HiVi RT2C-A Planar Isodynamic Tweeter

The HiVi RT2C-A Isodynamic Planar Tweeter represents a significant step forward in high-frequency audio reproduction, offering a refined alternative to conventional dome tweeters. Engineered for audiophiles and DIY speaker builders, this driver excels in delivering airy, detailed treble with exceptional transient response. Its planar design makes it particularly well-suited for use in high-end two-way or multi-way loudspeaker systems, where it can be crossed over at 2,000 Hz using a second-order filter to integrate seamlessly with midrange drivers.

At the heart of the RT2C-A lies a large 23.1 × 117.1 mm planar diaphragm, which provides a wide, uniform sound dispersion pattern and minimises distortion. With a sensitivity of 94 dB SPL at 1 metre with 2.83V, it pairs efficiently with a range of amplifiers. The tweeter has a nominal impedance of 8 ohms and a DC resistance of 7 ohms, ensuring stable electrical loading. Its substantial 177.8 mm frame and a cut-out diameter of 157.2 mm require careful cabinet planning, but the result is a remarkably open and natural high-frequency performance. Whether upgrading an existing design or building from scratch, the RT2C-A brings clarity and precision to any serious audio project.