Hey\nI just bought this tuner. It's works good, almost...\nSo for some reason i don't get any audio out from subwoofer preout. I tried literally all settings, but nothing. I double checked subwoofer, and it's works. \nSubwoofer is "home made". I've used it on my stereo kit, which not offered sub out. Basicly I connected positive and negative to the speakers out.\nI don't know what I do wrong. \n\nThank you for helping.