Well I went from absolutely no riser to a subwoofer riser. It was a YYYYYUUUUUGGGGGEEEEEE upgrade in tactile sensation.
I got to demo both nearfield and Crowson's for the first time over at
's place two years ago and that demo sold me on Crowson's. After the fact I built the subriser (had two extra RLp18's on hand, made it "easy") and all I could compare it to was it was like a perfect hybrid of both a good Buttkicker install and a good Crowson install. It had the natural feel and nuance of the Crowson but could also be damn right brutal like a Buttkicker. I felt like it was the best of both worlds although a compromise in itself too.
The build was an obvious choice as I had two spare 18's I wanted to do something with. So for someone else they would have to buy drivers. Then they need to power them. As for pure tactile sensation, this is rather inefficient both in cost, size and power requirements. However the choices are vast. Instead of a TT device, you pick a driver of choice. The performance is up to you. That part is kinda cool, I think. Then the riser takes up space. This can be a huge problem for some people. For example, we joke but
genuinely sounded interested in trying but he has a severe height restriction in his room. For 18's, my riser is about 1ft tall.
Not too many details about it. The construction is 2x8's all around with 3/4" Home Depot "quality" plywood for a top and bottom and one single 2x4 going down the middle (short, length-wise). That's it. Well....sorry, and the extra MDF baffles. That was only a requirement to account for the mounting depth of the 18's. Otherwise they are not required at all. There are pictures and the same details in the link in my sig.
So between this, nearfield and TT's.... they all have their pro's and con's. I think they all are deserving of the application and have their strengths in certain areas. Although I feel the Crowson's are the best overall, I love the riser system. It's just nuts and very effective with ULF material.