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Home / Product Category / SPEAKERS / Outdoor Speakers / Decorative Landscape Speakers / PS520 Planter 5.25" Omni 2-Way Speakers Pair / 25W Outdoor Marine Amp/Receiver OSD-MA2

25W Outdoor Marine Amp/Receiver OSD-MA2

Product code: OSD-MA2

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Features & Specifications

The OSD MA2 outdoor/marine amplifier is a great solution for customers who want to a simple outdoor speaker system such as a pair of smaller speakers in the patio or by the pool. Rated at 25W per channel, this all-weather amp uses an impact resistant, all weather ABS enclosure so it can take the rigors of the outdoor climate. Other features include a built-in AM/FM tuner and a convenient iPod jack and included mini cable so you're up and running in a matter of minutes. The MA2 works with any indoor/outdoor power outlet and is perfect for listening to outdoor speakers without interfering with interior speaker set-ups.


Other Product Info

Outdoor weatherproof amplifier with a built-in AM/FM tuner, total 30W digital output power, ipod jack included. Works with any indoor/outdoor power outlet. Perfect for listening to outdoor speakers without interfering with interior speaker set-ups.



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30 Questions & 30 Answers
from long island, new york asked:
June 4, 2012
I'm looking to basically set up a sound system on my deck. i want to mount the speakers to the house. i want high quality sound like a bose or something. would that sound good with this receiver? i also like my music loud and heavy. thanks
1 Answer
Hi Pat, The MA2 is an application piece for outdoor use and is not considered a workhorse. Therefore, it would have trouble with BOSE 4-ohm speakers. Sound quality would not be considered a strong suite, nor is high output and heavy bass a part of the MA2 vocabulary. When it comes to power amplifiers/receivers, you get what you pay for in power and functionality. Check out our AMP200. This is true Audiophile Sound Quality High Current Amplifier. Then we can talk about designing a system. TL/MA
Submitted by: Customer Service - Q&A on June 4, 2012

Paul Rassel
from PA asked:
May 18, 2012
What ohm speakers should be used with this system. Can I use it on a golf cart . Can I hook it up directly to 12 Volt battery?
1 Answer
The MA2 should be used with 8 ohm speakers and you have a choice of powering the unit with a 12 volt Cigarette lighter adapter plug. Hopefully you have a cigarette or 12 volt outlet on your golf cart. Our outdoor patio speakers might work the best for you application. CL
Submitted by: Customer Service - Q&A on May 18, 2012

from Tennessee asked:
July 29, 2017
Can I hook my Verizon Moto phone to it and run it thru the speakers?
1 Answer
Hi Birddog I believe you can connect your Moto Phone as long as it has a headphone jack. Just connect the Mot phone with an aux cab;e (3.5mm to 3.5mm stereo - 2 stripes on the pin). Then connect the other end to the Ipod input of the MA2. TL/4493
Submitted by: Customer Service - Q&A on July 29, 2017

from PA asked:
July 15, 2017
I want to use this amplifier to drive 2 Yamaha outdoor speakers - 6 ohm impedance (120 watts max). Will this amplifier work with these speakers?
1 Answer
Hi Dave: Not sure if this is enough power and it is a chip amp that does not make your speakers sound better. Better choice would be the XMP100 a true digital Amplifier. that is 93% more efficient. The MA2 is a class AB am=p meaning it is only 50% efficient. Good luck TL/4469
Submitted by: Customer Service - Q&A on July 21, 2017

from Phila asked:
June 16, 2017
is this 4 or 8 ohm system?
1 Answer
Hi Davis: This is a 8 ohm system only will run a single pair of 8 ohm speakers left and Right stereo. It does have a signal low level pre amp output as well. TL/4428
Submitted by: Customer Service - Q&A on June 19, 2017

