RST28F-4 1-1/8" Reference Series Fabric Dome Tweeter 4 Ohm

1-1/8" silk diaphragm offers remarkable clarity

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The Dayton Audio RST28F-4 1-1/8" silk dome Reference Series tweeter has remarkable clarity, low free air resonance, exceptional efficiency, and smooth frequency response, a combination seldom found in the industry at any price. This upgrade over the origi

The Dayton Audio RST28F-4 silk dome Reference Series tweeter offers exceptional efficiency from 1,400 Hz to 20,000 Hz with an extremely natural and dynamic sound. This unique 1-1/8" silk dome and a state-of-the-art Ferrofluid cooled motor system employs copper shorting rings to ensure that high frequency content is reproduced as transparently as possible, assuring studio-quality performance. RST28F-4 tweeters not only match the look and features of the RS woofers and midranges but also the clean, detailed, and uncolored sound that characterizes the entire series. These are just a few of the features that allow these tweeters to outperform some the most expensive audiophile high-frequency transducers.


• 1-1/8" silk diaphragm offers remarkable clarity
• Exceptional efficiency at 93.5 ±3dB from 1.4 kHz to 20 kHz and a smooth frequency response
• Well-designed phase bridge to balance the response in the upper octave
• Tuned rear chamber and high-quality Ferrofluid for excellent low-end response
• Low-distortion motor system achieves a rare level of transparency
• Matches the performance of even the most expensive audiophile high-frequency transducers

Speaker Series Reference Series
Model Number RST28F-4
Color Black
Unit of Measure Each
UPC 848791004919
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 1.8000
Speaker Type Tweeter
Nominal Diameter 1.125"
Power Handling (RMS) 80 watts
Power Handling (max) --
Continuous Program Power --
Impedance 4 ohms
Sensitivity 93.5 dB @ 2.83V/1m
Frequency Response 1,400 - 20,000 Hz
Voice Coil Diameter --
Magnet Weight --
DC Resistance (Re) 3.0 ohms
Voice Coil Inductance (Le) 0.03 mH
Resonant Frequency (Fs) 710 Hz
Mechanical Q (Qms) 2.52
Electromagnetic Q (Qes) 1.46
Total Q (Qts) 0.92
Diaphragm Mass Inc. Airload (Mms) --
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) --
Surface Area Of Cone (Sd) 6.6 cm²
Volume of Displacement (Vd) --
BL Product (BL) --
Compliance Equivalent Volume (Vas) --
Maximum Linear Excursion (Xmax) --
Driver's Mechanical Losses (Rms) --
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material --
Voice Coil Former --
Basket/Frame Material --
Magnet Material --
Overall Outside Diameter --
Overall Depth --
Baffle Cutout Diameter --
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --

SKU 848791004919
Model # RST28F-4
Barcode # 848791004919
Shipping Weight 0.7600kg

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