SB Acoustics GEMA Bookshelf Speaker Kit

The SB Acoustics GEMA Bookshelf Speaker Kit offers a complete, high-fidelity DIY solution for audio enthusiasts seeking to build their own reference-quality loudspeakers. This carefully matched set includes a dedicated woofer and tweeter, engineered to deliver balanced, natural sound reproduction that rivals commercial designs. Whether you are constructing a dedicated stereo pair for critical listening, assembling a home cinema system, or embarking on a rewarding weekend project, this kit provides the essential components to achieve professional-grade results with confidence.

Technically, the kit features a woofer with a sensitivity of 86 dB and a maximum linear excursion of 12 mm (peak-to-peak), ensuring deep, controlled bass response. The tweeter offers a higher sensitivity of 90 dB and a precise 0.51 mm excursion for crisp, detailed highs. The woofer’s electromagnetic Q factor (Qes) is 1.78, while the midrange driver measures 0.35, and the tweeter also 1.78, indicating well-damped transient behaviour. The woofer requires a 140.3 mm cut-out and is secured with eight mounting holes, while the tweeter uses a 27.5 mm cut-out with four holes. All components are designed for straightforward assembly, making this kit an ideal choice for both seasoned builders and newcomers to DIY audio.