Mobile Navigation
My Account


Call for Help
Home / Product Category / AMP / Stereo Amplifiers / AMP300 High Current Class A/B 2 Channel Amplifier 350-Watt (2 Ohm stable) Bridged Mono 470-Watt

AMP300 High Current Class A/B 2 Channel Amplifier 350-Watt (2 Ohm stable) Bridged Mono 470-Watt

Product code: OSD-AMP300

In Stock
Free Shipping
OSD Price: $349.95
Compare at: $749.95 You Save: $400.00 (53%)
Sold in single 1 = 1 pc
30-Day Money Back Guarantee

Features & Specifications

With the AMP-300 from Outdoor Speaker Depot, you can have exceptional sound quality and plenty of power for a whole house audio system. This audio amp has technologically advanced features that are typically reserved for amplifiers costing much more. There are 2 sets of speaker outputs with front panel controls, auto-on signal sensing or 12-volt trigger, high-current capability for increased power, real panel master level controls and dual line-level inputs with priority override switching. This OSD amplifier has a dual voltage of 110V/220V and auto signal sensing. The AMP-300 OSD amp comes with a 2-year warranty. See what people are saying about the OSD AMP-300 in our stereo amp reviews.

We carry a wide range of high performance audio equipment for whole house entertainment systems. On this site, you'll find single-zone and multi-zone receivers, speakers, volume controls, wall plates, cables and connectors. You'll also find amplifier, speaker and whole house audio reviews from satisfied customers.


Other Product Info

The AMP300 (MI6) is an excellent power amplifier for pro-installation applications. It is a high current (2 Ohm Stable) two channel power amplifier, which is overload stable. It is ideal for use as a remote amplifier, or as a single or dual zone amplifier. It's the perfect heavy duty, high fidelity amp for powering your whole house audio system! With a stylish, built-in voltage meter, it can can produce some serious power to drive your whole house audio speakers! Weight is 40lbs. Feature



  View Owner's Manual            Product Information


By jim W from Rockleigh NJ on March 5, 2012
i already have a Intergrated Amp I need a another Amp to help Power (8) 8 ohm speakers will this unit work for me. was looking to power 4 of the 8 speakers with it.
By Customer Service - Q&A on March 6, 2012

Our Amp300 will handle this application, no problem.

By Kory from Omaha, NE on September 12, 2012
I am finishing my basement, and trying to figure out best set-up for speakers, equip, etc. I plan to have roughly 6 different zones (living room, bar area, 3 bedrooms, and outdoor). After running my speaker wires, how do I set-up from there? Do I need a receiver and an amp? I assume I hook up all speakers into amp, and then that hooks up to receiver? Also, where does my speaker selector fit in....where is that wired? Do I need a certain type of receiver to handle this many speakers and zones? HELP.....I'm obviously a novice!
By Customer Service - Q&A on September 14, 2012

Hi Kory,
The speaker selector goes with the amp and receiver. Take a look at our 6-zone kit in 'whole house audio, then 'multi-room audio.' Basically, you run the speaker cable from the speaker to the volume control for each zone. Everything is then connected to the speaker selector which is connected to the amp, and the receiver is the audio source—all in one general location. Call or email us for more advice or if you have more questions. - 1.888.779.4968
CL/MA 1288

By Ken from Alameda, California on September 13, 2012
I am looking at setting up indoor and outdoor speakers at a golf course. I am looking at 4 ceiling Ice 650 speakers inside the golf shop and 4 AP 650 speakers outside on patio by putting green. I want an amp that has ability to power good volume (not just background level) for special events outside and also be able to have three volume zones to control sound levels. Would the AMP 300 be best option or something else? Also what other accessories will I need?
By Customer Service - Q&A on September 14, 2012

For up to 8 speakers total, you can use the AMP200 with the DSM4 and 4 volume controls (inside svc300 and outside ovc300). This would give you all the volume you are looking for. Each volume control is a 12-step knob style.
CL/MA 1290

By Mike Ruiz from El Paso Texas on September 15, 2012
Great amp the only issue is the lights on the LED meters stay on even when amp is off line. Any way for these lights to turn off as well?
By Customer Service - Q&A on September 19, 2012

Hi Mike,
Glad you like the amp. The status bar stays on during normal operation, even if no source is playing. The only way to turn it off is to turn off the amp. If the light bothers you while watching a movie, you can always cover it but there is no switch to disengage it.

