I just got the first of my two b1800d pro subs in today (don't ask why they set them separately) and it got it's first tests today. Now I believe I'm the first on the web to review these so I'm going to try and do my best. I bought these each for 475$ from samedaymusic and behringer was and is late on their shipments but I was lucky enough to have ordered mid nov. The speaker is heavier then I thought at 120pounds and does require a set of castor wheels if your moving alone often. I just bought mine tonight and will create a video for YouTube reviewing and installing the castors. The sub was tested at my dads warehouse where I could pump out the volume along with my 2 15" eons and it really brought out the lows. The speaker pumps harder than most I've heard and I'm sure with the second speaker there it will blow any other 18" out the water such as the jbls or qsc and for less money. It is a very deep and clear sub. The limiters on the back make it nice to find the right frequencies and tune your volume. I need to get the satellite polls but placed In the right part of the room this speaker is amazing. I really liked my friends 15" 2 way powered behringers and hence my purchase of these. I don't think I could be happier and can't wait to get my video on you tube for all of you. Let me crush any bad roumers as I am the first to test these and review on them. For the price you can buy 2 for the cost of one qsc and pull nearly twice the power. I will rate them at 8.6/10 with the qsc at 9.8/10 in sound quality. For the price I give it a full 10/10. The construction is extremely rugged and tough the speaker grills strong and handles well built. Save money and add to your system. Go for the behringer b1800d pros baby