Dayton Audio RST28A-4 1-1/8" Reference Series Aluminum Dome Tweeter

The Dayton Audio Reference RST28A-4 Dome Tweeter represents a significant step forward in high-frequency driver design, offering exceptional clarity and precision for discerning audio enthusiasts. This 25.4mm dome tweeter is engineered to deliver detailed, airy treble that brings recordings to life, making it an ideal choice for high-fidelity loudspeaker projects, studio monitors, or custom installations where accurate sound reproduction is paramount.

Whether you are upgrading an existing two-way design or building a dedicated high-end system from scratch, this tweeter excels in applications requiring low distortion and wide dispersion. Its carefully balanced parameters allow for seamless integration with midrange drivers, ensuring a cohesive soundstage that remains natural across various listening positions. The RST28A-4 is particularly well-suited for bookshelf speakers, compact floorstanders, or even centre channels where vocal clarity and instrumental detail are critical.

Technically, the tweeter features a 25.4mm treated fabric dome with a resonance frequency of 775 Hz, supported by a robust neodymium magnet system. Its impedance is rated at 4 ohms, with a DC resistance of 3 ohms, and a sensitivity of 92.5 dB (2.83V/1m) ensures efficient power handling. The total Q factor of 0.93, combined with low inductance (0.03 mH), contributes to controlled, extended high-frequency response. The cut-out diameter is 73 mm, with an overall depth of 44.5 mm and a frame diameter of 104.8 mm, making it straightforward to mount in most enclosures.

In summary, the Dayton Audio Reference RST28A-4 Dome Tweeter offers a compelling blend of technical refinement and practical performance, delivering the detailed, open sound that serious builders demand.