Electro-Voice EKX-18S - 18" Passive Subwoofer with Plywood Enclosure and M20 Mount

Electro-Voice EKX-18S - 18" Passive Subwoofer with Plywood Enclosure and M20 Mount

The Electro-Voice EKX-18S is an 18" passive subwoofer designed to authoritatively extend the low end of portable PA systems and fixed installations. It houses the 457mm EVS-18C transducer in a compact , 15mm plywood enclosure with internal bracing and a highly durable EVCoat finish. It delivers 400W continuous (1600W peak) , 96dB sensitivity, and up to 134dB peak SPL , with a frequency response of 35Hz–300Hz (-10dB) / 50Hz–100Hz (-3dB) . An M20 threaded top plate allows for mast mounting of a satellite, and slot-in ports minimize distortion while maintaining clean low end extension. A powder-coated 18 AWG steel grille , dual NL4 connectors , and heavy-duty metal handles are included.

Main features

• Transducer : EVS-18C 18" (457 mm) high sensitivity.
• Rated power : 400 W continuous / 1600 W peak ; 8 Ω (min. 7 Ω).
• Performance : 96 dB sensitivity; 134 dB SPL peak at 1 m (half-space measurement).
• Frequency response : 35–300 Hz (-10 dB) ; 50–100 Hz (-3 dB) .
• Recommended processing : high-pass filter at 30 Hz (subsonic) to protect the system.
• Robust enclosure : 15mm plywood with internal reinforcement and EVCoat finish.
• Oversized slot-type ports for low distortion and excellent bass extension.
• Mounting : M20 top thread for satellite mast.
• Connections : double NL4 for easy chaining.
• Touring Construction : Metal handles and 18 AWG powder-coated steel grille .
• Dimensions : 520 × 606 × 612 mm ; weight : 31.8 kg .

Product benefits

• Deep, controlled bass thanks to the slot-type port design and EVS-18C driver.
• Easy integration with full-range boxes using the M20 mast and NL4 wiring.
• Professional reliability : wooden enclosure with EVCoat, steel grille and hardware designed for intensive use.
• Compact format for its output level, easy to transport and stack.

Use cases

• PA systems for live performances , DJs , corporate events and fixed installations .
• Configurations with satellite on a mast ( M20 ) or ground stacked for medium-sized venues.

Frequently Asked Questions

What is the recommended filter? A 30 Hz (subsonic) HPF as indicated on the manufacturer's data sheet.
How does it differ from the EKX-18SP? The EKX-18S is passive (requires external amplification/processing); the EKX-18SP is self-powered with built-in DSP.
Can I top-mount a speaker? Yes, using the top M20 thread and a suitable pole.

Description for projects

Electro-Voice EKX-18S passive subwoofer with EVS-18C transducer (18") ; power 400 W continuous / 1600 W peak ; 8 Ω (min. 7 Ω); sensitivity 96 dB ; 134 dB SPL peak ; response 35–300 Hz (-10 dB) / 50–100 Hz (-3 dB) ; recommended HPF 30 Hz ; 15 mm plywood enclosure with EVCoat , slot-type ports; M20 top thread ; 2 × NL4 connectors; 18 AWG steel grille; 520 × 606 × 612 mm ; weight 31.8 kg .