Scan-Speak Revelator 28W/4878T01 Subwoofer

The Scan-Speak Revelator 28W/4878T01 Subwoofer represents a pinnacle of low-frequency engineering, delivering deep, controlled bass that transforms high-fidelity audio systems. Designed for the discerning audiophile, this driver excels in both sealed and ported enclosures, making it an ideal choice for home theatre setups, dedicated stereo systems, or custom loudspeaker projects where precise, articulate low-end response is paramount. Whether you are building a reference-grade subwoofer or upgrading an existing design, this unit ensures every note from the deepest organ pedal to the subtlest film score rumble is rendered with authority and clarity.

Technically, the Revelator is a marvel of precision. With a nominal diameter of 279.4 mm and a maximum linear excursion (Xmax) of 7 mm, it moves air with remarkable control. The low total Q factor (Qts) of 0.26, combined with a mechanical Q (Qms) of 6.21 and an electromagnetic Q (Qes) of 0.27, ensures tight, well-damped bass that integrates seamlessly with main speakers. Sensitivity is rated at 91 dB SPL (1m/2.83V), while the 4-ohm impedance and DC resistance (Re) of 3.1 ohms allow for efficient power handling. The voice coil inductance (Le) is a mere 0.5 mH, contributing to excellent transient response. A robust 7-hole mounting pattern and a cut-out diameter of 250.5 mm facilitate straightforward installation, while the overall depth of 155.6 mm accommodates compact enclosures. This subwoofer is a testament to Scan-Speak’s commitment to sonic excellence.