New PSW505 extreme static

Just bought a PSW505 (yes I know it is an older model but it is new in the box). I followed all installation guidelines. As soon as I put power to it there was an extreme static sound. And when I say EXTREME I mean unusable. I adjusted EVERYTHING in an effort to stop the noise to no avail. I replaced a really old 150W Sony Sub hooked up exactly the same to the same equipment and never had the slightest hum, crackle, or static. PLEASE tell me someone has a solution! Thank you!!! Oh yea, it's LFE.

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