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Everything In Music Since 1958
Everything In Music Since 1958

JBL SRX928S Dual 18-Inch Powered Subwoofer

Original price $5,950.00
Original price $5,950.00 - Original price $5,950.00
Original price $5,950.00
Current price $4,129.00
$4,129.00 - $4,129.00
Current price $4,129.00

This item does not qualify for free shipping.

May require truck delivery or special handling.

♫ In stock
About Inventory Status

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In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

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Crucial and Compelling - The JBL SRX928S Dual 18-Inch Powered Subwoofer

The SRX928S is a dual 18-inch active subwoofer designed to complement SRX900 full-range sound reinforcement systems. The sub¬woofer houses two JBL 2279-1 18-inch woofers, featuring Differential Drive – JBL’s dual voice coil, dual gap technology – to deliver better heat dissipation, lower power compression, and wider dynamic range than conventional single-coil designs.

  • High-performance, high-density system solution in a truck-pack friendly format
  • High-power-handling transducers deliver low distortion, high fidelity, and class-leading output
  • Built-in, passively cooled Class D amplification with a universal power supply
  • Dual Ethernet ports with Neutrik etherCON connectors
  • Supports HARMAN HControl Ethernet
  • User-controllable DSP
  • LevelMax limiting uses sophisticated excursion-control algorithms to protect transducers
  • Rear-panel LCD provides complete access to control features
  • Reinforced 18mm plywood enclosures



  • Frequency Range
    • (-10 dB): 31 Hz - 100 kHz (array preset)
    • (-3 dB): 39 Hz - 80 kHz (array preset)
  • Coverage Pattern: Omnidirectional or Cardioid
  • Maximum Peak Output: 140 dB
  • System Type: Active subwoofer


  • Low Frequency: (1) JBL 2279G-1, 18 in diameter, 8 ohms, dual 3.0 in diameter voice coil, ferrite Differential Drive

Audio Input

  • Input Type: Balanced line level
  • Connectors: (2) Neutrik XLR (IN/OUT)
  • Nominal Input Sensitivity: +6 dBu (system starts limiting with broadband noise and music
  • Maximum Input Level: 21 dBu
  • Input Impedance: 100 kΩ


  • Type: Class-D
  • Number of Channels: (2)
  • Continuous Power: 1100 Watts LF: 400 Watts HF: 200 Watts
  • Peak Power: 2500
  • Cooling Type: Convection, external aluminum heat sink, internal on-demand fan

AC Power

  • Voltage Range
    • Nominal: 100-240 VAC, 50/60 Hz
    • Limits: 80-260 VAC, 50/60 Hz
  • Connectors: Dual (IN/OUT) Neutrik powerCON TRUE1 TOP
  • Sample Rate: 48 kHz
  • Bit Depth: 24 bit


  • Enclosure: 18 mm plywood, Black DuraFlex finish, two integral recessed handles
  • IP Rating: IP54
  • Grille: Powder coated 1. 8mm (14-gauge) hex perforated steel with acoustically transparent black cloth backing
  • Dimensions (H x W x D) : 565 x 1205 x 681 mm, 22.2 x 47.4 in 26.8 inches
  • Net Weight: 70.3 kg (155 lbs)
  • Shipping Weight: 81.8 kg (1 lbs)80

Manufacturer: JBL Professional
Model: SRX928S
SKU: I709120-N-5-WHXC
UPC: 691991035586

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

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