I HAVE THE TF IN THE LOOP RIGHT NOW, HOWEVER THERE IS A BIG VOLUME DROP AND A MAJOR TONE CHANGE. IS THRE A WAY TO CORECT THAT . IM IN A MARSHALL JVM. I HAVE READ THAT THE FX LOOP IS NOT SO HOT WITH THIS AMP. WOULD I LOSE MUCH BY USING THE FRONT OF THE AMP.
TFactor has 2 switches for input and output level matching. FX Loops (if designed correctly) should work at +4dB line level, requiring you to set the 2 switches on LINE. The other position (Guitar/Amp) are to be used when the pedal is connected between guitar and amp front input.
Try changing the impedance switches and let us know….