The Tremor 18 powered subwoofer pair brings professional-grade low-end extension to live sound systems, DJ setups, and permanent installations requiring deep bass impact. Each cabinet houses an 18-inch woofer driven by a 500-watt RMS Class D amplifier, delivering the foundation your PA system needs to fill larger venues with authoritative bass response.

Built-in satellite amplifier outputs provide 150 watts peak per channel across two additional channels, letting you power your main speakers directly from the subwoofer. The adjustable low-pass filter ranges from 40Hz to 300Hz, with separate volume controls for both sub and satellite outputs plus balance adjustment. A clip indicator prevents damage during high-output operation.

Each 98dB sensitivity cabinet weighs 84 pounds and measures 26.5" tall by 22.25" wide by 24.25" deep, housed in black carpet with metal corner protection. Top-mounted speaker pole sockets accommodate standard stands, while recessed metal handles ease transport.

These powered subs handle venues up to 400 people for DJ applications or band performances where deep bass extension is essential. Churches, clubs, and mobile performers benefit from the integrated satellite amplification, reducing rack requirements while maintaining full-range system control.

Connect via XLR or 1/4-inch combo inputs, with corresponding outputs for daisy-chaining additional units. Speakon and banana plug outputs handle satellite speaker connections. Each cabinet includes power cord and operates on standard AC power.

Seismic Audio backs each Tremor 18 with a one-year warranty. Fast shipping gets your bass system running quickly.

Technical Specifications

Frequently Asked Questions

How many people can the Tremor 18 pair handle for DJ events?

This subwoofer pair effectively covers DJ events up to 400 people in typical venue acoustics. The dual 500-watt RMS amplifiers provide enough headroom for dance music with deep bass content, while the built-in satellite amplification can power your main speakers simultaneously.

What cables do I need to connect the Tremor 18 to my mixer?

You'll need XLR or 1/4-inch cables from your mixer's subwoofer or auxiliary outputs to the Tremor 18 inputs. For satellite speakers, use Speakon or banana plug speaker cables from the subwoofer outputs to your main cabinets. Standard AC power cords are included.

Can I use the built-in satellite amplifiers to power my main speakers?

Yes, each Tremor 18 provides 150 watts peak across two channels specifically for powering satellite speakers. This eliminates the need for separate amplifiers in smaller systems. Use the individual volume controls to balance your subwoofer and main speaker levels.

How do I set the crossover frequency for my system?

Start with the low-pass filter around 80-100Hz for most applications, then adjust based on your main speakers' low-frequency response. Higher settings (up to 300Hz) work for smaller satellite speakers, while lower settings (40-60Hz) complement full-range mains with good bass extension.

Do I need two subwoofers or will one Tremor 18 work?

While one unit provides substantial bass, the pair offers better coverage and power distribution across larger venues. Stereo bass content benefits from dual subwoofers, and the increased headroom prevents individual units from working as hard during peak output demands.

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