First time I auditioned on a silent stage at church... they had that exact ButtKicker bassboard. I bought a Buttkicker transducer because of that board, but Buttkicker stopped producing that board. I had to mount it on plywood, and worked great... but I decided to go with 2 lower profile transducers for ease of transport reasons. They are not as strong as the Buttkicker, but it does the job. Love the sub-bass immersion on stage... and I love it just as much at home.
I loved that Buttkicker version... Bassboards really enhances playing ampless on stage with IEM's... making silent stage more satisfying, immersive, and enjoyable.