Hello, I have a GK 700rb head and 3 NEO cabinets, 112,115 & 410. I connect them with speakon cables and have the cabinet's switch set to bi-amp mode. I don't get much sound out of the tweeters, I can turn down the woofer level all the way down and crank the tweeter all the way up, I barely hear any sound. I wonder if I am missing anything about how this is supposed to work or if my amp head may need to be repaired. Thanks in advance for your feedback.