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MRX518S Single 18" Subwoofer

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The MRX518S is a compact, high-power subwoofer containing a 2044G 18" woofer in a front-loaded, vented enclosure. The speaker enclosure is designed to present a minimum frontal area. The system offers... Read More

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The MRX518S is a compact, high-power subwoofer containing a 2044G 18" woofer in a front-loaded, vented enclosure. The speaker enclosure is designed to present a minimum frontal area. The system offers complete input connection flexibility for compatibility with a variety of cabling schemes. The input panel incorporates a pair of Neutrik Speakon NL-4 connectors wired in parallel. The MRX518S is supplied with pins +1/-1 connected to the woofer. This may be easily reconfigured to work with cabling systems intended to drive subwoofers on pins +2/-2. For "subwoofer/satellite" configurations, the MRX518S audio speaker is equipped with a top-mounted, 36mm polemount socket that can receive the optional SS3-BK pole. This can be used to mount speakers equipped with standard 35mm pole sockets and weighing up to 100 lbs. The enclosure is constructed of top-quality plywood, coated in JBL's rugged DuraFlex finish, and braced to maximize low-frequency performance. The attractive CNC-machined, 16-gauge steel grille is internally lined with an acoustically transparent screen to provide additional driver protection and give a very professional appearance.

  • 18" 2044G driver for extended low-frequency output
  • Large vent area for reduced distortion
  • Low profile and compact
  • Tough DuraFlex finish enclosure
  • Applications:
  • Live performance venues
  • Frequency range: 40Hz-200Hz
  • Frequency response: 45Hz-200Hz
  • Sensitivity: 94dB SPL; 100dB SPL
  • Nominal impedance: 4 ohms
  • Power capacity (continuous/program/peak): 500W/1000W/2000W, 400W/800W/1600W
  • Rated maximum SPL: 127dB SPL (133dB SPL)*
  • Dimensions: 21"W x 22"H x 27.5"D
  • Weight: 72 lbs.
  • *Calculated on half space condition
  • Customer Reviews


by PowerReviews

(based on 4 reviews)

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Reviewed by 4 customers

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(2 of 3 customers found this review helpful)


Great sounding!

By DJ Kirk

from Newington CT

I recently upgraded my speakers from a B-52 Matrix 1000V2 to a pair of PRX615m. They are very powerful and sonically great, but lacked low end. The MRX518s was on sale recently, and I bought one to go with a Crown XTI 1000 I had laying around. This combo is incredible!! I really wanted the SRX718s, but this one is very impressive. Light weight, good looks great sound, gotta love JBL!!

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(1 of 3 customers found this review helpful)


Light, compact, 18 inch sub.. is it true?

By sokin

from long beach, ca

Wow, I can pick this sub with one hand from the handles. Its also compact. I drive a coupe and I put this sub in the front. Sound is tight and punchy... which is great and accurate. I usually do small gigs 100 guest or less and one gets the job done. I also have two EV 8 inch speakers that works well together. Only draw back is that you need a crossover for this unit, which can add another 100 bucks. But once you pick these up.. you won't regreat it!

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(7 of 9 customers found this review helpful)


Good Smooth Punch

By Mike

from Wisconsin

We bought a pair of these for a small church install along with the MRX 515 mains. They have good punch and are not overly sloppy sounding. You will want to tune your crossover frequency based upon your room and how tight you want the bass to be. As you dial up the crossover frequency, they will lose a little of the boom and get little fuller sounding, but it really depends upon your room. We analyzed (RTA) the room after install and found that these subs were super even from 40Hz to 90Hz. Use the 40Hz rolloff button if your crossover has one, otherwise it can get too muddy.

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(13 of 14 customers found this review helpful)


If weight is a factor, you'll want the JBLMRX518s.

By TheBeeOBee

from Tobyhanna, Pa

I bought a pair of these at Guitar Center to go with the MRX515 tops. These MRX518s subs are quite subtle as far as subs go, and dont necessarily give you the "I need a chiropractor" feeling. Instead, they give you a great sense of a much "fuller" sound being reproduced in the room and everyone will immediately notice the difference in your setup when you turn them on. At the first gig I used these in, that is what we experienced. While the band was setting up, i was playing music through the sound system...i forgot to turn the sub on...when i realized and turned on the amp the whole place started bobbing their heads and gave me compliments on the sound. I do like a more sub-heavy sound so I may still purchase the dual subs, but if size and weight is a factor, these are some of the best in the category. Just remember, get some good amps! They like at least 1000 watts at 4ohms. It's worth getting the quality to get the best out of these wonderul speakers.

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