Issues with RT-10D

[Dejan]

I own a 2005 new version of the new larger VMPS sub and plan on upgrading to something smaller and as musical. The dealer suggested the RT-10D and RT-12D. He said that the 10D was more punchier and more musical and the 12 goes lower. I opted to audition the 10d in my 15x13 theater room because I like a sub that has a clean articulating bass. I pluged in this sub, placed it in the middle of the room and walked to all the corners of my room and to be honest all the corners except for one sounded the same to I proceeded to place the sub in the corner behind the L/F speaker. THe placement prodiced OK base but not nearly as clean or musical, calibationg the sub in this corner turned the output down but did not make the sub musical at all. In fact the sub sounded like a one frequency machine that only articualted the amplitude of the one frequency and that is it. As I turned up the volume I can get the false ceiling of the room to lift up and down and rattle the walls but still cannot hear the bass. I can feal it but can;t hear it. I repeated this excercise in all 3 corners with outcome simular to the first one I described. I have to say that the location near the seat that is 7 feet away from the listening position under the Right rear speaker is the location that produces the best results but still not what I was expecting. I okayed with the 0-180 phase adjustments with little to no effect on the listening postition which I think is related to the sub being too close to the listeninig position. I want to make this sub have a nice base articulating tone - what am I doing wrong? Someone please help befor I move on to a different manufacturer. I want this sub due to it's size and ease of placement. Any suggestions???

[colterphoto1]

If you are experiencing ( feeling ) bass and have ceiling tiles coming out of the tracking.... there is nothing wrong with the sub, it is working as intended. You most likely prefer a subwoofer that is not flat or has a high output in the midbass. The room is the major contributor to the sound of the sub. The room correction software is doing it's job to remove peaks that you may mistake for bass ( boominess ) from room resonances.