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SKU: SL800D In-Wall Dual Drive Passive Subwoofer with Sealed Enclosure, 8" and 10" Woofers - SL800D

Purchase In-Wall Dual Drive Passive Subwoofer with Sealed Enclosure, 8" and 10" Woofers - SL800D
  • SKU: SL800D sl800d-in-wall-subwoofer

    In-Wall Dual Drive Passive Subwoofer with Sealed Enclosure, 8" and 10" Woofers - SL800D

  • $299.99

    Compare at: $449.99 You Save $150.00

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Our SL800D is a passive in-wall subwoofer with an 8' polypropylene woofer and a 10" passive radiator to give you the richest low frequency response (bass) in the most compact package. This slim in-wall sub fills in the low notes missing from your movies and music and enhances overall sound quality without taking up any of your floor space. The SL800D includes the active 8' polypropylene woofer that produce clear, full bass tones while a 10' passive radiator enhances frequency response and gives you the most distortion-free sound. The SL800D is capable of handling up to 300 Watts of power so it can be paired with a robust amplifier. The perfect DIY weekend project, this in-wall sub has a paintable frame and grille to blend into any room.

  • Fills in LFE missing from your home theater or audio system 
  • 300W power handling for big bass sound in a compact package 
  • Polypropylene woofer for excellent low frequencies 
  • Passive radiator design for low vibration and distortion 
  • Easy to install with included template 
  • Paintable frame and grille blends in any room
Advantages of Passive Radiator Technology
The SL800D incorporates a passive radiator that offers advantages over ported designed speakers. A speaker with a passive radiator increases the low frequency response by absorbing the woofer's energy and reducing its motion (and vibration). Passive radiator speakers can be designed in a smaller enclosure, which is ideal for in-wall applications where space is limited, and vibration must be controlled.

Do I Need a Subwoofer Amplifier?
Yes! The SL800D is a passive subwoofer and needs a subwoofer amplifier to power it. An ideal match is our SMP-300 which is rated at 500W peak power and 250W continuous RMS.

Warning: California's Proposition 65


This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

  • Speaker Type: 8" In-Wall Subwoofer
  • Woofer: 8" Polypropylene
  • Passive Radiator: 10"
  • Frequency Response: 40Hz - 500Hz
  • Power Handling: 300 Watts
  • Impedance: 8 Ohms
  • Inputs: Spring Binding Posts
  • Cut-Out Template for Easy Installation
  • Paintable Grille & Frame Included
  • Tuned Sealed Cabinet
  • Sold As: Single
  • Mounting Depth (Assuming .5" Drywall): 3.9"
  • Unit Dimensions: (L x H x D) 22" x 17.5" x 4.3"
  • Cutout Dimensions: (L x H) 20" x 14.5"
  • Weight: 23 lbs
  • Warranty: 10 Years
  • *Note: Requires Additional Subwoofer Amplifier
7 Questions asked
Have a Questions?

What's on your mind?

Terry • 12/17/2019, 2:17:43 PM What is the power source?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Terry: This is a passive subwoofer that you need to add a dedicated Subwoofer Amplifier like our SMP250. It is rated at 8 ohms. We did have an SMP100 in stock (but maybe a little underpowered). The SMP250 has been discontinued but will be replaced in the coming months. Stay tuned. TL/5252
Doc • 12/17/2019, 2:17:43 PM Is this can be use as car subwoofer? Which amplifier support with car battery?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Doc: Most Car Audio Subwoofers are either 2 or 4 ohms. The SL800D is an 8-ohm subwoofer. There are many Car Audio Subwoofer amplifiers rated at 2 to 4 ohm that are very good. If you connect the 4-ohm amp to a single SL800D, you will cut the output of the amp in half. If you can add 2 of the SL800D and wire in parallel, then you would get the 4-ohm rated output. Good luck TL/5254
emerson • 12/17/2019, 2:17:43 PM what amp do you recommend for this sub ?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Emerson: The best Subwoofer Amplifier we have is the SMP500 which provides plenty of power and a unique DSP circuit (Digital Sound Processed). It also has a Remote Control. Als, the beauty is that the SMP500 will drive two of the SL800D for optimum coverage for Home Theater as well as 2.2 channel setup. It will do a 4-ohm load which you get when wiring two 8 ohm subs in parallel. Good choice TL/5311
Jeff • 12/17/2019, 2:17:43 PM Will this sub woofer fit in a 2x4 wall with 1/2" drywall
Customer Service • 12/17/2019, 2:17:43 PM
Hi Jeff: The actual measurement from the inside of the frame to the back of the enclosure is 3 15/16th depth so it will fit into a stud bay when you add the 1/2 inch of sheetrock. TL/5412
Jeff • 12/17/2019, 2:17:43 PM Will this sub woofer fit in a 2x4 wall with 1/2" drywall
Customer Service • 12/17/2019, 2:17:43 PM
HI Jeff: The dimensions say 4.3" depth. Typical stud bay is 3.5" inside plus the 1/2" of the sheetrock which would leave 0.3". I can verify with the office but you might have to add a 3/8" spacer to make it work