This can indicate there is a failed diode / circuit in the receiver. You can have the receiver serviced but before going through that inconvenience try a couple things to minimize the problem. Adjust the gain control on the subwoofer in conjunction with the bass level control in the receiver.
Then, are Mackie Subs good?
Super clear, crisp highs, good bass response. It’s not “hit you in the chest” bass but that will come later when I add the Mackie sub to the system. It does sound amazing though and if you are using the speaker in a house, or garage, you’ll have enough bass without the sub.
Regarding this, can you use a powered subwoofer with a powered mixer? 1) EMX powered mixers have on their front panels a “MAIN” line output, generally both left and right. Connect the main out either left or right to the input of the self powered sub. Hint: if one main out is labeled mono, use that one.
Beside above, how do I connect my Mackie subwoofer?
How do I connect my subwoofer to Mackie mixer?
How do I connect my subwoofer to my Mackie speakers?
How do I know if my sub is blown?
How do I stop my subwoofer thump?
Is the Mackie Thump Bluetooth?
Thump Boosted speakers take versatility even further with a built-in 3-channel mixer that features two digitally controlled Vita+ preamps, plus a third Bluetooth channel for music streaming.