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JBL's idea with the STX800 Series was to offer the professional touring musician or the enthusiastic hobbyist with a commitment to great sound an alternative to light-duty portable PA speakers without making the commitment to full-size line array tour sound systems. JBL's promotional literature for this series states its place in the market beautifully: "Our goals at the inception of this project were simple: Offer a high performance, high density system solution in a truck-pack friendly format. Develop concert-worthy floor monitors and side fills that could affordably complement any touring sound system. Deliver an affordable, great sounding subwoofer that could reproduce true low frequency at elevated sound pressure levels." The JBL STX818S 18" Bass Reflex Subwoofer is the low end foundation of this design concept.

The STX818S is a single 18" compact high power subwoofer system in a front-loaded, vented enclosure designed for minimum frontal area. It provides 1,000 watts of continuous pink noise power handling, 2 kW program and 4 kW peak. The STX818S also comes equipped with a top-mounted M20 pole-mount and an optional wheel kit.

The STXWhether you're in need of ancillary speakers for a full-blown tour sound system, ground-stacking for a live concert performance, installing speakers in dance clubs or performance venues, touring clubs with your band, or you are a performing mobile DJ, STX800 Series is the smart choice.

  • 18 in. Super Vented Gap woofer for extended low-frequency output
  • Large port area for reduced distortion
  • 20 mm threaded pole socket for solid, secure satellite speaker mounting
  • Rugged DuraFlex coated enclosures sized to be truck pack friendly
  • Order now to enhance your existing system or build from the ground up.
  • Frequency Range ( -10 dB): 35 Hz-250Hz
  • Frequency Response (± 3 dB): 40 Hz-120Hz
  • Sensitivity (1W/1m): 96dB
  • Power Rating
  • (Cont. Pink Noise/Program/Peak): 1000 W / 2000 W / 4000 W
  • Rated Maximum SPL: 132 dB SPL Peak
  • Nominal Impedance: 8Ω
  • Input Connectors: Two NL4
  • Operational Modes: Subwoofer
  • Dimensions (W x H x D): 22.4" x 22.0" x 28.3"
  • Net Weight: 45 kg (100 lb)
  • MPN: STX818S
  • UPC: 50036904148

Audio MIDI Plus is committed to deliver the best experience for our customers. If for some reason you are not satisfied with your purchase, you may return it for a refund of the purchase price, an exchange or a store credit within 30 days from the ship date. 

In the unlikely event that you received a defective product, a wrong product, or damaged product, Audio MIDI Plus will replace it at no charge of any additional shipping cost. We will send you a prepaid label to return the item, and ship you a replacement. You will not incur any shipping charges. Please notify us of any of damaged, defective or misshipped products within 14 days.

After 30 days, you may request manufacturer warranty if your item malfunctions. Unless otherwise specified, Audio MIDI Plus is an authorized dealer for all the brands we represent.

How to request a return:
Please email us or call us to obtain a RMA number. All returns must be in a re-sellable condition and include all packing materials, accessories and paperwork. We may apply a restocking fee if the returned products fall into these following categories:

  • Missing original packaging, manuals, accessories, or any contents that was included
  • RMA number was not associated with the return
  • Items not in original like new condition

Please send all returns to:
Audio MIDI Plus Returns
3725 Saddle Drive,
Carlsbad, CA 92010

The following items are not returnable, unless received DOA, in which we will send a replacement:

  • Software
  • Electronic Delivery of Software
  • Special orders
  • DVD’s

Items that fall into the in mouth and in ear use category, such as mouthpieces, earphones, ear plugs, harmonicas, cannot be returned due to health regulations

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While most items are in stock either in our retail store or fulfillment warehouse in Carlsbad, CA, in some cases items may need to be ordered and/or drop shipped from the manufacturer. Please allow 3-10 days for order processing, fulfillment, and setup, as well as transit and delivery time. Tracking will be available within 48 hours in most cases.

Please call us at (844) 577-4502 10AM-6PM PT M-S for an IN-HAND description of the item that you are interested in. We are always happy to help, and look forward to speaking with you if needed. Live Skype may also be available for you.

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