Scotty D
from Pittsburgh, PA asked:
March 10, 2017
Can this unit effectively power two Bose Free Space 51 Outdoor Speakers? My Concern is that it's not going to have enough power or send out a rich enough well rounded signal and the speakers will have no low end from the receiver.
1 Answer
Hi Scott D: In audio there is a Theory of Relativity applied to matching of the components of your system. Your cost for amplification and source should be close to equal what you paid for your speakers. BOSE products are excellent but you are paying a premium. So you should be budgeting around 60% of what you spent for the Speakers. Your best buy for this would be our OSD AMP200 and add a $20.00 Bluetooth Dongle as one of your sources so you can stream your source from your Bluetooth enabled device (Smartphone , tablet or laptop). The AMP200 features automatic source switching between two sources, one could be your Bluetooth Receiver(checkout Bluetooth Receivers at AMAZON) and the other could be a hardwired option like CD/DVD Player or even your laptop that has your digital library. Checkout the Price of the AMP200, unlike the BOSE the AMP200 is way undervalued, a great Performance/Value quotient. No problem getting all the Bass and clarity you want. This is a High Current true Audiophile Amplifier. You will even be able to add a second pair Free Space 51 down the road adding the pair to Speaker B. TL/4245
Submitted by: Customer Service - Q&A on March 10, 2017

Rob Zimmer
from Columbus, Ohio asked:
November 27, 2015
I have two 8-ohm un-powered speakers one would traditionally get with a desktop computer. Would this amplifier/receiver work ok with those speakers in a largish bathroom (high humidity/heat)? Thanks, -Rob
1 Answer
Hi Rob, This is a marine rated receiver so it can be in a high-humidity area. As for the speakers, it depends on how much watts they can handle and if it's a wired speaker or not. Most computer speakers work off USB or RCA connections and aren't the type that run to an amplifier.
Submitted by: Customer Service - Q&A on December 14, 2015

from Texas asked:
May 16, 2015
Are the speaker connections considered RCA jack?
1 Answer
Hi Mike, They are speaker wire adapters that look very similar to RCA, but are not RCA. It's similar to a banana plug.
Submitted by: Customer Service - Q&A on May 28, 2015

from Edgefield, SC asked:
March 6, 2015
Will the MA 2 power a pair of OS790 8" Omni Speakers with a run of less than 30 feet? Hoping this would be an answer to my outdoor kitchen/patio audio issue
1 Answer
Hi David, The MA2 can power them but it only puts out 25 watts per channel, an 8" speaker like the OS790 isn't going to reach its full potential with only 25 watts.
Submitted by: Customer Service - Q&A on March 9, 2015

from Kansas City asked:
September 9, 2014
Is this the only amp/tuner available for outdoor use?
1 Answer
Hi Don, Yes - this is the only outdoor, marine-rated amp/receiver that we sell.
Submitted by: Customer Service - Q&A on September 15, 2014

from Ohio asked:
July 12, 2014
I have had this radio for a couple of years and all at once the power brick died. Is there a replacement brick you can buy? Thank you.
1 Answer
Hello Brian, You can order it once it's back in-stock within the next few weeks at the link below: If you are in a rush, give us a call and we'll find a solution. Thank you.
Submitted by: Customer Service - Q&A on July 14, 2014

from Grand Junction, CO asked:
June 26, 2013
It appears you cannot hook up bare wire speakers to this unit. What's with that?
1 Answer
Hello, The MA2 outdoor receiver is unique in that way. It includes adapters that plug into the amp and bare wire to the speaker. CL/MA 2024
Submitted by: Customer Service - Q&A on July 2, 2013

Walt Mannherz
from Mineral VA asked:
May 25, 2013
Looking for an outdoor receiver that is blue tooth enabled so that I can control vol and play music such as pandora from my phone on the dock, and has enough power to crank sound through at least four speakers.
1 Answer
Hi Walt, The MA2 is our only receiver rated for outdoor use but it will not have the power for your requirements. You might have some trouble finding an outdoor receiver that will drive four speakers. Most times customers build an enclosure or run the wires from indoors. I would recommend our AMP200 for an application like that where you can protect it. You can use our bluetooth source kit the RS-BSK1. CL/MA 1931
Submitted by: Customer Service - Q&A on May 31, 2013

from Folsom, CA asked:
May 5, 2013
Looking to purchase this for a small/medium sized backyard and pool area (50' x 30'). Not looking for a lot of sound or high end bass, just something to add music to the pool area. Would this be a good choice to pair with a couple of AP490 speakers? Also if I'm only hooking this up to 2 speakers can I bridge the 4-channel output to double the power to each speaker? Finally is this unit mountable, say in a vertical position?
1 Answer
Hi Matt, The MA-2 outdoor receiver/amplifier is 25W per channel and designed for background music. It is not bridgeable and will slightly under power the AP490s. You can mount it in any position with no trouble. CL/MA 1867
Submitted by: Customer Service - Q&A on May 10, 2013

