switch on the lower left of the amp gui. I kno0w some guitarists would pull the outer two tubes to get down to 50 watt output.
Ah, but I believe that the JCM 900 actually had an "Output Mode Switch" on the back panel that switched between "HIGH" (full power) and "LOW" (half power). I think the "Hi/Lo" switch on the Brit 9000 model's main (and only) panel is intended to model this switch on the physical JCM 900 back panel. But possibly not all production versions of the JCM 900 had this "Output Mode Switch" on the back panel? I don't know!
The Marshall book I have doesn't mention a output mode switch on the back panel and the pictures I can find online don't show one. They DO show a hi/lo level control for the loop. This is for the heads. The combos DO have a lo/hi mode switch for the power output along with an 8/16 ohm impedance switch. So it depends on which exact 900 model is being modeled here.