SKU: 58834560352

JBL SRX818S Passive Subwoofer System - 18in

Sale price$1124.99 Regular price$1249.99
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Ships within 48 hours · Estimated delivery Sep 7 - Sep 12

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Description

JBL SRX818S Passive Subwoofer System - 18inThe JBL Professional SRX818S 18" Passive Subwoofer System is designed for concert, touring, or installed applications. With a standard M20 pole cup for use with top boxes, indexed feet for stacking in both standard and cardioid positons, and a maximum SPL of 136 dB, the subwoofer is suitable for musicians, bands, DJs, PA systems, performance venues, corporate spaces, houses of worship, and more. A variety of tunings and presets is available for Crown

 

The JBL Professional SRX818S - 18" Passive Subwoofer System is designed for concert, touring, or installed applications. With a standard M20 pole cup for use with top boxes, indexed feet for stacking in both standard and cardioid positons, and a maximum SPL of 136 dB, the subwoofer is suitable for musicians, bands, DJs, PA systems, performance venues, corporate spaces, houses of worship, and more. A variety of tunings and presets is available for Crown ITech HD and XTI 2 amps as well as the dbx VENU signal processor.

 

Transducer Technology
Includes JBL's patented Differential Drive technology using ferrite drivers with 3" voice coils
Active or Passive Passive
Frequency Response -10 dB: 28 to 150 Hz
-3 dB: 45 to 150 Hz
Power Capacity 2400 W Peak 
1200 W Program
600 W Continuous
Maximum Sound Pressure Level (SPL) 135 dB
Nominal Sensitivity 96 dB (1 W/1 m)
Impedance 8 ohms
Crossover 80 Hz
Low Frequency Driver 2279H
Enclosure Material 18 mm plywood
Mounting M20 Threaded Pole Mount
Casters Accepts JBL WK-4S Kit
Input Connections NL4 Input, NL4 Loop-thru (+/-1 or +/-2 Selectable)
Handles 4
Finish Obsidian Duraflex™ finish
Grille Powder-coated, Obsidian, 14-gauge perforated steel with acoustically transparent black cloth backing
Dimensions 26.89" x 26.92" x 22.62" (683mm x 684mm x 575mm)
Weight 78.0 lb (35.4 kg)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 58834560352

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4.8 ★★★★★
Based on 9 reviews
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Verified Purchase
Amazon Customer
Dallas, US
★★★★★ 5
Lowered my LDL cholesterol
Size: 80 Count (Pack of 1)
Had borderline high LDL cholesterol, Dr recommended krill oil. Dropped 34 points in just 1 year!! Awesome product!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
P
Verified Purchase
Patricia Wheeler
Los Angeles, US
★★★★★ 5
Great.
Size: 80 Count (Pack of 1)
Have ordered for over 2 years. Helps keep me healthy. Thanks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 27, 2026
J
Verified Purchase
John G
Pawtucket, US
★★★★★ 4
Good quality, but…
Size: 60 Count (Pack of 1)
Good quality supplement for the price. I started to take it for my joints as I have an auto immune disease. My only complaint is that in order to get enough EPA for it to be effective for that I have to take a minimum of two a day but when I do that it makes me a little dizzy and upsets my stomach. I’m not sure if that’s because I’m on high blood pressure meds and because I don’t have a gallbladder, so I just take one a day of it for general health. I may try another brand just to see if my body has the same response.
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Reviewed in the United States on May 18, 2026
P
Verified Purchase
patriciakeyes
West Palm Beach, US
★★★★★ 5
A size easy to swallow
Size: 80 Count (Pack of 1)
Great product and finally the size that is easy to swallow.
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Reviewed in the United States on April 2, 2026
D
Verified Purchase
DH
Fort Morgan, US
★★★★★ 5
Dropped LDL by 38 at one year check up
Size: 60 Count (Pack of 1)
I am a 48 year old female weighing 126 lbs. I want to praise this product for reducing cholesterol levels. I have seen the cardiologist to be proactive since my dad died of heart disease and because it runs on both sides of the family. My cholesterol levels have been borderline high for several years but not to the point of needing medication. In April 2025 it was the highest levels so far. I had been eating healthy cereals and exercising at that time so I was surprised it had increased. I have taken this supplement daily for a full year without missing many doses. I just had my yearly check up on April 1, 2026, and my total cholesterol dropped by 37 and the bad LDL dropped by 38. I am very please with my results. All my levels were in the optimal range except the LDL and It was in the nearly optimal range per the Labcorp graph and total cholesterol was in the acceptable range. I have not exercised in 8 months and I eat a lot of fast food, so this product is the only explanation for the improvement. I also started the Megared CoQ10 about 5 weeks before my labs but it wouldn't be long enough to be that helpful yet. I am going to stay on the CoQ10 in addition to the Megared 4 in 1 product to see if it further lowers the LDL to the optimal range next year. In one year with no diet changes or exercise: Cholesterol total went from 228 to 191 LDL Cholesterol went from 161 to 123 The only thing I do not like about the product is the price but with those results I can't complain. It is worth it.
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Reviewed in the United States on April 3, 2026

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