CL/MA 1291

By Michael Woods from Muskoka, Ontario, Canada on March 11, 2012
I have bought a small resort. We want to run one sound source in the restaurant and one sound source in the bar and patio; all controls to be set up and contolled from behind the bar. I have purchased a 2 channel 5 zone speaker controller. We will want to run either satelite or internet sources plus an ipad dock. Total sets of speakers on each channel will be 8. Will two of these amps be enough power for each channel? Thanks for your help.

M. Woods
By Customer Service - Q&A on March 11, 2012

Hi Michael:

Based upon your application I would recommend an AMP300 per each location. One for the Resurant and one for the Patio/Bar. I am a little confused on application for the single 2 channel 5 zone speaker controller. I would have recommended going with our SSVC4 Speaker selector per amplifier. That way you can connect four pairs of speakers for both the Resturant and the Bar/Patio locations. The SSVC4 features Internal Volume Controls for each pair of speakers while controlling the impedance back to the amplifier. This would give you additonal control from the central location. You could then have a dedicated source connection to a computer (for Itunes or streaming media) using a Y adaptor to split between the input 2 of each amplifier. You could then have the option of plugging the iPad into either amplifier Input #1 and when you play it would take priority over the other source. These Amplifiers are very flexible and appear to be a great fit. We can also help you out with any of your Speakers and CL3 rated speaker wire needs as well. Thank you for considering OSD Audio.


By Joe from Sydney, Australia on June 30, 2012
Would someone let me know if this Amp (AMP300 M16) comes with a remote control please.
Thanks. Joe
By Customer Service - Q&A on July 2, 2012

Hi Joe,

There is no remote control that directly controls the AMP300 because in most applications, it connects to an Audio Video receiver to power second zone outputs. In these cases, you would depend on the receiver’s remote to control source selection and basic functions. When connecting directly to an iPod or iPhone, some customers utilize a docking station that features a remote that controls basic functions as well. The amp does feature a 12-volt trigger so it can be connected to a receiver that can turn the amplifier on/off . The amplifier also features an auto-sensing option so it will turn on and off automatically when music is present.

So, no TL

By joe from rehoboth ma on September 29, 2012
I have the AMP 300 300W hooked up to my Yamaha RXA2000 and use it to power my home surround system (10 speakers) via Yamaha multi zone function (Zone 2). Both are located in my basement and not easily accessible. Unfortunately, when I remotely shut down the Yamaha receiver, the AMP 300 stays on. Is there any way to turn the AMP 300 off w/o having to manually go to my basement and shut it off? If not, if I leave the AMP 300 on all the time will it damage the AMP or my Receiver? Also, does the AMP use a lot of electricity if its left on 24/7/365.
By Customer Service - Q&A on October 1, 2012

Hi Joe,
Your best option is to take advantage of the "auto-on" feature. This will allow the amp to go into sleep mode when not in use but be ready when you want to use your system without having to physically turn it on each time. The switch is on the back and you select "auto-on" vs. "normal" mode. Keep in mind, however, that the lights will stay on even though the amp is "sleeping" in standby mode. Standby mode uses very little power so that should not be an issue.
CL/MA 1311

By Tim from Atlanta on January 21, 2013
I just purchased a home that is wired for 18 pairs of speakers in 15 different zones . The previous owner removed everything, and I mean everything. I have 8" round cutouts in 13 zones (all ceiling), 6"x10" cutouts (2 pairs) in one zone, and I'm wide open for 2 outdoor pairs for a very large deck/pool area. Each area appeared to have it's own volume control and wires are still present. I have a Yamaha HTR 5440 receiver I would like to connect to an Apple TV for streaming Itunes through my WiFi, but the receiver has no Optical Out to feed an amp(s). I only need background music for all of the zones except for the 2 outdoor pairs. Any suggestions?? On a tight budget!
By Customer Service - Q&A on January 28, 2013

Hi Tim,

Based upon you cutouts, you will need 6.5" in-ceiling and 6.5" in-wall. We recommend our Pro series as your best performance for the money (ICE640 In-Ceiling and IW680 for the In-Wall). Are there volume controls in each room or are the wires run directly to the speaker location from a central location? They may have taken the volume controls as well. It is important to know if the system had volume controls to determine the best speaker selector for your application. If you did not have volume controls, we recommend two TSM8 speaker selectors and two of the OSD AMP200 to power each speaker selector. Connect the two outdoor speakers directly to the B output of one of the amps with the speaker selector connected to the Speaker A output. The amp would get an analog feed from the APPLE TV which has the internal DAC converting the digital to analog signal.

