[NyanNyanNyan]

That's odd.

Bad battery? Did you try to switch from 3 tube to 2 tube mode and back to see if the switch somehow isn't fully engaged?

No. Turn off the power normally and switch mod.

 

[Daniel Johnston]

No. Turn off the power normally and switch mod.

I'd toggle the mode switch personally. There shouldn't be a difference between plugged in or on battery when it comes to tubes used. Make sure you are using the included power supply. Anything else may cause weird behavior. I found that out.

I'd also email Woo audio.

 

[NyanNyanNyan]

Thank you, and I'll ask the official import dealer

I'd toggle the mode switch personally. There shouldn't be a difference between plugged in or on battery when it comes to tubes used. Make sure you are using the included power supply. Anything else may cause weird behavior. I found that out.

I'd also email Woo audio.