Does the FX loop send a low impedance or a high impedance signal out of the "Send" jack?
I'm thinking of mic'ing my amp in a room off-stage which would require ~25ft of cable (each way) and I'm trying to figure out if I would need a buffer at the start of the "Send" to make it to my pedal board where my effects loop pedals would be ~25ft of cable away. One of the pedals in the loop has a buffer for the return 25ft trip back to the amp and I do have a buffer from my pedalboard before the amp input. I don't want to spend the money on the cables if I'm going to have to buy another buffer in order to make it work.
The setup looks like this...
Guitar => buffer => pedals => ~25ft cable => amp
FX loop send => (buffer needed?) => ~25ft cable => 2 pedals (one buffered) => ~25ft cable => FX loop return