This complete PA system package combines dual 15" main speakers with 18" subwoofers to deliver full-range sound for bands, DJs, and live venues. Whether you're running sound for a wedding reception, outdoor festival, or church service, this system provides the low-end extension and vocal clarity needed for professional results.

The SA-155T main speakers handle 700 watts RMS each with dual 15" woofers and 1.5" titanium tweeters, while the SAP-18SFF subwoofers add 500 watts RMS of deep bass extension down to 30Hz. Together, they create a balanced system that covers the full frequency spectrum from sub-bass to crisp highs.

Each main speaker features dual ports for enhanced bass response, 4-ohm impedance for maximum power transfer, and 96dB sensitivity for efficient output. The 18" subwoofers operate at 8 ohms with 98dB sensitivity and include top-mount capability for elevating the main speakers. Both components use professional Speakon and 1/4" inputs with daisy-chain capability for easy system expansion.

This system handles venues up to 400 people for speech or 250 people for live music. Perfect for mobile DJs, bands requiring serious low-end, churches with contemporary worship, and event companies serving medium to large gatherings. The subwoofers transform any PA system from adequate to impressive, delivering the chest-thumping bass that makes music feel alive.

The package includes four 25-foot Speakon cables with 14-gauge conductors and locking connectors. All components feature black carpet covering with metal corners and recessed handles for reliable transport. Backed by Seismic Audio's one-year warranty and fast shipping to get your system working immediately.

Technical Specifications

Frequently Asked Questions

What size venues can this PA system handle?

This system works well for venues holding 250-400 people depending on the application. For speech and acoustic music, it can cover up to 400 people effectively. For rock bands or electronic music where bass impact is critical, it's ideal for 250-300 people. The dual 15" mains provide strong vocal projection while the 18" subs deliver the low-end extension needed for contemporary music styles.

Do I need both the main speakers and subwoofers, or can I use them separately?

You can use either component separately, but they're designed to work together for full-range coverage. The main speakers alone handle most music well but lack deep bass below 45Hz. The subwoofers need main speakers for midrange and high frequencies. Together, they create a complete system covering 30Hz to 20kHz for professional sound reinforcement.

What amplifiers work best with this speaker package?

The main speakers require amplifiers delivering 700-1000 watts RMS at 4 ohms per channel, while the subwoofers need 500-750 watts RMS at 8 ohms per channel. Popular choices include Crown XTi series, QSC GX series, or Seismic Audio's own SA series amplifiers. You'll need either a 4-channel amplifier or two separate 2-channel amps to power the complete system.

How do I connect and position these speakers for best results?

Connect your mixer to the amplifiers, then run the included Speakon cables from amps to speakers. Position the subwoofers on the ground with main speakers pole-mounted on top using the built-in top hats, or place them separately for better bass distribution. The subwoofers work best positioned together near the stage center, while mains can be spread wider for better coverage.

Can I add more speakers to this system later?

Yes, both the main speakers and subwoofers feature parallel inputs for daisy-chaining additional cabinets. You can add more mains for wider coverage or additional subs for more low-end impact. Just ensure your amplifiers can handle the reduced impedance when connecting multiple speakers in parallel, and consider the power requirements for your expanded system.

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