Hey all. i have a 94 Tremoverb. It's retubed completely with JJ tubes. Sounds KILLER but.....Recently i've been getting into more delays and i notice a huge change in the tone when i switch the knob on the back to the effects loop. This is even with only a short patch cable between the send and return. I have the send maxed but manipulating the levels makes no difference. There's a huge loss in bottom end and more harshness introduced. Is this a normal occurrence? I replaced all the tubes with the correct ones including the one for the loop.