SR3D® CubesSR3D Cubes! Unique adjustable binaural microphones Plug in power or XLR type, the XLR type uses our new PCB circuits. Two cubes come with an adjustable stereo bar and are removable from the bar, they have a 1 4" tripod adapter under the cube, so each can be mounted on another microphone stand if you wish to try them further apart. Solid metal bar with slide adjustable mounts Stand mount fitting with 1 4" thread 3. 5mm jack option comes with: Two audio