TL/MA - 1571

By Jeff from Atlanta, GA on May 7, 2012
We just bought a new house with speakers (and volume control switches) in 8 areas. Ideally we could select from a few different sources (computer, TV, iPad) and limit what areas got what (one area with TV while another listens to music).
Will this amp work?
What speaker selector would you pair with it?
Any chance I can replace an volume control with a pad that can control the music (I am reaching here...)?
By Customer Service - Q&A on May 8, 2012

We sell the AMP300 in both our 6 and 8 zone kits- In the 8 zone we group it with the ISS8- This would allow you to have two sources plugged in at once and listen to one or the other.
Take a look at our MX1260- it is a step above the amp and speaker selector system, allowing you to connect 4 sources and listen to them simultaneously. Although it is only for size zones it might work out better for you finding a different way to power that 8th zone.
Also if you have the option of running cat5 - the digital keypads on the Breath Audio and Channel Plus systems we sell in our whole house audio section are superior. So if you have some time give us a call @ 1.888.779.4968 if you have further questions
By Customer Service - Q&A on May 8, 2012

Hi Jeff:

Before you get started you need to examine one of the Volume Controls that are in the wall. Remove the knob and face plate pull it out of the j-box and see if there is a impedance matching setting. Best if you can actually take a couple of digital pictures of the Volume Control. This will tell us how the current system was configured and what we need to do going forward. It would help if you describe the speaker configuration and take a picture where the system will be setup and how the wires are home run back to the central location.


By John from Boston, MA on March 17, 2012
I have in-ceiling and in-wall speakers connected in 6 zones / areas of the house. I would like to play music throughout the house from one source (connected via iPad or iPod). What set-up do I need? I do have Martin Logan speakers
By Customer Service - Q&A on March 17, 2012

Hi John:

Can you let us know how your current system is configured? Regarding your in-ceiling and in-wall speakers are they connected with a dedicated control system like a NUVO or Russound whole house audio system. Or is it connected using a speaker selector with volume controls in each room to control the impedance matching. You mentioned Martin Logans, is that your main speaker for listening and do you have additional speakers throughout for background music? The OSD AMP 300 is a High Current Amplifier that provides maximum flexibility for intregrating into a system while providing true audiophile sound quality. But please tell us more, I am intrigued by your teaser.


Product Reviews

AMP300 High Current Class A/B 2 Channel Amplifier 350-Watt (2 Ohm stable) Bridged Mono 470-Watt
4.5 Stars based on 14 Review(s)
Bill Hughes
Central Florida
4 Stars
I would recommend this item to a friend.

Plenty of Power
March 6, 2016
Nice, clean amp to use and plenty of power. I only wish the small gain knobs on the back were preset to at least the middle volume. It took me awhile to realize I wasn't getting sound because they were turned all the way down.
Best Uses:
Distributed audio of 4 or more speakers

5 Stars
I would recommend this item to a friend.

Awesome Amp
March 1, 2017
I bought this amp and another OM Sub-200 and another set of OS525. To add to the set I bought last year. The amp rocked the back yard. I have it about 60% on the main level and around 25% on the main volume. It sounds amazing. I now have a full surround sound in the backyard around the pool. It was really easy to hook up. I would recommend this amp to everyone.

San Diego
4 Stars
I would recommend this item to a friend.

Good product for my application
February 24, 2016
The Amp 300 was shipped quickly in good condition. It was easy to hook-up but I had an output problem. There was no sound coming out of the Amp300 to the speakers using the RCA wire connection. I tried it with the speaker wire connection, which I was certain sent sound from my receiver. I called customer service and the technician said to adjust the amp screws on the back. That solved the problem and it works fine in my application. I'm using it to drive 12 speakers connected to an ISS8 distribution box. It works great with more than enough power.
Good price for this much power
Slight set-up problem

5 Stars
I would recommend this item to a friend.

Pull the trigger.
November 15, 2014
I have two of these bridged mono in my home theater. I use a Harman Kardon 7550 HD as the pre-amp, the sound is crystal clear. I have tried several speakers, they all sound great, two sets got repaired under warrantee for pieces that really weren't the best from the factory, but they are all repaired now and the sound is great. These amps never run out of power, use discretion, and they also do not get hot at all.
Set them up and forget them, use them every day as hard or light as you please.
Best Uses:
Anything you need to amplify.

