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Home / Product Category / SPEAKERS / Outdoor Speakers / Outdoor Rock Speakers / RX640 150W High Performance 6.5" Rock Speaker Pair Brown Grey Color

RX640 150W High Performance 6.5" Rock Speaker Pair Brown Grey Color

Product code: OSD-RX640

In Stock
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OSD Price: $89.99
Compare at: $199.95 You Save: $109.96 (55%)
Sold in pairs 1 = 1 pair
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Features & Specifications

Sold as pair, the RX640 is a very popular landscape rock speaker for backyards, pools and gardens. Part of the fun is disguising the speakers so choose a color that best matches your landscape and place the speakers where a natural rock would be found. Typical locations for the rock speakers include rock formations for barriers around pools, ponds and spas or bordering a garden and even as an accent in flower gardens.

You'll Enjoy Great Sound
Customers are always pleasantly surprised by the sound quality of our RX640s. The 6.5" polypropylene woofer and 1" dome tweeter are acoustically matched to give you clear vibrant sound with good bass characteristics. If you're worried about how long they will last, rest assured that this two-way (woofer and tweeter) rock speaker system utilizes weather-resistant components for years of trouble-free performance.

Will these speakers hold up during winter months?
OSD outdoor speakers are developed with harsh conditions of the outdoors in mind. Our rock speakers use only non-water-absorbing materials and won't absorb any water. This is critical in winter so it won't freeze and crack. The shape is designed to withstand large amounts of pressure, extreme temperatures and moisture. It's important that outdoor speakers are an investment, so take good care of them. Storing them away during extreme winter months will lengthen the time you will get enjoying outdoor speakers. These rock speakers utilize weather-resistant components for years of trouble free performance.

Can I connect my rock speakers to an iPod or other MP3 device?
This is a common question and the answer is yes. Keep in mind, however, that these speakers are passive devices, meaning they do not have a built-in amplifier. You’ll need to connect to an amplifier or a receiver to power your new rock speakers. Customers typically store an amp/receiver in a tool shed or even run the speaker wires back to a receiver in the house. From there, they simply use the AUX input or RCA adaptor cable to connect their iPod, iPhone or other player to the receiver or amp. OSD Audio carries all the cables you need, which are very inexpensive, and the speaker wire as well.

What kind of cable should I use?
If you plan on burying the the cable (and most people do), we strongly recommend using OSD direct burial cable and waterproof wire connectors. These speaker cables that can withstand extreme weather conditions like rain, snow and high temperatures and incorporate twice the insulation and a formulated white polyethylene jacket that is U/V resistant.

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

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The landscape rock speakers are designed to simulate natural rocks within your landscape. Place the Patio Tune Rock speakers anywhere that a natural rock would be found. Typical locations for the rock speakers are: rock formations for barriers around pools, ponds and spas or bordering a garden and even as an accent in flower gardens.
They have 150 watts of power for each. The specially constructed two-way rock speaker systems utilize weather resistant components for years of trouble free performance. The polypropylene woofer and stamped Aluminum tweeter are acoustically matched to give you clear vibrant sound with good bass characteristics.
Perfect for background music or public address. Commercial applications include almost every Theme Park, Zoo, Amusement Center, Leisure Area, Civic Center, Hotel Chain and Golf Course.



18 Questions & 18 Answers
from asked:
June 18, 2018
Can I connect these to a sonos connect amp with two existing speakers?
1 Answer
Hi Mike: That is a question for SONOS. My understanding is the SONOS Connect Amplifier is only meant to drive a single pair of 8-ohm speakers at a time in parallel (4-ohm load). We recommend and sell many of our AMP200 along with the SONOS Connect. The AMP200 is stable down to 2 -ohm which allows you to connect three pairs of 8-ohm speakers in parallel. Of course, it is a true High Current Power Amplifier that weighs 24 pounds and features automatic source switching and has speaker A and B connection. TL/5061
Tim Leahy
on June 18, 2018

