ZSound S28 Passive Subwoofer

The ZSound S28 is a professional dual 18-inch passive subwoofer engineered to deliver deep, powerful, and impactful bass for large-scale sound reinforcement. Designed with a vented horn-loaded enclosure and high-performance drivers, it provides exceptional low-frequency response for concerts, churches, stadiums, theaters, and touring applications.

Key Features

• Dual 18-inch high-output subwoofer drivers
• 1600W AES continuous power handling
• Vented horn-loaded cabinet for deep, punchy bass
• High 141 dB Peak SPL for powerful low-frequency output
• Rugged 18 mm & 24 mm Baltic birch plywood enclosure
• Durable black Polyurea finish for touring reliability
• Professional Neutrik NL4 Speakon connectors
• Optimized for line array systems and large venue installations

Specifications

• Type: Dual 18" Passive Subwoofer
• Frequency Response: 32 Hz – 180 Hz (±3 dB), 30 Hz – 250 Hz (-10 dB)
• Drivers: 2 × 18" Subwoofers
• Power Rating (AES): 1600W
• Maximum SPL: 141 dB Peak
• Sensitivity: 102 dB SPL
• Nominal Impedance: 8 Ω
• Coverage: Omnidirectional
• Connectors: 2 × NL4MP Neutrik Speakon
• Cabinet Material: 18 mm & 24 mm Baltic birch plywood
• Dimensions: 561 × 1165 × 670 mm
• Weight: 76 kg

Why It's Best For

• Large churches and worship venues
• Concerts and live touring productions
• Stadiums and outdoor events
• Theaters and auditoriums
• Nightclubs and large entertainment venues
• Rental companies needing powerful, reliable low-frequency reinforcement
• Pairing with ZSound line array systems such as the LA210 for a complete professional PA setup