Mobile Navigation
My Account


Call for Support

Outdoor Speaker Rock OSD Audio RS850TT

Product code: OSD-RS850TT

Out of Stock
Free Shipping
OSD Price: $149.99
Compare at: $499.95 You Save: $349.96 (70%)
Sold in single 1 = 1pc
This item is so popular, it is currently out of stock. But don’t worry, we’ll send an email letting you know when it’s back in!
Discontinued - No Longer Available
30-Day Money Back Guarantee

Features & Specifications

The RS850TT is one of our most powerful rock speakers. Sold as a single speaker, this beefy rock uses dual voice coils and a large 8-inch woofer and will cover large backyard and pool areas. With power handling from 15W to 400W, the RS850TT is extremely sturdy, weather-resistant, and blends easily into the most meticulous yards and gardens. Advanced features include separate dual tweeters mounted at 18° angles for optimum stereo sound dispersion and an injection-molded, carbon fiber filled, polypropylene woofer cone, which is extremely rigid for tight bass response and extremely low distortion.


Separate dual tweeters mounted at 18° angles for optimum stereo sound dispersion

8" injection-molded, carbon fiber filled, polypropylene woofer cone

Extremely tight bass response and low distortion

What Is a Dual Voice Coil Rock Speaker?
A Dual Voice Coil (DVC) Speaker uses a special voice coil cone design that allows both channels of a stereo system to drive one cone. Sounds complicated but it's really not. A DVC speaker plays both right and left channels through one speaker cone. You get both channels but without the acoustic separation that happens with two speakers. DVC rock speakers allow more placement flexibility in areas that can’t accommodate multiple speakers in the same location.

To improve longevity of the surface quality on our outdoor speakers, place the rocks in a shaded area to prevent color fade from too much direct sunlight. It is recommended to keep our outdoor speakers out of contact with any chemicals that may be present in your yard. We encourage you to bring the speakers indoors or cover them up during the off seasons to ensure a longer life for the speaker


Other Product Info

Dual voice coils deliver both left and right channels from one weatherproof rock speaker. Separate dual tweeters mounted at 18° angles for optimum stereo sound dispersion. Includes an 8" injection-molded, carbon fiber filled, polypropylene woofer cone, which is extremely rigid for tight bass, reduced breakup and lowered distortion. Butyl rubber cone surround damps resonance and provides exceptional durability. The speaker-forward design positions the speaker close to the grille ensuring an accurate mid-range. Dual 1" Tri-laminate domes with fluid-cooling & ultra-wide dispersion provides for clear and detailed high-frequencies.



  View Owner's Manual          


5 Questions & 7 Answers
from Wesport, CT asked:
July 8, 2014
When will you be getting more of the RS850TT "Granite" speakers in? I've been looking for the last few weeks.
1 Answer
Hi Clayton, I don't believe we will be getting the granite back in-stock. The brown can be painted however.
Customer Service - Q&A
on July 14, 2014

from Tamaqua PA asked:
March 8, 2013
I will be ordering the rock speaker RS850TT. (maybe 2 of them) and I will be running app. 50 to 75 feet of buried wire to each. Which type of speaker wire should I purchase? Do I need 4 conductor type?
2 Answers
Jon, The Dual Voice Coil RS850TT Rock Speaker takes a 4-conductor speaker cable. We recommend using a 16-4 or your application. Look at our Aqua Blue direct burial connectors to terminate the speakers. You will need 8 total for your application. The connectors feature a silicon internally and are very effective. CL/MA/TL 1686
Customer Service - Q&A
on March 8, 2013
Hi Jon: Look at our Aqua Blue direct burial connectors to terminate the speakers. You will need 8 total for your application. The connectors feature a silicon internally and are very effective. TL
Customer Service - Q&A
on March 11, 2013

from Phoenix asked:
November 17, 2012
What do the rs850 look like? You have photo 4 which is darker and the rest look like a lighter tan.
1 Answer
Hi Tim, Looks like the lighting on the first image is a little deceiving. The last image where both Granite Grey and Sandstone Brown are pictured is most accurate and true to color. I hope that helps! CL 1384
Customer Service - Q&A
on November 19, 2012

from Charlotte, NC asked:
November 5, 2012
Reading another question it seems that this speaker has four input wires for both left and rights pairs. Can I use two of these speakers, one for left, one for right? If so, exactly how would these be wired?
2 Answers
Hi Jeff, This RS850TT a single stereo speaker with two tweeters: one is for your left channel and one for your right channel. You can certainly hook up just one channel but we recommend going with two RS810's instead. CL 1363
Customer Service - Q&A
on November 6, 2012
Customer Service - Q&A
on November 6, 2012

from Roseville, MN asked:
November 18, 2011
do you run both right and left channel wires to the one speaker?
1 Answer
Tom, Yes this takes a 4 conductor wire so your left and right channel would be into the RS850TT CL
Customer Service - Q&A
on November 18, 2011

