The QRI-108 ST is a compact 8-inch bass reflex subwoofer from the professional QRI series, designed specifically for 100V systems. It is ideal for high-performance public address (PA) and emergency voice evacuation systems (EVAC), delivering powerful and accurate low-frequency reinforcement in installations with demanding acoustic environments.

Thanks to its ultra-compact wedge-shaped design, the QRI-108 ST is perfectly suited for discreet wall, ceiling, or corner mounting. It seamlessly integrates into venues such as sports and multipurpose halls, themed entertainment spaces, small stadiums, or theaters—providing a natural and impactful bass response.

The 100V technology makes it especially suitable for large-scale audio systems with extended cabling runs. The unit features two Speakon and two Phoenix connectors for flexible installation. Custom housing finishes in any RAL color are available upon request.

Technical Specifications:

• Model: QRI-108 ST
• Speaker Type: Passive bass reflex subwoofer (100V system)
• Power Handling:
• Rated Power: 100 W RMS
• Program Power: 400 W
• Driver: 1× 8˝ Neodymium woofer
• HF Horn: –
• Frequency Range (±3 dB): 48 – 20,000 Hz
• Sound Pressure Level:
• 1W/1m: 95 dB SPL
• Max SPL: 121 dB SPL
• Impedance: 100 Ohms @ 100 V
• Dispersion Pattern: Omnidirectional
• Connections:
• 2× Speakon
• 2× Phoenix (In/Out)
• Pole Mount: No
• Enclosure Design: Wedge-shaped (ideal for wall/ceiling mounting)
• Protection Class: IP 44
• Color: Black (custom RAL finishes available)
• Dimensions (H×W×D): 340 × 400 × 340 mm
• Weight: 8.7 kg

Scope of Delivery:

• 1× QRI-108 ST subwoofer
• User manual

Key Features:

• Ideal for 100V PA and EVAC systems
• Ultra-compact design for discreet installation
• Natural, transparent bass sound
• Omnidirectional dispersion
• Suitable for both horizontal and vertical mounting
• Rugged IP 44-rated enclosure
• Available in any RAL color on request