HiVi B2S Full-range Woofer

The HiVi B2S Full-range Woofer is a compact yet remarkably capable broadband subwoofer designed to deliver clear, full-range audio reproduction in space-constrained applications. This driver excels in small speaker systems, portable Bluetooth enclosures, and custom DIY audio projects where traditional larger woofers cannot fit. Its versatility also makes it an excellent choice for upgrading multimedia speakers or creating bespoke sound installations that demand balanced performance across the frequency spectrum.

At the heart of the B2S lies a powerful neodymium magnet, which provides exceptional magnetic flux density while keeping the overall weight and size to a minimum. With a nominal diameter of just 50.8 mm and a 25.4 mm voice coil, this driver achieves a maximum linear excursion (Xmax) of 1.5 mm, ensuring controlled bass response. The 8-ohm impedance and 6.5 ohm DC resistance pair well with low-power amplifiers, while the 20-watt power handling allows for moderate volume levels without distortion. Key Thiele-Small parameters include a resonance frequency (Fs) of 152 Hz, a total Q factor (Qts) of 1.2, and an equivalent volume (Vas) of 0.198 litres, indicating suitability for sealed enclosures. The mechanical compliance (Cms) of 0.689 mm/N and sensitivities of 78 dB SPL (1m/2.83V) further define its efficient yet controlled behaviour.

Whether you are designing a miniature bookshelf speaker or a portable audio project, the HiVi B2S offers a reliable foundation for achieving articulate sound with surprising depth.