Hi Geoffkait, Do you really believe that fuses would be directional?, I will need four of the SR Reds to go into my krell 700cx, the reply from krell when I asked them about these fuses being directional,quote, you read to much into this, it does not matter which way the fuses go in your amp, end quote, However, I would like to know how I can decide which way the fuses set inside my amplifier to sound best?, It is my opinion that the manufacturer does not know everything concerning fuses after that reply to me, are do you think that they are correct concerning their product?