It’s a refined version of our 604-8H-II, this model boasts a different high-frequency horn than the previous models. Our new exponentially-flared radial horn provides excellent upper end response not achieved in any previous version of the 604. When installed in a properly designed enclosure, its’ performance is, to say the least, impressive. Stereo imaging of the new 604-8H-III is amazing and very real-to-life. It is supplied with our our proprietary passive crossover, which is built using the highest quality components.