The reverb tank went out on this amp so I replaced with a Ruby tank which has a much longer reverb decay time that is supposed to be useful for a "Surf Guitar" sound. For blues I keep it dialed way down to improve articulation. For a slower ballad or acoustic I sometimes turn it up a bit. It was very simple to swap out the tanks. I was considering adding both tanks with a switch to go between the two.
I have both a 520D and a 520DX. I recorded some videos comparing these two mics. The recording was done using an iPad 2 including the volume so I may have been able to capture better tone with a different recording set up. This first video was done using the 520DX microphone with built in volume knob.
The following video clip demonstrates the 520D green bullet mic from the late 80's early 90's. The end of this video includes a couple of ambient pieces done with long delay.
Blog out,
Plasma Portal
Hans Mikelson
