The Revelator midranges are well known for their sliced paper cone technology. The slices are filled with damping glue which dramatically reduces break-up modes in the diaphragm. In combination with the Scan-Speak's low-loss linear suspension and the patented Symmetrical Drive (SD-1) it represents a breakthrough in midrange clarity and overall smooth frequency response characteristics.
Patented Symmetrical Drive Motor System
Low-Loss Linear Suspension
Coated Foam Surround
Sliced cone technology (controls breakups)
High Sensitivity 89dB @ 2.83V
Rigid Titanium Voice Coil Former
Cast Aluminum Frame
Consider a sealed box with 50% filling of about 0.5 to 0.9 cubic foot. Your roll off will be about 76Hz.