I've been considering the D18E-I as part of my studio configuration starting early next year. Without the integrator,I assume it wouldn't be of much use. I need this frequency range/response for multiple instruments. Has anyone had any experience with this particular rig? Finding a Bag End distributer has been unsuccessful in my area thus far. This seems to meet the specifications I'm looking for. Does anyone know if this is a ported cab or closed? Thanks guy's! -Luke