RDL ST-CX2S Subwoofer Crossover Filter

Bring professional low-frequency control to your AV and security monitoring systems with the Radio Design Labs ST-CX2S subwoofer crossover filter. Engineered as a compact Stick-On signal equalizer, the ST-CX2S lets integrators and audio technicians extract and shape subwoofer content from stereo sources while preserving clarity for voice paging, background music, and surveillance monitoring. Dual isolated balanced bridging inputs prevent ground-loop issues and can be wired balanced or unbalanced; the 150 Ω balanced output drivers support both low- and high-impedance lines. The module operates at unity gain at 63 Hz and includes a BOOST control to dial in up to +5.5 dB at 32 Hz—ideal for rooms that need restored deep bass without adding noise or distortion. RDL’s SupplyFlex accepts 24 Vdc for versatile powering in distributed audio and security installations. Deploy the ST-CX2S to improve bass performance in control rooms, paging systems, and surveillance playback environments—contact your vendor or order now to tighten low-end response across your system.

• Tighten and clarify low-frequency output for clearer voice paging and music in monitoring rooms
• Dual isolated balanced bridging inputs let you extract a subwoofer feed from stereo sources without ground loops
• Adjustable BOOST control adds up to +5.5 dB at 32 Hz to restore impact where systems lose deep bass
• Low-noise, low-distortion active crossover maintains audio fidelity for security, surveillance and pro AV applications
• Flexible RDL SupplyFlex power accepts 24 Vdc for easy integration into distributed audio and monitoring installations