The Original and Genuine Veronica® Stereo Coder

The Original Veronica® Stereo Coder seamlessly converts any mono (MPX) FM transmitter into a high-fidelity stereo broadcast system. Utilizing a 100% analog, quartz-controlled architecture, this coder processes discrete Left and Right audio channels into a unified Multiplex (MPX) signal. It is engineered for universal compatibility, integrating perfectly with any transmitter that maintains a flat amplitude and phase response up to 53 KHz.

By generating a rock-solid 19KHz pilot tone, the circuit ensures perfect synchronization with any standard FM stereo tuner. As one of the few professional-grade, hardware-based analog coders remaining on the global market, it delivers a transparent, 'warm' audio signature and superior reliability in high-RF environments—performance that modern digital DSP alternatives often fail to replicate.

With a production heritage spanning over 20 years, the Original Veronica® Stereo Coder remains a global industry standard for analog stability. This circuit is engineered for extreme resilience, maintaining peak performance even when subjected to the high-energy RF fields found within transmitter enclosures.

The robust architecture allows for successful integration with minimal additional shielding, operating without instability or induced noise. Our performance claims are not based on lab prototypes, but are field-proven by more than 4,000 units sold to broadcasters worldwide over the last 15 years—making it one of the most reliable and trusted stereo encoders on the market today.