Roscoe Egry
from Northern Virginia asked:
April 18, 2013
I have 6 outdoor rock (wired) speakers that i want to set up to run off an MP3 or other device that I can manage from outdoors without having to go indoors for volume adjustments etc. Can you recommend a set up for me. I have planned for two zones (amp stations) for each 3 speakers. So i guess I have one Input device and two amp stations and 6 speakers. I would go wireless but I already have the speakers. Thanks Roscoe
1 Answer
Hi Roscoe, Our MA2 outdoor amplifier is 25 Watts per channel, so be sure that it is compatible with your current speakers. The alternative is to use an amp indoors like our AMP200 with a volume control in each of your 3 zones, like our OVC300. With an outdoor volume control in each zone, you can control the volume independently for each pair without having to go back into the house. The advantage of an indoor amp is more power for your outdoor speakers, rather than settling for a smaller amp that may under power your setup. CL/MA1809
Submitted by: Customer Service - Q&A on April 19, 2013

from MN asked:
April 6, 2013
Will this MA2 amp drive a pair TIC GS5 50W 8 Ohm exterior speakers? I want to use this setup with with one speaker 50 ft from receiver and the other 150 ft from reciever. I plan to install this in the middle of my vineyard with speakers 6 feet high above the ground to keep raccoons and other grape eating critters away by hearing talk radio all day & night. Plan to use 14 Ga wire for 150 ft speaker. Will this work?
1 Answer
Hello, The MA2 amplifier will technically drive the speakers for your unique application. The speakers may be slightly under powered (less volume capability), especially with a long cable run of 150 ft. You might consider using a more powerful indoor amp such as our AMP and placing it in a shed if possible. Using 14ga wire should be fine. Good luck with the critters! CL/MA 1775
Submitted by: Customer Service - Q&A on April 9, 2013

from Lexington,ky asked:
November 25, 2012
I have a old pair of klh rlh 450. From reading seems like it will run fine with this amp. Wanted to make sure before I purchased?
1 Answer
Hi Casey: I would not go with less than our AMP120 to drive your 8" KLH rock speakers. Timing is good checkout the Cyber Monday special on the AMP120. TL 1414
Submitted by: Customer Service - Q&A on November 25, 2012

from nashville tennessee asked:
August 2, 2012
Does this work with satelite radio?
1 Answer
Hi Rick, You can connect anything that accepts an RCA cable or a 3.5mm (like a headphone) to the MA2. CL/MA 1196
Submitted by: Customer Service - Q&A on August 3, 2012

from Chicago asked:
July 27, 2012
With this outdoor amp, which outdoor speakers do you recommend? I know it is 8 ohm. I am looking to put it on a pool deck with a couple of speakers and use an mp3 player. And are there any additional accessories that work well with this setup. Thanks, Jerry
1 Answer
Hi Jerry, The MA2 puts out 25 watt per channel so our smallest patio speaker would be the way to go. Take a look at our AP425 CL
Submitted by: Customer Service - Q&A on July 27, 2012

from Los Angeles asked:
June 30, 2012
Does this come with outdoor speaker wires? If not, what kind would be suggested?
1 Answer
Hi Ed, This unit comes with four speaker wires, which measure about four feet long. They are terminated with RCA connectors on one end (that plugs directly into the MA2 back panel). The other end of the cable is 2-conductor: red for positive and black for negative. These are not terminated but rather bare wires. You can extend the cables (if they are not long enough) by splicing them with something like our CL3- rated 16-gauge, 2-conductor cable which is ideal for in-wall, outdoor and direct burial applications. If you need to extend the cables, I would recommend splicing into the cable as near to the input connector as possible (within a foot of the connector). I hope that answers your question. TL/MA
Submitted by: Customer Service - Q&A on July 2, 2012

from Texas asked:
June 28, 2012
Will this have enough power for a pair of Insignia Rock Outdoor Speakers Model # NS-R2111?
1 Answer
Hi Slash, This outdoor receiver is typically used with 4" speakers or smaller so you might find you'll need more power. We recommend using the AMP120 indoors and then running speaker cable outside to the speakers. This will give you more ideal power and maximize sound quality. CL/MA
Submitted by: Customer Service - Q&A on June 28, 2012

