SB Acoustics SB15NRXC30-8-131T Bass-midwoofer

The SB15NRXC30-8-131T Bass-midwoofer from SB Acoustics represents a refined blend of engineering and material science, delivering accurate, low-distortion bass and midrange reproduction. This 5-inch driver is ideally suited for compact two-way or multi-way speaker designs, where space is at a premium but sonic performance cannot be compromised. Whether employed in a high-fidelity bookshelf speaker, a dedicated centre channel, or a small subwoofer system, this unit excels in producing clean, articulate low frequencies and a seamless transition into the midrange.

At the heart of the driver lies a Norex cone, a proprietary material chosen for its excellent stiffness-to-weight ratio and internal damping properties, which effectively suppress unwanted resonances. The 30.48mm voice coil, wound on a robust former, ensures high power handling and long-term reliability. With a total Q factor (Qts) of 0.33 and a resonance frequency (Fs) of 38 Hz, the driver is optimised for sealed or vented enclosures, offering a balanced blend of transient response and extension. The 5mm linear excursion (Xmax) and 88 dB sensitivity (2.83V/1m) further underscore its ability to deliver impactful, controlled output. The low voice coil inductance (Le) of 0.14 mH contributes to extended high-frequency response, making this driver a versatile choice for demanding audio applications.