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Bose Free Space 51 Outdoor In-Ground Speakers (Green)

4.7 out of 5 stars 67 customer reviews
| 58 answered questions

Price: $449.00 & FREE Shipping. Details
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Ships from and sold by Amazon.com.
  • Downward firing 4-1/4 full range driver
  • Innovative radial design disperse sound in a 360 degree pattern
  • Rugged, flexible design withstands temperatures from -40 to +150 degrees Fahrenheit, and passed the rigorous salt fog test 66% longer than required by the Marine Industry Standard
  • Recommended power - 10 - 100 watts
  • Base flange with mounting holes for easy installation
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Technical Details

  • Brand Name: Bose
  • Model Number: 31763
  • Color: Green
  • Speaker Type: Outdoor
  • Speaker Amplification Type: Passive
See more technical details

Compare to Similar Items


This item: Bose Free Space 51 Outdoor In-Ground Speakers (Green)
Niles GSS10 Speaker B007T5YV0Y
Customer Rating 4 out of 5 stars (67) 4 out of 5 stars (70) 4 out of 5 stars (14) 3 out of 5 stars (16)
Price $449.00 $90.99 $479.99 $108.50
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com
Color Green Green Black Green
Dimensions 16.02 inches x 29.13 inches x 15.94 inches 9.25 inches x 8.39 inches x 8.39 inches 28.5 inches x 27.75 inches x 16.25 inches 13.1 inches x 13.6 inches x 13.1 inches
Item Weight 22 pounds 4.5 pounds 25 pounds 9.8 pounds
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Product Description

Enjoy outstanding audio inside or outside with these Bose® Free Space® 51 environmental speakers. The rugged speakers feature an innovative circular design that radiates sound out in a 360° pattern. Features: durable, flexible design that withstands temperatures from -40° to 150°F and passed a rigorous salt fog test 66% longer than required by the Marine Industry Standard; mounts to your deck or can be put in ground; reproduces low frequency notes for an impactful experience; recommended power of 10-100 watts; base flange with mounting holes for easy installation and a textured green enclosure.

Product Information

Product Dimensions 29.1 x 15.9 x 16 inches
Item Weight 22 pounds
Shipping Weight 22.1 pounds (View shipping rates and policies)
Manufacturer BOSE
ASIN B00009B8H6
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Shipping Advisory This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
Item model number 31763
Customer Reviews
4.7 out of 5 stars 67 customer reviews

4.7 out of 5 stars
Best Sellers Rank #11 in Electronics > Home Audio & Theater > Speakers > Outdoor Speakers
Date first available at Amazon.com November 22, 2004

Technical Specification

Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF ]

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Customer Reviews

Top Customer Reviews

These top of the line speakers are worth all the money! If you are hesitant purchasing then because of the price, don't be! The Free space 51's are the best in-ground speakers I have heard and have survived all sorts of horrible weather. BUY NOW! YOU WON'T REGRET IT!

Edit: At the time of writing my original comment, the BOSE Freespace 51's were the best in-ground speakers I had heard, and I was convinced that only a speaker with a huge price tag like this one was capable of producing such clear sound. However, after hearing the TIC GS-3 Omni Speaker recently, I honestly could not hear a difference in sound quality between it and the super expensive BOSE model! So while these speakers do sound great, I would recommend that you save your money and purchase the TIC GS-3's!
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I have had a set of these Bose speakers in my patio for 7 years now, and they are still as awesome as they were when I installed them. They provide excellent sound quality, even when playing compressed audio formats. They also provide stereo imaging that rivals that of premium indoor speakers (I have considered getting some sets of these to use with the surround sound in my living room).
The weather has had very little effect on these speakers over the years, they are slightly faded, and that's about the only sign of age that they show.
Another wonderful quality of these speakers; is that they are non-directional. Which means that unlike most speakers, you DO NOT have to be in a specific location to hear good quality sound.
So if you are looking for great sounding outdoor speakers, these are simply the best one's available.
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Verified Purchase
I made the mistake of buying a " knock off" to save a few bucks....they sounded decent but only lasted about a year...

If you are considering anything less than these BOSE ......Learn from my mistake....spend the money....they are far superior to any other speaker of this type.
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I have 2 sets of Bose outdoor speakers - One set under a veranda roof and these out by my pool. These are the best you can get if you need something that will be integrated in landscaping, etc. If you can place the speakers under cover or attach them to your house I would recommend the other Bose outdoor speakers.
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I installed these five years ago and they still look and sound great. I placed mine in my flower gardens so they would be covered during the summer, and they still sound great. With the 360 degree sound my neighbors and friends are amazed when they find out where sound is coming from. I could have paid less for other speakers, but I am very happy with these and expect years of satisfaction.

Update June 3, 2014.. Even after our record cold and snow this winter (Chicago area), the speakers were buried under snow from mid December to early March, the speakers still sound great. 8 years and counting.
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I did a lot of research on in-ground speakers. I am a fan of Bose - ear buds, noise reducing over the ear headphones, SoundDock. My wife convinced me to go ahead and buy these speakers. The first set arrived broken. No worries, Amazon immediately sent another set. Second set arrived in perfect shape. I placed them in the ground in our backyard back last September. It snows here in Colorado and gets cold. I left them in the ground because they advertise they can handle it; hey you see them at outdoor malls everywhere. I have them hooked up to a Onkyo receiver (it too survived the winter, another review) with JSC 14 AWG underground wire. I've played this system every month since installation ( a little less during the snowy times). Out back today while smoking a Boston Butt they sounded just as clean and clear as they did last September. So far, so good, will update as time goes by. You get what you pay for - they may be expensive, but they sound awesome. Pics are of one speaker and the Onkyo receiver inside table under the green flower pot...
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Verified Purchase
I have been looking at Bose Free Space 51 Outdoor In -Ground Speakers for about three or four years. I thought they were a little pricey, but I have never questioned the quality of the product.
I received speakers about two weeks ago, I have not regret one dollar yet!
"Outstanding"
Thank you!!
A E Benjamin
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Verified Purchase
I bought these and paired them with a set of Bose Environmental 251 speakers, a Bose SoundTouch SA-5 amp, and a Niles GSS10 subwoofer. My backyard rocks! The system sounds great around the pool and has plenty of power to irritate the neighbors. I definitely recommend a subwoofer - it makes a world of difference. These speakers are loud, clear, and super easy to install. I highly recommend them!
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