Ok FINALLY got around to comparing the Yamaha dsr118w (18 inch PA sub) and the Behringer b1200d that I have sitting around for almost 2 months now. After using the Yamaha in my system for the past 2 months and very happy with the TR I was surprised at how good the B1200D performed. I have 4 PSA V1800s running on average at 2/3 gain and 6db hot in my avr so I like my bass hot. After getting my 4 main subs dialed in in the 4 corners of the room and running room correction (Anthem arc2),I daisy chained the mbm subs with my two rear subs. I ran both the Yamaha and b1200d in normal phase both integrate really well. When both are directly behind my seat, like within 3 inches I could not tell a lot of difference in terms of TR. I am not as sensitive to TR as others in this thread apparently but both can hit really hard when required and can have you lose your breath after a little while. I had the Yamaha at about 75% gain and I had to have the b1200d at 100% with boost on to level match and get similar TR. I have the Yamaha upside down on the floor to get the port at the middle of my back. The b1200d was right side up on a 20 inch stand and port was on about the same level as the Yamaha. The pros of the b1200d are that it is a lot cleaner/tighter even at high gain setting and doesn't add as much to the sound while giving good TR compared to the yamaha. The pros of the Yamaha are that it is just larger so it vibrates more of the back of the chair but it also penetrates through the chair better, and vibrates the bottom of the chair better - when the action in a movie is right in front of me vibrating the bottom of the chair as well as the back is a more authentic reaction than just the back of the chair alone. The other pro and the reason I will be keeping the yamaha over the B1200D is that i can't have the mbm right behind my seat because I like to recline my seat, so it has to move about 8 inches back. Doesn't sound like much but the B1200d could not keep up with the Yamaha in terms of TR when placed further back. I tried to return the B1200D to Amazon a few weeks ago before my return period expired but they wouldn't pay for or accept return shipping but since I spend ridiculous amounts of money on Amazon they just refunded all my money and didn't ask for the sub back. So free mbm! I will probably post it for sale here at some point soon.
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JVC x750r, Seymour AV Matinee Silver 122" 16:9
Lumagen Radiance Pro 4242, Lyngdorf MP-50, D-sonic M3-4000+M3-800S
Panasonic UB900, Roku Ultra,
JTR 228HTR x 3 LCR, JTR S8HTs x 4 surrounds, Tannoy 601DC x 4 Atmos
Powersound Audio V1800 x 4 (7.4.4)