I recently got a markbass f1 and I'm having a bit of a problem with it. I love the sound and how small it is but every now and then it just shuts off. I'm not sure if it a power issue or if i got a lemon. I'm inning it through an older Eden 4x10 ( no ports, white logo ). The cab is 500 watts and 8 ohms. The head is supposed to run at 300 watts at 8 ohms and 500 watts at 4ohms. Could it be the pairing? Any help would be awesome!