Goodrich active optical volume pedal (LDR2) $230 shipped
top of the line volume pedal, absolutely no loss of tone when lowering the volume
blurb I swiped from online shop:
"This pedal has selective inputs - Plug into NORMAL mode or BRIGHT mode. It also has 2 outputs for driving 2 amps or you can use 1 output to go directly to a mixing board or tuner. This pedal has No Pot, No Battery, No Racks or Pinions and No Moving Parts. It is a product of modern technology. It is extremely quiet and free of distortion. This noiseless, no-loss, distortion free operation requires more power than a battery can provide so it comes with a plug-in power supply. The Goodrich LDR2 has more headroom than any other pedal with no clipping regardless of how hard a string is picked.
There is No Tonal Change from Full On to Full Off regardless of which input is used.
This pedal also includes R.F., Filtering so that you won't hear cell phones or intercoms. This pedal has an adjustable tensioning device that maintains the setting when your foot is removed from the pedal."
They don't make these any more and they can be hard to find, so here's your chance if you've been looking for one