Hi guys,

I am a newbie in electronics, must confess, but love to learn and practice.

That was the reason to buy a A10 and use the great generosity of Stheve to modify it and have a better sound companion.

I believe that did it all right - please have a look on the picture attached - but after watching all the videos more than two times I couldn't figure out why my amp, despite playing, sounds very, very low - at a level that is almost impossible to listen anything.

I am clueless and would love some of your help/guidance to troubleshoot it. My speakers have a sensitivity of 88dB, so they are not the most efficient but the A10 should be able to drive them. I also used the pins for the 6N2 instead of changing them for the 12AX7.

In addition, how can I test my tubes in order to make sure they are working?

Thank you so much and my best wishes to you all.

Alex.