Magma-118S-PW - Active 18" High Power Subwoofer Cabinet

Model #: Magma-118S-PW (18" Active Sub Woofer) 18" PA Subwoofer - 4" Voice Coil Built in High Efficient Amplifier Master Volume Control
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The Magma Series of Pro Audio Loudspeakers were designed to provide all the power and sound reinforcement you desire for essentially any environment. The Magma-118S-PW is an active 18 Inch Subwoofer when added with the 2-Way models of the Magma Series delivers an amazing subwoofer / PA Loudspeaker System! The Magma series offers superior low end and boom at a fraction of the cost of our more expensive counterparts! These subwoofers are ideal for most any Pro Audio application and environments including Public Address, DJ's, Live Sound, Stage, Studio, Karaoke, and Churches. The Magma Series is perfect for any situation where sound reinforcement is needed, especially where the need for low end frequency extension is needed!. The Magma Series of Subwoofer Cabinets can be configured in a number of ways, fitting the needs for everyone from MC's, DJ's, to bands. The Magma series offers incredible performance with affordable price tag. Whether your PA application is public address, live sound, karaoke or club sound, the Magma Series will meet your needs! 


The Magma-118S-PW is a solid reinforced cabinet with a powder coated full metal grill. The cabinet houses a 18" Woofer has a 4 inch Voice Coil and operates at 800 Watts RMS and 1600 Watts Peak Power. It reproduces low frequencies down to 40 Hz. It is powered by a Class AB amplifier with a built in cooling fan! This 18 inch subwoofer cabinet also features an XLR and 1/4" Combo Jack input as well as an XLR Signal Loop Through Output! The amplifier has a Phase / Invert Switch and a Master Volume Control! This 18" Subwoofer is the perfect solution to any PA application, whether it be Clubs, DJ, partys, weddings, karaoke or Church events. The Magma-118S-PW Active 18 Inch Subwoofer also contains a pole mount to accommodate an additional satellite speaker for optimal full range PA performance. 

The Seismic Audio Experience

The Seismic Audio brand was designed with the notion that every musician should have access to high quality Pro Audio gear at an affordable price! With your purchase, you will receive one 18 Inch Powered Subwoofer pictured and described above. You will also receive top notch customer service, plus all the technical expertise you will ever need is just a phone call or email away! Join the Seismic Audio revolution and see what tens of thousands already know. Whether it is for the garage band, live sound, stage, or studio...Seismic Audio is bang for the buck, the best Pro Audio gear for all PA applications!


Active 18 Inch PA/DJ Subwoofer Cabinet
Subwoofer | PA Subwoofer | DJ Subwoofer
Active / Passive
Active (Powered)
1/4" and XLR Combo Jack Input and XLR Loop Through Output
LPF (Low Pass Filter)
40 Hz - 300 Hz
Volume Controls
Master Volume Control
Power Rating
800 Watts RMS - 1600 Watts Peak
Nominal Impedance
8 Ohms
Speaker Size
Magnet Size
90 oz
Recessed Pocket Handles
Voice Coil
4" Voice Coil
Frequency Range
35 Hz - 300 Hz
Frequency Response
40 Hz - 180 Hz
Crossover Frequency
180 Hz
Maximum SPL
125 dB
Powder Coated Full Metal Grill
Rectangular MDF (Medium Density Fiberboard)
Black Painted Texture
Pole Mount
Amplifier Type
Class AB
115.5 lbs per Cabinet
One Year Warranty
LPF Control Phase / Invert function


When will I get my order?

We realize that you want your Pro Audio Equipment yesterday. Here at Seismic Audio Speakers, we aim to ship items out immediately. If you place your order before 2:30 Central time, we will ship your pro audio equipment on the very same business day.
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