The Studiomaster Vortex 18SA is a high-power 18-inch active subwoofer designed for live sound reinforcement in churches, concerts, DJs, and medium to large PA systems. It delivers deep, powerful low-end performance with a 2400W peak Class D amplifier and a frequency response of roughly 38–150 Hz, making it capable of producing strong, punchy bass that supports full-band systems and large venues. In real use, it adds serious weight and impact to kick drums, bass guitars, and electronic music, giving a fuller and more professional live sound when paired with top or full-range speakers. The cabinet is built from 15mm plywood with a steel grille, making it durable for transport and stage use, while built-in DSP functions like low cut, delay, and volume control help with quick setup and system tuning. Key Features 18” Active Subwoofer (High-Power Bass System) – Designed for deep, powerful low-end reinforcement 2400W Peak Power Output – Massive headroom for large church and live sound systems 600W RMS / 1200W Program Power – Strong continuous performance for long services and events Deep Bass Frequency Range (≈ 43Hz – 150Hz) – Extends low frequencies for full worship and live music feel High Output SPL (up to 134 dB) – Loud, clean bass even in large halls Built-in 24-bit DSP Processing – Low cut, delay, and level control for system tuning Durable Plywood Cabinet (15mm) – Strong build for touring and heavy use Full Steel Front Grille – Protects driver during transport and stage use Dual XLR Inputs + Outputs – Easy integration with mixers and other speakers 35mm Pole Mount Support – Can be used with top speakers in full PA setup Large Carry Handles – Easier transport despite heavy build Specifications Type: Active 18” Subwoofer Driver: 18” woofer (75–99mm voice coil depending on variant) Power Output: Peak: 2400W Program: 1200W RMS: 600W Frequency Response: ~43Hz – 150Hz Max SPL: 134 dB DSP: 24-bit (low cut / delay / volume) Inputs/Outputs: 2 × XLR in, 2 × XLR out Cabinet Material: 15mm plywood Weight: ~35 kg Dimensions: ~530 × 682 × 610 mm Best For Large churches Live concerts & worship events Outdoor PA systems DJ + live hybrid setups
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