from orlando, Florida asked:
May 30, 2018
can you pair multiple speakers. as in if I had 2 different pairs could I connect all 4 on the same device
1 Answer
Hi Carson: That is a loaded question which I would love to answer but I need a little bit more information about your layout. Is this just going to be two pairs of rock speakers? What is your source; Amplifier? Receiver etc.? Brand name and model numbers if you have them already. Contact me at tim@osdaudio> The simple answer is yes but there is a question regarding Impedance and matching the speakers to your Amplifier/Receiver. Let know more... TL/5014
Tim Leahy
on May 30, 2018

from Phoenix asked:
February 1, 2018
I have a pair of AP650’s being driven by an Amp120 outside right now that I purchased a few weeks ago. Can I add a pair of these rock speakers to the Amp120 or would I need to upgrade to an amp200?
1 Answer
HI Jason: If you are planning to add a second pair of speakers and hoping to play both at the same time you would definitely be better off purchasing the AMP200. You do have a 30 day performance guarantee on the AMP120 if you bought it directly from Outdoor Speaker Depot. You could exchange it and purchase the AMP200. If you purchased it directly from AMAZON they also have a 30 day return policy and you could return the unit and purchase a replacement from them.The upgrade to the AMP200 is a smart move. Note: Push the speaker A button in on the AMP120, then push the Speaker B button in, notice that the A button pops out. We do that to discourage playing both Speaker A and Speaker B at the same time. The AMP does 8 ohms or higher (16 ohms) but 2 pair in parallel produces a 4 ohm load which is not recommend for this AMP. You will also notice a difference after listening to the AMP200; no listening fatigue. TL/4779
Customer Service - Q&A
on February 4, 2018

from New York asked:
October 10, 2017
Would these be a good candidates to run as a satellites with the Sub200? Looks like the recommended RS660s are discontinued.
1 Answer
Hi Ryan: The RX640 will work perfectly with the OM SUB 200. TL/4587
Customer Service - Q&A
on October 12, 2017

Jon S
from Chicago IL asked:
May 22, 2017
I noticed that the speakers are rated at 150W. My Denon receiver is only 80w p/channel. Is that enough and if not what is the minimum that these speakers require to sound good?
1 Answer
Hi Jon: These speakers are typically rated at 10 to 150 watts. You will notice the sensitivity is 91 dB which means there are efficient and do not take a lot of power to make them work. They will be a perfect match for your Denon Receiver which like all Denon products are usually very good. TL/4380
Customer Service - Q&A
on May 24, 2017

from Toronto, Canada asked:
July 13, 2016
I lost my charger - how can I obtain another one?
1 Answer
Hi Ron: The RX640 are a pair of Passive Rock Speakers that do not have or need a power Supply. What speakers do you have that need a power supply? We do have replacement Power Supplies for our Powered Bluetooth Speakers. TL/3982
Customer Service - Q&A
on July 14, 2016

from Conroe, TX asked:
April 19, 2016
I have two pair of these I would like to connect to a Pyle PT390BTU receiver which is rated at 8 ohms and 300 watts. It has 4 speaker terminals and they do state that it will run 4 speakers. I just want to make sure that this setup will work fine without having to use a speaker selector with impedance matching/limiting. Thanks.
1 Answer
Hi Brad: The combination should be fine. No need for Speaker Selector or Volume Controls. It is curious that they do not have away to switch between A or B speaker output. Most receivers will have speaker A or Speaker B or Both as options. Nice pre amp selection including Bluetooth. Good choice TL/3822
Customer Service - Q&A
on April 19, 2016

from TX asked:
November 29, 2015
Are they wireless?
1 Answer
Hi Donna, No - these speakers require to be wired to an amplifier or receiver. We do have Bluetooth Wireless rock speakers that can run off a smartphone or tablet.
Customer Service - Q&A
on December 14, 2015

