The Chandler Limited REDD Microphone is a large diaphragm tube condenser microphone, combining mic and preamp into a single unit.
The patent pending REDD Microphone represents a shift in traditional microphone design, bringing together historic circuitry and the heralded EMI REDD.47 preamplifier sound in a new and unique way.
More info at Chandler Limited
Developments for Korg's instrument have been slow but promising.