The Flex-812 line array system delivers professional-grade sound coverage for DJs, bands, and venues seeking maximum impact from a compact footprint. This complete PA solution combines a powered 12" subwoofer with eight 4x4" line array speakers to create wide, even sound dispersion that reaches every corner of your venue.

The system's 500-watt RMS subwoofer handles deep bass frequencies from 45Hz while the eight line array speakers (180 watts RMS each) provide clear mid and high frequency coverage up to 19kHz. The integrated Class D amplifier and 96kHz DSP processing ensure clean, powerful output with peak SPL reaching 126dB.

Built-in Bluetooth 4.2 connectivity lets you stream audio wirelessly, while the onboard mixer provides dedicated controls for microphone level, echo, treble, bass, subwoofer volume, and master output. Multiple input options include combo XLR/jack inputs, RCA connections, plus USB and SD card slots for direct digital playback. The line array configuration creates consistent sound coverage for venues up to 300 people.

Setup requires connecting the subwoofer to the line array speakers using standard 1/4" cables. Each line array speaker houses four 4" drivers with 1" compression drivers for full-range reproduction. The included speaker stands and mounting brackets provide flexible positioning options.

All Seismic Audio speakers ship free within the continental US and include our standard warranty coverage. Professional sound quality at a price point that makes sense for working musicians and mobile entertainers.

Technical Specifications

Frequently Asked Questions

How many people can the Flex-812 line array system cover?

The Flex-812 is designed for venues accommodating up to 300 people. The eight line array speakers create wide, even sound dispersion that maintains consistent volume and clarity throughout medium-sized spaces like wedding receptions, corporate events, school gymnasiums, and outdoor festivals. The 126dB peak output provides sufficient headroom for both music and speech reinforcement.

What cables do I need to connect the line array speakers to the subwoofer?

The system uses standard 1/4" cables to connect each line array speaker to the powered subwoofer. All necessary cables are included in the box, so you won't need to purchase additional interconnects. The setup is straightforward - simply run 1/4" cables from the sub's outputs to each array speaker and mount the speakers on the included stands.

Can I use this system without the subwoofer for smaller gigs?

While the line array speakers can operate independently, they're designed to work with the powered subwoofer for full-range coverage. The array speakers handle mid and high frequencies (with 4" drivers and 1" compression drivers), but you'll miss the deep bass response (45Hz-150Hz) that the 12" subwoofer provides. For acoustic performances or speech-only applications, the arrays alone might suffice.

How does the built-in mixer work with multiple input sources?

The onboard mixer features two combo XLR/jack inputs for microphones or instruments, plus RCA inputs for line-level sources. You can simultaneously use Bluetooth audio, USB/SD playback, and live microphone inputs. Individual controls let you adjust microphone volume, add echo effects, and balance treble, bass, and subwoofer levels independently from the master output volume.

Is this system suitable for outdoor events?

Yes, the Flex-812 works well for outdoor events up to 300 people. The line array configuration provides better wind resistance than traditional box speakers, and the 126dB peak output cuts through ambient noise effectively. However, like all PA equipment, it should be protected from direct weather exposure. The included stands allow for optimal positioning to maximize coverage area.

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