With a ribbon optimized for the Lundahl output transformer, the overall frequency response of the ribbon microphone is extended, leaving a ribbon microphone that is very open, accurate, and quite breathtaking!
Ribbon Microphone Type and Dimensions: Low tension, 2 inch aluminum ribbon
Pattern: Figure of 8
Recommended Load Impedence: > 1000 ohms
Frequency Response: 30 to 18,000 Hz
Here is a link to the TapeOP Review!