Microscoope (with P.audio C15-600EL) single box specs;
Rear horn is tuned @47Hz
Sensitivity: 101db (@2)
Response: 42-150Hz 3db
Cabinet is designed for use in stacks (ideally four or more per side.. but even single box per side works well for smaller venues). Bass is punchy but still very deep.
I recommend to set crossover point no higher than 130Hz because phase shifts/delays characteristic for rear loaded horns. Low cut filter on 30-35Hz MUST be used with these cabinets to protect units from mechanical damage.