We built this amp for Chris S. who wanted the Robben Ford "Talk to Your Daughter" tone. It's a copy of the amp circuit Robben used on that album, but with a built-in D-style FX loop and spring reverb. The OD, PAB, reverb, and FX loop are all foot-switchable with LED indication.
We also added a power amp resonance control for a bigger low-volume sound, as well as a pentode/ultralinear switch (custom output transformer)