KSI Ceiling Subwoofer 12-1CS & 12-1CS-FR

2×2 Grid Downward Firing Subwoofer with White Fabric Grille

List Price – 12-1CS: $608.00 each, 12-1CS-FR with Duraflake FR: $768.00 each

The KSI 12-1CS Series 5 ceiling mount subwoofer is the ideal choice for extended low frequency reproduction when mounting in a 2×2 grid is specified. As with all KSI ceiling mount loudspeakers, the 12-1CS offers exceptional performance, solid bass response and high dynamic range.


The KSI 12-1CS features our high power 1258-8 12” cast frame transducer producing very smooth extended low frequency reproduction in a small enclosure that is a requirement of a 2×2 grid mounting system. The 1258-8 features a 2” high temperature voice coil and powerful magnet structure, making the 12-1CS highly efficient at converting electrical energy into acoustical energy. To enhance performance, the 12-1CS incorporates an optimally vented, stiff and lightweight enclosure. To provide the best performance, the 12-1CS should be connected to a high quality power amplifier and an active crossover. The recommended crossover frequency should be no higher than 250 hz.


All KSI ceiling and wall mount loudspeakers may be used in combination with the 12-1CS, providing unlimited solutions for your audio environment. The 12-1CS is optionally available fabricated from Duraflake fire retardant particle board by ordering the part number 12-1CS-FR.


Downloadable Resources:

KSI 12-1CS & 12-1CS-FR Specification Sheet
Installation Instructions
Wiring Diagram with 70 Volt Transformers
Duraflake Fire Retardant Particle Board Specifications