Awesome amp.  I am really happy with the results.  This is my final product for my system.   
We are using the amp now and we are extremely happy with it.  
Thank you for your awesome design and I will recommend your kits for anyone else that wants this quality product.  

This amp simply kicks ass sonically and i look forward to recommending your products.  
thanks for the good after sale bedside manner for dopes like me.   Mike

All-in-all, I am pleased with how your circuits perform and would not hesitate to purchase other kits from you. 
Your technical support when I had a problem has also been excellent. 
I do not know how much positive feedback you receive, but I thought I would let you know we are happy 
with your circuits. My wife said this is the best sounding system we have had so far. 
Best regards,   Ralph 

"I finished your mod and this is honest to god the first time I ever enjoyed listening to an MK3..
The MK3 has always sounded kind of sloppy, but this mod tightened it up and the overall 
tonal balance is much much much better.  The biggest thing I noticed was the linearity of the sound 
and the focus of the instruments possess an exponential difference now as opposed to the stock MK3.
The amp is tighter and much faster."

Now for the sound. Let's just say I used the board on a few Dynaco's and I was happy with the results as compared 
to other mod boards and stock boards I tried. But when I put the boards in it took on a new life form. 
Dynamics in spades. Musical? None better! This is the best mod to a Dynaco amp I ever heard. 
The music is about as real as it gets with lifelike images that make you feel the musicians and singers are in the room 
for a personal performance just for the listener. 
The bass is extremely accurate and tight. I felt it was a bit bloated on the original Dynaco. 
Try this board! You will be glad you did and it is easy to install.