The Tremor 18 delivers the deep bass foundation that makes live sound systems complete, whether you're running DJ sets, church services, or live band performances. This powered subwoofer handles the low-end duties so your main speakers can focus on clarity in the mids and highs.

Built around an 18-inch woofer with a 90 oz magnet and 3-inch voice coil, the Tremor 18 pushes 500 watts RMS through a Class D amplifier. The onboard low-pass filter sweeps from 40Hz to 300Hz, letting you dial in exactly where the sub takes over from your main speakers.

The real value comes from the dual-purpose design: dedicated subwoofer power plus two additional 150-watt peak outputs for your satellite speakers. Separate volume controls for the sub and satellites give you mix control right on the cabinet. XLR and 1/4-inch combo inputs accept signals from your mixer, while Speakon and banana plug outputs connect to passive speakers.

This setup works for venues up to 400 people, outdoor events, or any situation where you need controlled low-end impact. Churches benefit from the clean bass response during contemporary services, while DJs can push dance floor-filling bottom end without overwhelming the room. The pole mount on top positions satellite speakers at the optimal height.

Connect your mixer to the combo inputs using standard XLR or 1/4-inch cables. The cabinet includes everything needed except speaker cables to your satellites. Seismic Audio backs the Tremor 18 with a one-year warranty and direct shipping to your door.

Technical Specifications

Frequently Asked Questions

What size venue can the Tremor 18 handle?

The Tremor 18 works well for indoor venues up to 400 people or outdoor events up to 250 people. The 500-watt RMS power and 18-inch driver provide enough low-end impact for dance floors, worship services, and live band performances without overwhelming smaller spaces.

What cables do I need to connect the Tremor 18?

You'll need an XLR or 1/4-inch cable from your mixer to the subwoofer's input. If you're using the built-in satellite amplifier outputs, add Speakon or banana plug speaker cables to connect your passive main speakers. Standard audio cables work fine - no special subwoofer cables required.

Can I use this subwoofer with any brand of main speakers?

Yes, the Tremor 18 works with any passive speakers through its satellite outputs, or with any powered speakers using the line outputs. The adjustable low-pass filter (40Hz-300Hz) lets you match the crossover point to whatever main speakers you're running.

Do I need two subwoofers or will one handle most gigs?

One Tremor 18 handles most solo DJ gigs, small bands, and church services effectively. For larger venues, outdoor events, or bass-heavy music styles, two subs provide better coverage and allow you to run each unit at moderate levels instead of pushing one to its limits.

How does the built-in satellite amplifier work?

The Tremor 18 includes two 150-watt peak amplifier channels specifically for powering your main speakers. Connect passive speakers to the Speakon or banana outputs, then use the separate satellite volume control to balance your mains with the subwoofer level. This eliminates the need for a separate power amplifier.

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