Product Reviews

16 Reviews
94% (15)
0% (0)
6% (1)
0% (0)
0% (0)
56% Recommend this product (9 of 16 responses)
By Rink
Windermere, FL
May 4, 2013
Buy these!
These speakers are as advertised, maybe even better! They are beautiful so they blend into our garden, the sound is pure and we have to dial back the volume so we don't annoy our neighbors - these things can blow you away. Love them, strongly recommend.
ProsVery real looking in garden, pure sound.
ConsLarge, they can look huge if not in the right location.
By Gary
Suwanee, GA
May 3, 2014
Great while it lasted
I have two of these and while they sounded pretty good, one of them failed after just a year and a half. I moved one of the two while working in the yard (it had not been touched since installation) and it was full of water. The second one was still dry and working well. I contacted support and was told I was out of my warranty period of one year. I have a total of 6 speakers outside, 2 Polk Audio speakers which have been out in the elements for 6 years and are dry and work perfectly. The other two are OSD Audio AP550TT, which are under the eaves and don't get too wet. Water filled speaker video:
ProsStereo speaker which is ideal for outdoor use, sound good, good bass response in open space.
ConsWas not weather resistant and filled with water.
Best UsesIndoors or covered locations
By Gerardo Davila
Mexico, Baja California Sur
December 30, 2013
saludos cuanto seria con envio a Baja Califoria Sur, Los Cabos, Mexico de 2 Bocinas Tipo Roca
By Paul Pierret
Sioux FAlls,SD
October 14, 2013
This Rock Rocks
Perfect for outdoor patio great sound and looks great.
By Richard a Bliss
July 20, 2013
An excellent product for the money
The speaker performed as represented and the service was great. I would buy from OSD again.
Fresno, CA
April 17, 2013
As solid as a rock
I ordered RS850TT Reference 8" rock speaker from OSD. Two days later it arrived via mail. I was immediately impressed by how well it was built. This speaker is as solid as a rock; it is built to last. Once I installed it outdoors and cranked it up, I could not believe how much better my music sounded. Thank you OSD for producing an affordable, high quality rock speaker.
By My Guy
September 29, 2012
Best Looking Rock
Fantastic product! I have received and worked with many rocks recently. This rock definitely LOOKS the best. There are so many rocks to choose from and many of them look terrible... but this guy and others from OSD are killer! Not to mention, the sound is fantastic too!
ProsGreat Sound Quality, Easy To Set Up, Attractive Design
Best UsesBasic Systems, Multiple Rooms / Whole House, Smaller Rooms, Outdoors, Home
By Ian T
Laguna Niguel, CA
April 30, 2012
Awesome Bass and Volume
I combines 3 rock speakers and 1 AP550TT speaker, along with the AMP300 and OVC300 outdoor volume controls, to control each independently. Being a Bass guitarist, I wanted to hear the bass and now I do... and so do all my neighbors. :o) I am blown away by the quality of the sound and cannot praise the customer service and support enough for their help when I had questions.
ProsGreat Sound Quality, Easy To Set Up, Easy to Mount, Good Power Output, Attractive Design
Best UsesOutdoors
By Just an old Montana Guy
Temecula, CA
January 16, 2012
Look Like Rocks - Play Amazing Sound
Have three in the back yard around the pool. Amazing sound and they blend into the color schemes really well.
ProsGreat Sound Quality, Attractive Design
Best UsesOutdoors
By LJ Keenan
January 2, 2012
Great sounding outdoor speaker
Purchased as a Christmas gift for my husband. He was pleasantly surprised and eager to hook them up. We have a large outdoor pond and we hid them among the greenery. Looks great and he was very pleased with the sound.Plenty of base and very clear. Thanks everyone for YOUR reviews because I would have bought a cheaper pair elsewhere and would not have been satisfied.
ProsGood Power Output, Attractive Design, Great Sound Quality
Best UsesLarger Rooms, Outdoors, Home Theater, Home
By Philip
Long Island, NY
August 10, 2010
This is my second ...
This is my second purchase from OSD. Couldn't be more pleased. Very well built, sound is excellent. I am running it off of my Denon DRA-697ci with outstanding results. I am so pleased I will probably purcase more, along with a speaker selector and some volume controls. My AP850's (purchased over 2 years ago) still sound amazing, and I still get lots of complments on them.
By Anonymous
Central, GA
August 8, 2010
I don't normally write ...
I don't normally write recommendations. But, let me assure anyone shopping that these speakers will surpass many Bose speakers. I first heard this claim from another reviewer. I purchased one and set it in my living room for a week and turned of my Bose speakers all together. The audio surpassed my Bose 301's. I now have two of these custom wired into my main receivers inside our house. The audio output is very nice and surrounding outdoors with no complaints for highs or lows. I would recommend spending a few dollars extra and getting the AP850, you are not likely to be disappointed.
By Steve
St Augustin, FL
May 26, 2010
Before I bought the ...
Before I bought the RS850TT stero rock speaker, I listened and compare it with Niles stereo rock speaker at a local store. Niles sounds very good indoors, but when you take it outdoors it lost its clarity, you can't hear any mid range at all! The RS8500TT sounds perfectly outdoors, the bass has a nice damping effect, the mids and highs are very smooth and clean. Overall love this speaker and price.
By John
Kingston PA
April 25, 2010
A couple words describe ...
A couple words describe these speakers. Quality,crisp clear sound,awesome bass response,and better than bose, jbl, harmon kardon polk, or infinity outdoor speakers.
By Dave
May 23, 2009
O.M.G. this speaker is ...
O.M.G. this speaker is the best. I was a little hesitant, because it is much cheaper than Niles rock speaker, WOW so much for your money. I would recomend these to anyone.
By Tim
February 10, 2009
Bass response is ...
Bass response is phenomenal, driving it using the OSD MI6 amps, very good clarity. My Neighbor has Niles RS8SI which she paid for over $400, and mine is just good as hers.