from Long Island asked:
June 14, 2015
I would be connecting a pair of these as well as a pair of Outdoor Speaker Pair Patio OSD Audio AP650 to a shared channel of a Sonance 3 channel 260 W per channel amp. Would that be appropriate power/sound wise?
1 Answer
HI Paul, Does it put out 260 wpc at 8ohm or 4ohm? If running both pairs off the same output, then you would be running a 4ohm load, which would generate more wpc than an 8ohm load would and may not even be possible with your receiver. Check your receiver specs in the owner's manual or online and see if that's possible to run a 4ohm load and how many watts per channel it pushes at 4ohms.
Customer Service - Q&A
on June 16, 2015

from pennsylvania asked:
June 9, 2014
Do you have to run a separate wire from the source to each of the speakers or can you run the wire to the first speaker and then a wire from the first speaker to the second speaker?
1 Answer
Hi Jan, It's best to run a separate wire from each channel on the receiver, otherwise you will not get stereo sound. Also, if you try daisy chaining one speaker off the other, that will drop the load down and may not be stable for the amp/receiver to handle. BM 2740
Customer Service - Q&A
on June 9, 2014

from bridgewaterma. asked:
April 3, 2014
How many watts can the RX640 handle?
1 Answer
Hi Robert, The RX640 can handle a max of 150 watts peak, so you should give it around 60-100 watts for optimal sound. -BM 2593
Customer Service - Q&A
on April 3, 2014

from MA asked:
March 9, 2014
Dear OSD, , I have a 10-yr old Sony Receiver -- it is 5.1 channels (surround). The A/B switch only allows for 2 connections for each. If I wanted to buy 4 speakers could I use the 5.1 connections so that they all play the same source? Please advise. Many thanks, Mike
1 Answer
Hi Mike, Are you saying that you aren't utilizing the 5.1 for surround sound and are wondering if you can run a pair of speakers off one of the surround outputs? If so, you can do that, but it would probably be limited to surround mode, meaning you would not be hearing stereo out of those speakers, unless your AV receiver can switch to stereo mode. -BM 2526
Customer Service - Q&A
on March 10, 2014

from cairo.egypt asked:
August 11, 2013
I had 4 pairs of RX640 rock speakers. Is RX-5502 stereo receiver able to handle these speakers?
1 Answer
Hi Nooh: The RX-5502 is not Multi-Voltage so it will not work in Egypt. You would be better off using something like our AMP200 with a SSVC4 Speaker Selector with Internal Impedance matching Volume Controls or DSM4 a passive unit w/o Volume Controls and four individual OVC300 Volume Controls. TL-2135
Customer Service - Q&A
on August 23, 2013

from Orlando Florida asked:
March 8, 2013
Can these speakers be hooked up to a T.V. that uses digital audio coxial cable?
1 Answer
Hi Randy, Most TVs have pre-amplified speaker outputs that are either variable (controlled by TV's remote) or fixed (controlled by whatever amplifier or receiver it is connected to before connecting the speakers). The RX640 rock speakers are passive and need an amplifier or receiver to power them. A digital coax connection would be for connecting to an audio/video receiver that features a digital input. There are Sound Bars that feature a digital input for direct connection to the TV. TL/MA #1687
Customer Service - Q&A
on March 10, 2013

from Kitchener, Ontario, Canada asked:
October 7, 2012
Already own some of your other products and have no complaints. Are these speakers able to be directly rained on? They will be outside during the summer months at the cottage, and we will not always be able to bring them in if it rains.
1 Answer
Hi James, Our speakers are designed specifically for the outdoors and can withstand rain. Any extra protection you can give them in extreme weather is always recommended. We suggest covering them or brining them inside during heavy storms. The extra protection will only add to the longevity of your investment. CL/MA 1321
Customer Service - Q&A
on October 8, 2012

from Orange COunty, CA asked:
June 25, 2012
can these speakers be input directly into an iPod or other Mp3 device or do they have to go thru an amp?
1 Answer
Hi Jackson, You need to connect to an amplifier first before connecting to the RX640 speakers. Our AMP120 allows you to connect two sources and automatically switch between them. Input number one takes priority while it is active. When you turn source one off, the second source starts to play after a brief pause. We have all the cables you need to connect to the amplifier from your iPod and the speaker wire you need to run to your rock speakers. TL/MA
Customer Service - Q&A
on June 26, 2012

