HEY! THIS IS MY FIRST POST.I'M PLAYING 30 YEARS AND BACK IN THE DAY I HAD TAURUS 1 PEDALS.NEEDING MONEY I SOLD THEM AND NOW OF COURSE REGRETTING IT.WHAT OCTAVE PEDAL CAN I USE THAT I CAN PLAY A LOW E NOTE SEND IT THROUGH THE MAINS HAVE IT TRACK PROPERLY AND NOT RUIN MY STAGE RIG? AND FEEL IT AN OCTAVE LOWER?I HAVE AN SVT 3 WITH A CREST SLAVE AMP A, SINGLE 15 AND A SINGLE 18 BOTH RUNNING FULL RANGE,BOTH AMPEG .I THOUGHT OF TAKING THE UNBALANCED OUT OF MY SVT AND PUTTING IT THROUGH THE MAINS BUT NOW I CANT HEAR IT.I TRIED THE MXR OCTAVE PEDAL AND IT'S NOT WHAT I'M LOOKING FOR.HELP!!