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    SKU: GLS8

    OSD GLS88" In-Ground Subwoofer 500W 360° Omni-directional Outdoor Burial Rated, Green

    Purchase OSD GLS8 8" In-Ground Subwoofer 500W 360° Omni-directional Outdoor Burial Rated, Green
    • Outdoor Speaker Depot SKU: GLS8 gls8-inground-outdoor-subwoofer
    • In Stock


      Compare at: $359.99
      You Save: $120

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    Get ready to rumble bring your landscape to life with our powerful GLS8 In-Ground Subwoofer. To immerse yourself in music’s lowest tones while enjoying your outdoor retreat, OSD Audio offers the GLS8 in-ground subwoofer. Since the bulk of the subwoofer is buried underground, only the port needs to appear to the outside world. But just because you can’t see it doesn’t mean you won’t know it’s there. The subterranean design brings bold, deep bass and full-range audio to backyards of any size.For optimum outdoor performance combine the GLS8 with our LS3 landscape satellite speakers. Create an unobtrusive stealthy outdoor sound system. 

    • Buried subwoofer cabinet disappears into the landscape.
    • Exposed vent can be primed and painted to blend into its surroundings.
    • At less than 20 inches long, you can enjoy big sound with a small footprint.
    • Easily expand your system with our compatible LS3 landscape satellite speakers.

    Installation Tips:
    • For the best quality sound place the subwoofer within 20 feet of the general listing area.
    • Ensure the hooded output vent is away from the direct spray of sprinklers.
    • Before burying the sub, put gravel at the bottom of the hole for drainage and leveling.

    Why Add an Outdoor Subwoofer?
    Most outdoor speakers are not designed to cover lower frequencies so adding a subwoofer to a backyard audio system can make a huge difference in the quality of sound you experience. If you have outdoor speakers in your patio or backyard, you’re hearing mid and high frequencies and some bass so adding an outdoor subwoofer not only delivers missing bass notes, but also takes the low-frequency burden off the other speakers which will optimize your entire system.

    Do I Need a Subwoofer Amplifier?
    Yes! The GLS8 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 vinyl chloride, which is known to the State of California to cause cancer. For more information, go to

    • Speaker Type: 8" Burial Rated In-Ground Outdoor Subwoofer
    • Woofer: 8" Polypropylene Cone with Rubber Surround
    • Frequency Response: 28Hz-200Hz
    • Power Handling: 500 Watts
    • Sensitivity: 84 dB
    • Impedance: 8 Ohms
    • 360° Omni-directional
    • Weatherproof Impact Resistant Cabinetry
    • Exposed Vent can be Primed and Painted to Blend into its Surroundings
    • Sold As: Single
    • Unit Dimensions: (L x H x D) 19.75" x 28" x 15.5"
    • Weight: 32 lbs
    • Warranty: 1 Year
    15 Questions asked
    Have a Questions?

    What's on your mind?

    Kent johnson • 12/17/2019, 2:17:43 PM What subwoofer sounds the best for the money. Looking for deep bass.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Kent: 2 heads are better than one, the same with sub woofers. Check out our SAM300 Black Series Subwoofer amplifier to drive 2 subs with the single amp. It is rated at 4 ohms so will drive the 2 subs. The SAM300 is featured on the OSD Premium web site. You will need to call for price. TL/4861
    Paco • 12/17/2019, 2:17:43 PM i purchased 3 pairs of the ls2 speakers and a nero xd. every thing is working great but i need a little more kick. will the osd in-ground 8" 500w sub work with my set up? how would i hook it up(LT. Channel or RT channel or to the sub out)?...
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Paco: First thing the NERO is 4 ohm stable so should only have a maximum of two pair of 8 ohm speakers. If you are powering 3 pair of the LS-2 in parallel there maybe a problem where you can damage your NERO. What you might consider is adding a fourth pair of LS-2 (for more coverage) and wire the 8 speakers in series parallel configuration 4 speakers for the right and four speakers for the left. I can send you a wiring diagram so you have an 8 ohm load. there are a couple of options for your sub. If you add the GLS8 you will need an additonal dedicated power amplifier like our SMP250 to connect to the Sub out of the NERO and then connect directly to the GLS8. Another option is adding a OM SUB200 and connect to the speaker outputs to the NERO. And then connect the 8 speakers to the output of the OMSUB 200. and between the 8 ohm rating of the 2 sets of 4 speakers wired in series parallel (now 8 ohm) and the 8
    Alana • 12/17/2019, 2:17:43 PM Would it be better to buy two of the small green subwoofers or 1 of these. Witch sound better
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Alana: That is a loaded question, what else are you planning to purchase for speakers? That would help depending on how much area you are covering. In the outdoors usually more is better... TL/4914
    Jason • 12/17/2019, 2:17:43 PM I am debating between this and the RSUB300 for our pool in the backyard. Does one provide more kick or better performance than the other or is it simply a matter of buried vs above ground? This would be paired with a pair of AP850's on a Denon 3805.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Jason: The RS Sub has been around a while longer. It comes down to personal; preference on your layout. The RSUD300 goes a little lower with its 10" passive radiator 20Hz vs 28Hz. Plus the sensitivity matches the AP850, 90 dB (vs 84 dB) which means it is more efficient and does not take as much power to get it pounding. Both, we would recommend adding the SMP250 dedicated sub amp to drive them. TL/4927
    chad p • 12/17/2019, 2:17:43 PM Most receivers have an RCA jack for "Sub Out", how do I make this work assuming it's not an RCA from the Sub side?
    Customer Service • 12/17/2019, 2:17:43 PM
    HI Chad: The GLS8 is a passive subwoofer that is rated to handle 500 Watts. It has a 2 conductor speaker wire that you connect to a dedicated subwoofer amplifier. The Subwoofer amplifier is connected to the Pre-amp output of the Receiver. This is a low-level connection before the signal is amplified by the dedicated Sub Amp before it is connected to a low (or speaker) level 2 conductor input on the GLS8. Most outdoor subs especially in-ground are passive subs that need a dedicated sub amp to drive them. I hope that helps... TL/5025