Secure Checkout
Your Shopping Cart Is Empty

Secure Checkout


In Wall Subwoofer OSD IWS88 Dual 8" Injected Woofers Back Bridge Plate

Purchase In Wall Subwoofer OSD IWS88 Dual 8" Injected Woofers Back Bridge Plate
  • Outdoor Speaker Depot SKU: OSD-IWS-88 dual-in-wall-passive-subwoofer-8-inch
  • In Stock


  • FREE Delivery by ,
    Order within hours and minutes
    Change Shipping Zip ? Free Shipping Over $50
    More Delivery Options

Lifetime Tech Support


Lifetime Tech Support

We improved the lower end of our popular dual in-wall subwoofer. By adding a strong reinforced back plate to stiff the structure of the subwoofer, we make it to sound deeper and clean. A subwoofer is designed to reproduce the lowest of audible frequencies and will give you that spine-tingling rumble effect that takes you out of reality and into the plot. With dual 8" Injected polypropylene woofers, bigger magnets and 350 Watts of power handling, the IWS-88 in-wall subwoofer performs excellently for home theater surround sound applications as well as for listening to music. Like all OSD Audio speakers, the IWS-88 includes a dog-ear bracket system that mounts securely to the sheet-rock after the cut-out hole has been made and the speaker has been dropped into the hole. The grille is paintable to match your room decor and we even include a cutout template that doubles as a paint shield. You'll experience thunderous, room-filling bass without filling up floor space.

Amplifier Suggestions
Because this is a passive speaker, it will require a subwoofer amplifier to power it. An ideal match to this subwoofer is our OSD SMP500 dedicated subwoofer amplifier that features 400W RMS @ 4 ohms, Variable High Cut Filter 30Hz-150Hz; front panel Knob, and Choice of Signal Level Input or LFE (Low-Frequency Effects).

Warning: California's Proposition 65


This product can expose you to chemicals, including vinyl chloride, which is known to the State of California to cause cancer. For more information, go to

  • Speaker Type: Dual 8" In-Wall Subwoofer
  • Woofer: Dual 8" Injected Polypropylene w/ Reinforced Back Plate
  • Frequency Response: 38Hz-500Hz
  • Power Handling: 350 Watts
  • Sensitivity: 90 dB @ 1W/1M
  • Impedance: 4 Ohms
  • Inputs: Spring Binding Posts
  • Install-friendly Dog Ear Installation Brackets
  • Cut-Out Template for Easy Installation
  • Paintable Grille Included
  • Sold As: Single
  • Mounting Depth (Assuming .5" Drywall): 3.56"
  • Unit Dimensions: (L x H x D) 11.43" x 18.43" x 4"
  • Cutout Dimensions: (L x H) 10.25" x 17.75"
  • Weight: 11 lbs
  • Warranty: 10 Years
  • *Note: Requires Additional Subwoofer Amplifier
31 Questions asked
Have a Questions?

What's on your mind?

Joe • 12/17/2019, 2:17:43 PM What type of amp is recommended for this subwoofer???
Customer Service • 12/17/2019, 2:17:43 PM
Hi Joe: The best Amp for the job is our OSD SMP250 (MI-3) dedicated Subwoofer Amplifier. It features 150 watts (Mono). It also features front panel controls, Phase switch, Frequency Control Knob (35 Hz to 180 Hz) and Volume control. Plus Three turn-on options; Music sensing, Manually switched or 12 volt trigger TL
nim • 12/17/2019, 2:17:43 PM does this include a paintable grill cover?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Mim: Yes all of our speakers have paint able Grills and Frames. And the paint shield is included with this speaker as well. TL
nim • 12/17/2019, 2:17:43 PM i am building a home and looking for a pre-construction bracket for this item. I don't see one so how is is mounted?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Nim: As you can see from the images on the product page the IWS-88 features an eight leg Dog Ear mounting system. It mounts securely to the sheet-rock after the cut-out hole has been made and the speaker has been dropped into the hole. We do recommend you create an enclosure behind the speaker in the stud bay. I am assuming since you are inquiring about a new construction bracket you will have access to the wall before the sheet-rock has gone up. We recommend adding a (2) 2x4 piece of stud material roughly 24 inches apart one above and one below where the speaker will be centered. Then you would add a 1/4 board to run between the two studs running vertically and the two pieces you have added above and below. So 24 " tall and 14 to 15 inches based upon the actual measurement between the two vertical studs. Then add a little silicon applied along the seams of the 1/4" backboard and the studs before you install the Sheet-rock and cutout your hole. There is a cutout template that doubles as a paint shield that you use to mark your hole. Lastly you will want to stuff the cavity with some fiber fill like you find at a bedding or hardware store. TL
Nimish • 12/17/2019, 2:17:43 PM Do you have a spec sheet on this speaker?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Nim: We will need to create a spec sheet for this speaker which will post on the product page. Please stand by... TL
Daniel • 12/17/2019, 2:17:43 PM Which one would be more ideal in a HT setup .... IWS-88 or IWS-10?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Daniel, The IWS-8 in-wall subwoofer has more cone space than the IWS10; however, the IWS10 has a lower frequency response than IWS-8. As you can see, there are unique pros to each subwoofer. CL/MA 1620