Superior technology is instilled in this midrange speaker to reproduce even wider-range audio with improved low frequencies. The result is extremely natural and detailed sound with high separation. The pulp-based composite cone is very solid, increasing the linearity and reproduction accuracy. The Diamond Like Carbon-coated titanium centre cap is also plated with ion, which further improves rigidity and resonance reduction. These qualities also ensure better tone matching with the other RSII speakers. A specially-designed corrugated surround allows expanded cone movement while controlling resonance for emphasised bass response. This speaker features a high-performance magnetic circuit with increased driving force, which gives excellent linearity from the mid-low to high frequencies. In order to achieve a highly rigid and low-resonance design, the unique full-basket zinc frame and tungsten holder are joined together at 5 points. A zinc die-cast back chamber is included, making a connection to the TS-T01RSII and TS-M01RSII speakers easier. Without the chamber, the unit can function as a mid-bass speaker.