from Chicago asked:
November 9, 2011
Can these speakers endure the hot Arizona heat?
1 Answer
Yes, there is a reason why we are the number one internet site for outdoor speakers. We have been building and designing all types of outdoor speakers including Rocks, Patio and Garden speakers since 2003. We are based in Orange County California and Arizona is one of our biggest markets. Extreme heat no problem. TL
Customer Service - Q&A
on November 10, 2011

from Fair Oaks, CA asked:
November 6, 2011
Hi, My husband have been talking about getting speakers that look like rocks... Mrs. Claus wants to buy them for him. Are they hard to install and do you have a ton of wire outside from your source. Any assistance would be appreciated. I am technology challenged. Thanks, Mrs.Claus
1 Answer
You’ve chosen a great gift for your husband, Mrs Claus! Most of our customers install their rocks themselves so it’s not particularly difficult. The challenge is connecting the speakers to the source. The speakers you are looking at come in stereo pairs and both need to be wired back to the source. Since your husband has expressed interest in rock speakers, he probably already understands what’s involved. We offer the special CL3 speaker cables you will need to run outside (direct burial cables). OSD has the largest selection of outdoor rock speakers available in multiple colors and sizes (6.5" & 8" speaker). We do have a couple wireless options as well. Here’s a great article on choosing the right speaker. MA/TL
Customer Service - Q&A
on November 7, 2011

