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Home / Product Category / SPEAKERS / In Wall Speakers / In Wall Subwoofers / SL800D In-Wall Dual Drive Subwoofer with Sealed Enclosure, 8" Woofers and 10” Radiator, includes White Paintable Magnetic Grill, 300W, 8Ω

SL800D In-Wall Dual Drive Subwoofer with Sealed Enclosure, 8" Woofers and 10” Radiator, includes White Paintable Magnetic Grill, 300W, 8Ω

Product code: SL800D

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OSD Price: $219.99
Compare at: $299.99 You Save: $80.00 (27%)
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Features & Specifications

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.

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.


  • 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

  • Specifications


      View Owner's Manual          


    6 Questions & 7 Answers
    from California asked:
    December 14, 2019
    Which  subwoofer  would sound better outside , i want to place it outside patio , in the ceiling 
    1 Answer
    Hi Rick:

    SL800D is your best choice for your application; I am just hoping the Joists spacing is like their in-wall counterparts (the  2 x 4 Studs).


    Submitted by: Tim Leahy on December 18, 2019

    from California, asked:
    December 14, 2019
    Can I put the the subwoofer in the ceiling. Outside patio.   
    1 Answer
    Hi Rick:

    The same answer as the first one, the sub will work as long as you have the joists available that are the same dimensions as the studs in the wall. The SL800D is rated down to 40Hz. That is our lowest rated subwoofer for outdoor in-wall/in-ceiling use. Our subwoofer power amplifiers are rated at 4-ohms so they will drive two SL88D with the one amp. Like our dedicated Suwoofer Amplifiers the  SMP300 or SMP500 with DSP circuit.


    Submitted by: Tim Leahy on December 18, 2019

    from Pittsburgh asked:
    February 14, 2019
    Will this sub woofer fit in a 2x4 wall with 1/2" drywall
    2 Answers
    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
    Submitted by: Tim Leahy on February 15, 2019
    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
    Submitted by: Tim Leahy on February 15, 2019

    from Newyork, NY asked:
    December 1, 2018
    what amp do you recommend for this sub ?
    1 Answer
    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
    Submitted by: Tim Leahy on December 6, 2018

    from asked:
    October 18, 2018
    Is this can be use as car subwoofer? Which amplifier support with car battery?
    1 Answer
    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
    Submitted by: Tim Leahy on October 19, 2018

    from 38139 asked:
    October 18, 2018
    What is the power source?
    1 Answer
    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
    Submitted by: Tim Leahy on October 19, 2018

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