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Home / Product Category / SPEAKERS / Subwoofers / Outdoor Subwoofers / OSD In-Ground 8" 500W Outdoor Underground Burial Rated Subwoofer GLS8 Green

OSD In-Ground 8" 500W Outdoor Underground Burial Rated Subwoofer GLS8 Green

Product code: GLS8

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OSD Price: $199.95
Compare at: $449.00 You Save: $249.05 (55%)
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Features & Specifications

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 LS2 landscape satellite speakers. Create an unobtrusive stealthy outdoor sound system. Additional system configurations can be created for up to 8 pairs of speakers using multichannel amplifiers and or series parallel wiring.

• 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 LS2 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.



  View Owner's Manual          


6 Questions & 6 Answers
from Florida asked:
September 10, 2018
My yard is 41’ d x 50’ wide, I have 6 pairs of LS3 speakers, I was thinking of adding 2 of the GLS8 subwoofers in each of the rear corners of my yard. Would this be enough to notice throughout the yard as far as the bass goes ?
1 Answer
Hi Rob: It sounds good, but what else are you not telling me. What is powering all of this, are you using volume controls, speaker selector and dedicated power amplifier? I would love to learn more maybe see a drawing of your outdoor area including dimensions. Maybe even include a few images of your yard? TL/5201
Tim Leahy
on September 12, 2018

chad p
from KS asked:
June 2, 2018
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?
1 Answer
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
Tim Leahy
on June 4, 2018

from Atlanta, GA asked:
April 23, 2018
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.
1 Answer
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
Tim Leahy
on April 27, 2018

from OK asked:
April 16, 2018
Would it be better to buy two of the small green subwoofers or 1 of these. Witch sound better
1 Answer
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
Tim Leahy
on April 17, 2018

from Whittier, Ca asked:
March 29, 2018
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)?...
1 Answer
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
Tim Leahy
on April 15, 2018

Kent johnson
from OK asked:
March 24, 2018
What subwoofer sounds the best for the money. Looking for deep bass.
1 Answer
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
Tim Leahy
on April 5, 2018

Product Reviews

1 Reviews
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100% Recommend this product (1 of 1 responses)
By Bill Fairman
March 23, 2018
Well built and sounds good too
Can't beat the price for this in-ground subwoofer, easy to assemble (you're just adding the tube and connecting the speaker wire). The sound is good as well, I have it under a two-tier deck and connected the OSD Audio SMP250 Mono High Current Class A/B Subwoofer Amplifier. I highly recommend.