Product Reviews

58 Reviews
81% (47)
19% (11)
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90% Recommend this product (52 of 58 responses)
By Kiwi
Sacramento, CA
March 22, 2013
Perfect for outdoor music
I purchased these to add to my existing house sound system. They sound great with adequate bass. I have them approximately 20ft apart in my spa/pool area. I painted them to roughly match the surrounding natural rocks and they fit in with the landscape nicely. Purchased the OSD outdoor volume control to go with the rock speakers and the set up works great.
ProsOutdoor sound with plenty of bass. Easily painted to match landscape. Solid construction and weatherproofing.
ConsSuggestion: Package with silicone filled waterproof wire connectors.
Best UsesQuality outdoor sound/music.
By Jim
May 23, 2018
Very surprised great sound and bass for the money. Can't go wrong.
By Karen Bell
April 13, 2018
Great for the money!
We have 2 excellent wired speaks in our backyard and 2 of these to fill in the sound, excellent for that purpose, great price plus we received them the day after ordering, fantastic customer service.
By Bill Heink
November 24, 2016
Excellent Product
Not my first purchase from Outfoor Speaker Depot, but very satisfied. The 6.5 inch speakers have far better audio quality than the 5 inchers.. In our hrsh Florida climate, these speakers work very well. A strong recommendation.
January 6, 2014
Bought 6, then came back for 4 more
These are great speakers around our pool and patio. We are very pleased with the sound, the size and the style that fits well in our desert/rock landscape. We hooked the first speakers up to our receiver and movie projector. They worked so well, that we decided to extend to other areas of the yard for when we have parties.
ProsWeather proof, easy installation
Best UsesSurround sound for pool, patio and yard areas.
By James
January 5, 2014
Excellent speakers and delivery was very timely.
Speakers are great and delivery was very timely. Thanks.
By Fernando
Phoenix, AZ
November 17, 2013
Great rock speakers
They sound great! They were shipped on time and received in great working order. Overall my experience was great!!
By JusmyO
Tampa, FL
September 16, 2013
Look good
After owning the round green outdoor speakers for 11 years, the waterproof calking covering the wire going into the unit broke down and after an extremly heavy rain, resulting in the speaker housing being 12 submergged until the ground could soak it up, the speaker short circited. So I decided to try the RX 640. Sound is not as good as the old ones, no where near as much Bass, but for pool outdoor speakers they are fine. They are sealed with the same silicone type calking, so I hope to get another 11 years out of these. I purchased directly from OSD and the speakers were shipped as promised without damage.
ProsAppear well made good sound good looking
Best UsesOutdoor setting Directional
By Keenan
Yorktown, VA
September 5, 2013
Osd Rx 640
Great speakers!
By Kevin
Greenville, South Carolina
August 24, 2013
Awesome look and sound
These are speakers, so installation could not be simpler. It was nice to have a long wire attached as part of the overall construction. These guys sound great and look great in the landscape around our pool. Very satisfied with the quality and volume we are able to get these to.
ProsDurable Natural color
Best UsesBlending into the scenery.
By Shannon
August 21, 2013
Rock speakers
So glad I got these. Easy to install and they sound awesome. Exactly what I was looking for.
By Patrick
Chicago area
July 25, 2013
Very Happy
Nice speakers, sound quality was good, but they are going to cost me some money. My old receiver isn't powerful enough for them so that will have to be replaced. They came with everything needed to get them up and running.
By Tim
Fairport, NY
July 8, 2013
Fills in the yard with nice sound
Great sound fills in the whole yard nicely - if you have long runs it will have some losses... I had 100 feet from receiver to each speaker and the sounds is great. I would and have referred friends ....
By Karen
New york
July 8, 2013
Rock speakers
We love our speakers. Great sound !!! Blend right in our landscape around pool ..
ProsGreat sound
Best UsesOutdoor entertaining
By Stephani
Council Bluffs, IA
July 3, 2013
It was a gift...
... for my father for Father's Day. I gave 4 stars because I have not personally heard the sound that they produce yet. My dad was completely shocked and very excited for them and him and my step mom say they sound great. I'm sure they are 5 star worthy but I cannot give a perfect score to something that I'm not sure of, is perfect :) I was very happy with the price, the no tax, the free shipping, and the packaging. They were not dented or anything, I appreciate the quality that I feel that I got from this product and this company. It will definitely make me a return customer and I have told others about this site as well.
By Jon
July 2, 2013
Outdoor rock speakers
A very nice pair of speakers. Company is very void to deal with.
By Jason
Tempe, Arizona
June 20, 2013
These speakers 'rock'!
Build and look were better than I've see elsewhere, but the sound is the key. These speakers sound amazing outdoors. Can't say enough good things!
By Charlie
Long Island NY
June 17, 2013
Great Speakers
Easy to install and sound is great for the price .
ProsGood sound and easy installation
Best UsesAround my pool
Philadelphia, PA
June 7, 2013
Great speakers for the price!
Great value for the price. Perfect size, love the grey color and sound output is great on our patio.
By Dominic
Hollister, CA
June 6, 2013
Nice outdoor speakers
These are a nice looking and sounding pair of outdoor speakers. We have them in the ground next to the pool. Look great!
By Mike
Branchburg, NJ
May 20, 2013
Great deck speakers.
Had my first set of rock spekers for years.
By Gary
Virginia Beach, Va
May 15, 2013
Great set of speakers!
I bought the first pair 4 years ago for around the pool, still pumping. I wanted another set for the other side of the backyard.
ProsI leave them outside year around, heat or cold does not effect them.
By Mario
Staten Island NY
May 4, 2013
Great speakers
Bought these for my yard by my pool sound is very good and clear. Would recommend
ProsLook great and sound great
Best UsesIn back yard
By Don
Walnut Creek, CA
April 29, 2013
Excellent product
Arrived before I was ready - wonderful service. Easy to hook up and very acceptable sound quality. I would recommend to anyone who has need for an outdoor garden speaker set
By Mac
lake havasu city,AZ
April 20, 2013
had smaller 4 in. rock speakers,they were ok,but burnt up after 8yrs.(outdoors in AZ,not bad) I found the RX360's online,when I received them I noticed how much bigger they were than my old ones. 4 in. versus 6 in. for the new ones. these are excellent outdoor speakers,especially at this price. good sound,and they look good. highly recommended
Proslook and sound good