JBL ASB4128 Ultra Long Excursion High Power Single 18” Subwoofer

Weight: 163 lb
Brand: JBL ProfessionalJBL Professional

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Check out the JBL ASB4128! It is a medium power subwoofer system comprised of two 460 mm (18 in) low frequency drivers in a front-loaded, vented configuration. The deep, rectangular cabinet allows for extended low frequency bandwidth with minimum frontal profile. The enclosure is fitted with M10 threaded suspension points. Pre-engineered array bracketry is available.



  • Large vent area for high output.
  • Parallel/Discrete Switchable.
  • See Array Guide on applications such as performing arts facilities, theatrical sound design, auditoriums, houses of worship, live clubs, dance-clubs/discotheques, sports facilities and themed entertainment venues.



  1. Performing arts facilities
  2. Theatrical sound design 
  3. Auditoriums 
  4. Houses of worship 
  5. Live clubs 
  1. Dance-clubs/discotheques
  2. Sport facilities
  3. Themed entertainment venues



Frequency Range (-10 dB)

20 Hz - 1 kHz


Frequency Response (± 3 dB)

25 Hz - 1 kHz


Transducer Power Rating

4000 W (16000 W peak), 2 hrs.


Input Modes

Drivers Parallel / Drivers Discrete


Long-Term System

Power Rating

2400 W (9600 W peak), 100 hrs.


Maximum SPL (1m)

25 Hz - 200 Hz: 135 dB-SPL cont avg. (141 dB peak)


System Sensitivity

25 Hz - 200 Hz: 99 dB-SPL, 1W (2.0V) @ 1m


Nominal Impedance

4 ohms in parallel-drive mode 2 x 8 ohms in discrete-drive mode


Low Frequency Driver

2 x 2269H, 460 mm (18 in) dia., 100 mm (4 in) Dual Coil Dual Gap neodymium Differential Drive®, VGC™ drivers



Rectangular cabinet, 16 mm (5/8 in) exterior grade 11-ply birch plywood


Suspension Attachment

16 points (4 top, 4 bottom, 4 each side) M10 threaded hardware



Black DuraFlex™ finish.

White available upon request.



Powder coated 14 gauge perforated steel, with acoustically transparent black foam backing.


Input Connector

NL4 Neutrik Speakon® and CE-compliant covered barrier strip terminals. Barrier terminals accept up to 5.2 sq mm (10 AWG) wire or max width 9 mm (.375 in) spade lugs. Speakon in parallel with barrier strip for loop-through.


Environmental Specifications

Mil-Std 810; IP-x3 per IEC529.


Dimensions (H x W x D in

vertical cabinet orientation)

1092 x 560 x 815 mm

(43.0 x 22.0 x 32.1 in)


Net Weight

71.9 kg (158.5 lb)


Optional Accessories

M10 x 35 mm forged shoulder eyebolts with washers.


Brand URL : http://www.jblpro.com/www/products/installed-sound/ae-series/asb4128#.VxAowMdqHdk

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Since 1992, dB Sound Store has worked with some of the biggest artists, producers and commercial facility owners in the entertainment industry to meet all of their diverse needs. The extensive client list of top industry professionals speaks to dB Sound's commitment to excellence.
Please contact dB Sound Store using the Contact form below. We will respond to you quickly by email or telephone regarding equipment inquiries, Design specs & purchases. We can put a package together to fit any budget. Let us know how we can help you today!

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