I was skeptical at first because dieverser reviews on this sub. I have the subwoofer now almost a year in operation, and must say that was the best decision I could make. The subwoofer brings exactly what I wanted to achieve. A clean support of Basfundamentes without annoying to play in the foreground. But he may loose if it is necessary to unleash an earthquake without distorting this as one often hears of cheap models or how it happened quickly for small models simply because too little diaphragm surface is present.
Flow noise I could as yet no account and no humming noise. So just a fine "inconspicuous" subwoofer, but the one notices when it is necessary! Film sound like in the cinema.