Glad to help. MIT 330 Shotguns have a shrink marker on the downstream side (that's the shorter RCA) this shmarker will read "low output", or medium, or high. If the input impedance of your YBA is 27k, then the ideal match is LOW, but if you were to get Medium, the performance difference would be only 2% to 3%.
Best of luck,
Joe
Best of luck,
Joe