Toronto, ON
5 Stars
I would recommend this item to a friend.

Whole house audio workhorse
December 13, 2013
I've been using my Amp 300 to run my whole house audio system for over a year now and am very pleased. I run channel A into an SSVC4 speaker selector and channel B into a second SSVC4. The signal comes from a Yamaha RX-V671 Zone 2 output. I don't always have all 8 pairs of speakers on but when I do there's never a problem. Don't let 0.2 % THD discourage you. Human ears can't discern less than 2%. This is 1/10th of that! Great sound!
Price (value) Quality Looks
Rear mounted master volume (could be a blessing if you have toddlers!)
Best Uses:
Whole house audio

Randolph, nj
5 Stars
I would recommend this item to a friend.

Great power
August 16, 2013
Sound is great , super powerful. Love it.

mount pocono pa
5 Stars
I would recommend this item to a friend.

June 6, 2013
Great product easy to use. Does a great job and provides plenty of power for the 8 zone system I purchased.

just ma
katy tx
4 Stars
I would recommend this item to a friend.

puts the wow in wowzer .
March 22, 2013
if your looking for a clear sound and price to match this will truly put that smile on your face
clear sound from bass to tweets.. makes the music sound real
master volume inset on back
Best Uses:
any place you can kick back and enjoy your music

Stockbridge, GA
5 Stars
I would recommend this item to a friend.

An Amplifier for the ages
December 16, 2011
The delivery was on time and after setup, the sound was great. has become my first website of choice for my future purchases.
Good Power Output, Energy Efficient, Great Sound Quality, Easy To Set Up
Best Uses:
Larger Rooms

Robert Archer
5 Stars
I would recommend this item to a friend.

Jazzed Up About Affordable Amp
October 21, 2011
Click to see the reviewer of CEPro on AMP300
Easy To Setup, Good Power Output, Great Sound Quality, Energy Efficient
Best Uses:
Multiple Rooms / Whole House, Larger Rooms

Cincinnati Ohio
4 Stars
I would recommend this item to a friend.

Works as Promised
October 20, 2011
Read the manual to set it sound without the adjustments described in the manual
Good Power Output, Great Sound Quality, Accurate Controls
Need to read the manual
Best Uses:
Multiple Rooms / Whole House

5 Stars
I would recommend this item to a friend.

Quality Products [...]
May 17, 2011
I purchased the amplifier last august as part of my preparations for a home audio system during construction of our new house. The ceiling speakers were mounted then and i organised to purchase this amplifier at the same time.[...]I cannot recommend their pricing [...] highly enough. i've finally got the system set up and it sounds fantastic. The amp is driving 4 split sets of ceiling speakers in the house and managing this without any problem at all - in fact I've had to set the output way down! i've never been happier with a purchase than my recent experience with OSD
Easy To Setup, Good Power Output, Great Sound Quality
Best Uses:
Multiple Rooms / Whole House, Larger Rooms

5 Stars

I purchased this ...
February 13, 2011
I purchased this amplifier to run a pair of the A830 outdoor speakers. I was leery about purchasing this amplifier because I couldn't really find a good review of it and it also has a noise rating of "less than 0.2% THD N" when I ordinarily never purchase an amplifier with a rating of anything above 0.0x% (x being a value of 1-9). One thing I did find odd about the amp was that the "Master Level"? of both channels was turned all the way down to low, or off, thus making no sound come from the speakers when I started testing the amp. Once I noticed this setting I corrected it by turning both "Master Level"? channels up to the middle. This middle setting produced enough volume to make the A830 patio speaker loud enough that the neighbors were looking out of their windows. The A830 at this volume were clean, no distortion, and I couldnäó»t be more pleased with this amplifier.

5 Stars

Well, what can I say... I ...
June 11, 2008
Well, what can I say... I really enjoyed my experience with OSD. Not only did I place my order 4 days before Christmas, they actually emailed me, and spoke to me on the phone, over the holidays to ensure my product would be shipped in time. I purchased a sizeable amplifier, and two nice speakers for our back deck... And the quality is simply great. The amp, is built more solid than my 1500$ Harmon Kardon receiver, with a 4mm thick aluminum front panel, and good quality caps/EMI shielding on the inside. These guys were even a pleasure to deal with, as I live outside of the US, they called me (on their bill) to discuss ways to make the ~600$ shipping, MUCH cheaper. We ended up getting shipping down to 200$, for a 97lb order. I was very pleased... and would order from them again.