So, I wanted to actually even a little feedback (Test) Add to my purchased in recent months components. At the time I bought the Sub purely experimental reasons in addition to my 7.1 system, A: I wanted my 40 square meters large room, better stimulate B: I wanted to get a Dröhnfrequenz at 50 Hz under control. One thing - I'm not a high-Ender, I have neither Electronics for 10,000 euros, even for Ls 30,000 euros are here. And yet, I think so, I now know what sounds good, what too much and what is too little available. ----- The small sub is very punchy for size, he plays clean, precise and has no known favorite frequency, of course, he can not brute volume, but for a market price of about 85 euros which offered performance is outstanding, and processing technology is the TOP small. I've separated it to the AVR at 60 HZ, he is now playing with me from 30Hz with full pressure .Since I already had multiple subwoofers, heard (300-600 euros) I can not fault report to the Sub. I wonder how seriously Yamaha because what can still earn it. Now a small tip. One should not make the volume knob higher than 2:30, or it may be the emergence NOISE at high volume in the deep bass range, besides he has neither phase switch nor a controller for frequency adjustment, somewhere had to be saved halt.