SB Acoustics SB13PFCR25-8 Bass-midwoofer

The SB13PFCR25-8 Paper Bass-midwoofer from SB Acoustics is a meticulously engineered driver designed to deliver natural, articulate bass and midrange reproduction. As part of the acclaimed PFC Paper series, this 5-inch (134.5mm) unit combines traditional paper cone warmth with modern acoustic precision, making it an ideal choice for high-fidelity loudspeaker designs, compact two-way monitors, and subwoofer-satellite systems. Its 8-ohm impedance and 80-watt power handling ensure compatibility with a wide range of amplifiers, while the 87dB sensitivity provides efficient performance in both sealed and ported enclosures.

This driver excels in applications requiring controlled, low-distortion bass response, such as bookshelf speakers, automotive audio upgrades, and custom DIY projects. The paper cone material offers a naturally damped, smooth frequency response that minimises breakup modes, resulting in a more musical and engaging listening experience. With a linear excursion (Xmax) of 4.5mm, the SB13PFCR25-8 maintains composure at higher volumes, delivering punchy, well-defined low frequencies without sacrificing clarity.

Technically, the driver features a total Q factor (Qts) of 0.33, indicating excellent transient response and suitability for smaller enclosures. The low DC resistance (Re) of 3.2 ohms and voice coil inductance (Le) of 0.77mH contribute to efficient power transfer and extended high-frequency extension. The robust motor system, with an electromagnetic Q (Qes) of 0.39 and mechanical Q (Qms) of 2.2, ensures tight, controlled cone movement. Four mounting holes and a cut-out diameter of 4.3 inches simplify installation, while the 1.4 kg/m mechanical loss factor (Rms) further reduces unwanted resonances.

In summary, the SB13PFCR25-8 is a versatile, high-performance bass-midwoofer that brings studio-grade accuracy to any audio project, combining SB Acoustics’ renowned build quality with the timeless character of a paper cone.