The SAP-18SFF subwoofer pair delivers the deep bass foundation that live sound systems need for venues up to 500 people. These passive 18" subs handle everything from DJ gigs and band performances to church worship services where contemporary music demands serious low-end reinforcement.

Each cabinet pushes 500 watts RMS (1000 watts peak) through a high-power 18" driver with a 90oz magnet and 3" Kapton voice coil. This combination produces tight, controlled bass from 30Hz to 125Hz at 98dB sensitivity, giving you the headroom to cut through a full mix without distortion.

The 8-ohm impedance makes these subs easy to wire in parallel or series configurations with your existing PA system. Built with 3/4" plywood front panels and wrapped in durable black carpet with protective corners, these cabinets handle the rigors of regular transport. Recessed handles and integrated top-mount speaker poles make setup straightforward.

Perfect for mobile DJs who need portable bass, bands playing clubs and outdoor festivals, or churches upgrading their contemporary worship sound. The dual input terminals accept both 1/4" and Speakon connections, so they'll integrate with virtually any powered mixer or amplifier setup.

Each cabinet measures 28" tall by 22" wide by 22" deep. You'll receive two complete subwoofer cabinets ready to connect to your amplifier or powered mixer. Seismic Audio backs every purchase with a one-year warranty and ships nationwide.

Technical Specifications

Frequently Asked Questions

What size venues do these 18" subwoofers handle?

This pair of SAP-18SFF subs works well for venues holding 200-500 people, including clubs, wedding receptions, outdoor festivals, and contemporary church services. For smaller venues under 150 people, a single sub may be sufficient. Larger venues over 500 people typically benefit from additional subwoofer pairs for even bass coverage.

What amplifier power do I need to drive these subwoofers?

You'll want an amplifier that delivers at least 500 watts RMS per channel at 8 ohms to properly drive each subwoofer. Popular choices include QSC, Crown, or Yamaha power amplifiers in the 800-1200 watt range. Many powered mixers also have enough output power if you're running a smaller system.

Do I need subwoofers with my existing PA speakers?

If your main PA speakers are 12" or smaller, adding subwoofers will significantly improve your low-end response and overall sound quality. Subwoofers handle the bass frequencies (30-125Hz) so your main speakers can focus on mids and highs, resulting in cleaner sound and higher overall volume capability. Most professional sound systems benefit from dedicated subwoofer support.

What cables do I need to connect these subwoofers?

You'll need speaker cables with either 1/4" TS plugs or Speakon connectors to run from your amplifier to the subwoofers. Speakon cables are recommended for higher power applications and provide a more secure connection. Each subwoofer has dual input terminals, so you can daisy-chain them or run separate cables from your amp.

Can I use these subwoofers outdoors?

Yes, the black carpet covering and metal grille provide reasonable protection for outdoor use, though you should avoid direct exposure to rain or moisture. The 1000-watt peak power handling gives you plenty of headroom for outdoor events where you're competing with ambient noise and open-air acoustics.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov