WHAMMY PCB

Building and finishing the case was much harder the building the electronics. Easy to build for even a novice like mem using the standard bill of materials. Worked first time with no noise at all, even at full volume. Upgraded the op-amp already, with impressive results. Drives my Audeze LCD-X very well. I am really very happy with my decision to build this and the sound quality of the final result. The case it not too bad either!

The PCB from DIY audiostore is well designed and of good quality. The layout is exactly according to the published schematic. I just have one suggestion: the decoupling caps are between the pot and the opamp. In my builds I put them directly at the input. Otherwise the pot will probably generate a scratching noise if there is DC at the input. For the next order of PCB‘s in my opinion it is worth thinking about changing the layout.
I added the Khadas Tone Board DAC to my build. So I have an excellent DAC/headamp in a small chassis.

This is the second Whammy I have constructed the first having been enjoyed by me for quite a while, this time I decided to "up the game" a little by adding a Burson Audio discrete opamp in place of the usual suspects. The quality of the circuit boards never fails to impress, heavy plating, high quality printing and a very good finish. Construction was without drama and all worked first time, though for the purpose of initial testing I used a generic "cheap" opamp when everything checked out OK then this was replaced with a Burson Audio V6 Classic. Amazing, no other word for it. The audio quality just goes to show the basic design is very good indeed, I am sure it performs as well if not better than anything "off the shelf" both in its own price braket and at a considerably more expensive level. As time goes on I am sure it will continue to improve as things "Burn in" .
This is a great project for anyone to tackle, you won't be dissapointed with the results I am sure, it is easily achieveable with modertate skill level and some patience.

I am completely satisfied with the product. The rendering is above my expectations.
Sincerely
Alain Billard