Michael Stemmons
from Hebron, Indiana asked:
June 19, 2012
Im looking for an outdoor receiver that I can play my IPOD through. i dont see how this connects and does it matter which version of IPOD it is?
1 Answer
Michael, The MA2 comes with the mini cable that would connect directly into your headphone jack of any ipod, iphone, or mp3 player. CL
Submitted by: Customer Service - Q&A on June 20, 2012

from Ohio asked:
June 12, 2012
Would this work with a Yamaha NS-AW150W 2-Way Outdoor Speakers
1 Answer
It will play music, but it might not be enough power to really drive the speakers to their full potential. The Yamaha speakers are 6 ohm, not 8 ohm (which is critical for the MA2) and the sensitivity is 85 dB which means they take more power to drive. Something like our AMP120 or higher would be a much better match. TL/MA
Submitted by: Customer Service - Q&A on June 14, 2012

from New York asked:
June 9, 2012
How do you boost the fm reception on this unit
1 Answer
Hi Steve, There is an antenna in the box just for FM (about three feet of 20 gauge wire with a simple loop at the end). If this is not sufficient, you can try to create your own antenna by making a longer wire with a loop at the end. Then try moving it around to different positions without you holding it (you become part of the antenna while still in your hand). There are some commercial FM antennas available as well but then you're spending more for the product. TL/MA
Submitted by: Customer Service - Q&A on June 14, 2012

from Jacksonville, FL asked:
May 24, 2012
I have a pair of Bose 151® SE environmental speakers and I would like to run them to this and connect the TV/ Cable box to this as well. Is this possible? If not do you have another outdoor receiver amp you recommend?
1 Answer
Jim, Those are 4ohm speakers- so this would not work with the MA2- If you are running a single pair you should hook up our AMP120 or AMP150. Although this would not work for your outdoor application because they are both indoors. You would have to build them into something totally protected from the elements. CL
Submitted by: Customer Service - Q&A on May 24, 2012

from Folly Beach, SC asked:
May 17, 2012
Can you used wireless speakers with this system
1 Answer
Christy, You can use this with a wireless system yes. Check out the popular WR800's - Their great! CL
Submitted by: Customer Service - Q&A on May 17, 2012

from Fort Lauderdale Florida asked:
May 8, 2012
How do I purchase another power transformer?
1 Answer
Gary, Yes we do, the power supply is 29.99. Your reference number is 211679 CL
Submitted by: Customer Service - Q&A on May 8, 2012

from Minneapolis minnesota asked:
April 1, 2012
Will you be getting any more of these in stock
1 Answer
Hi Marlin: The MA2 have been shipped from our Factory, they are literally on the water. We expect them to arrive the first week of May. TL
Submitted by: Customer Service - Q&A on April 2, 2012

from san antonio asked:
February 17, 2012
can you use this to hook a tv to speakers
1 Answer
Mike. This comes with the rca cables that would go directly into the tv. CL PS: Just make sure your TV has pre amp output for the audio first before making your purchase. It has to be an analog (right and left RCA) output so you can connect to the input of the MA2.
Submitted by: Customer Service - Q&A on February 17, 2012

from Gold Coast, Australia asked:
November 5, 2011
Will this power outdoor speakers? I have two sets of outdoor speakers but they have the type of input that requires raw speaker wire to be connected to it for audio output and power. Would this be something that I could use to connect it to this? Thanks, Daniel
1 Answer
The MA2 comes with four speaker cables featuring an RCA jack (two black and two red) at one end and two bare wires (positive and negative) at the other end. Although the unit was designed for two pairs of speakers, we typically do not recommend more than a single pair. Connecting two pairs causes an unfavorable load (four ohms or lower depending on the actual impedance of the speakers) for the internal amplifier and eventually causes it to shut down. One thing to consider would be to use the MA-2 to drive a single pair of speakers and then adding our OSD AMP60 to drive the second pair of speakers. There is a cable included to connect the two. The AMP60 also features four speaker outputs but the same rule applies as the MA-2 (recommending one pair of speakers only). In this setup, you will have no problem connecting or driving your current two pairs of outdoor speakers
Submitted by: Customer Service - Q&A on November 7, 2011

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