Should work well in that room. Try to get them underneath the ‘bottle catching safety net’ visible in that photo, around the level of the light-bar or slightly lower if you can reach. Gaff tape 'em directly onto the surface. You'll get cleaner highs than letting them stick out an inch or so and I've never experienced vibration problems doing so, even with them taped to the stage or stage lip. If they are directly against the surface the boundary effect works up though the highest frequencies. As the mic is moved farther away from the surface, the upper frequency limit of the boundary effect drops and you begin to get comb-filtering from reflections off the surface. In a practical sense however, it probably won't make that huge of a difference.
I'd probably space them something like 3' to 5' apart. If you plan on mixing the recording made with them with a SBD feed you can go wider than that without worries.
The DPA boundary mounts provide good protection for the mics when needed. I find using the boundary mounts produce a slightly more peaked high frequency response. Based on the sonics alone I usually prefer not using them unless I specifically want that response. You can compensate for that somewhat by not using any grid on the mic inside the boundary mount, but that does expose the element somewhat more. Grid or no grid, as John mentions, you need to be careful when inserting the mic into the boundary mount to make sure the capsule is pointing out. Taping directly to a hard surface without the boundary mount, orientation doesn’t really matter.
Special note on the boundary mounts- the response and the smooth surface of the mount both can work well for mounting the mics under fabric, making for less fabric noise and some upper response compensation for the fabric. I find the fabric noise reduction is as good or better than using the DPA 'concealers' designed for mounting the mics under fabric, which are a better choice if you don't want the response bump. The concealers can also be used like the boundary mounts whenever you need crush protection, the thin wire is then the most vulnerable part.
The ATs wouldn't but a Countryman B3 would certainly fit in there, but the frequency response is strongly determined by the volume of the small space around the capsule. It may sound peakier and that response bump may shift if the mic is shifted back an forth in the mount slightly, modifying the size of that tiny space. Consider the difference in interior volume of the low and high boost grids and you’ll get an idea of how a slight change in the volume immediately around the mic element can produce a significant response change.
Topic: Boundary Mounting 4061's (Read 4929 times)