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    SKU: OSD-AMP300

    OSD AMP3002-Channel 350W Per Channel, High Current Class A/B Stereo Amplifier Toroidal Transformers

    Purchase 2-Channel 350W Per Channel, High Current Class A/B Stereo Amplifier Toroidal Transformers - AMP300
    • Outdoor Speaker Depot SKU: OSD-AMP300 stereo-amplifer
    • In Stock


      Compare at: $665.99
      You Save: $316

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    A heavy-duty 350-Watt A/B two-channel dual source amplifier for use as a remote or single amplifier.

    • Ideal for powering whole-house audio system or dedicated home theaters
    • Equipped with 350 Watts per channel peak power, 470 watts Bridged Mono into 8 ohms
    • Dual source capable for greater listening flexibility
    • Clean, brushed metal front panel with a volume control, power on/off button and balance control
    • Protection circuitry safeguards the amp from a short circuit
    • Can be configured as bridged or stereo amp
    A solid high-power amplifier does more than make the sound you love louder. A well-built power amp cleans up sound quality, improves bass response and delivers the right amount of power to efficiently drive multiple speakers in distributed audio system or home theater. Our AMP300 is a flagship amp that sells well for a reason. This 350-Watt A/B two-channel dual source amplifier is ideal for use as a remote amplifier to power your whole house audio system or as a single amp for a dedicated home theater or media room, and you won't find an amp with the same features that we pack in at such an affordable price. It is stable at 2 ohm load.

    Dual Source Switching
    The AMP300 also includes dual source switching to connect two audio sources and toggle between them for greater listening flexibility. Automatic source switching switches between connected sources with a priority signal-sensing feature, so if a DVD player is connected to input 2, then you decide to stream a movie through a game console, when the console is turned on, the AMP300 automatically switches to that source. The AMP300 also includes a variable delay control that lets you adjust the amount of time needed to "listen" for a signal from your main input, between 3 and 15 seconds. This prevents gaps between music tracks from accidentally switching your inputs. This high power amplifier includes two RCA signal level inputs so with the addition of an RCA-to-mini stereo cable (sold separately), you can connect your smartphone or other device.

    Plenty of Power for the Price
    Pair our AMP300 with the power-hungry speakers, and the sound quality will transform your listening experience. Rated at 350 Watts per channel peak power (470 Watts Bridged Mono into 8 ohms), the AMP300 can be configured as bridged or stereo. In bridged mode, you can combine the left and right channels into one audio channel which bumps up the power to a whopping 470 Watts (8 ohms). When playing dual sources, switch to stereo mode which reduces the power to 350 Watts per channel. It is the only high current 2 ohm load stable amp in the market.

    The AMP 300 also includes two sets of speaker outputs with front panel controls, auto-on signal sensing or 12-volt trigger, rear panel master level controls, dual line-level inputs with priority override switching and dual voltage of 110V/220V and auto signal sensing. This amp has a clean, brushed metal front panel with a volume control, power on and off button and a balance control knob to adjust the balance between the left and right channels and dial in just the right sound level mix. Special protection circuitry safeguards the amp from a short circuit.

    Warning: California's Proposition 65


    This product can expose you to chemicals, including vinyl chloride, which is known to the State of California to cause cancer. For more information, go to

    • Design Type: Class A/B
    • Peak Power Output: 350 Watts per channel
    • Maximum 8 ohm stereo output power at less than 0.2% THD+N: 150W
    • Maximum 4 ohm stereo output power at less than 0.2% THD+N: 235W
    • Maximum 8 ohm Bridged-Mono output power at less than 0.2% THD+N: 470W
    • Frequency Response: (20Hz to 20kHz) +0.0dB, -0.5dB
    • Impedance: 8 ohm to 2 ohm stable
    • Signal to Noise Ratio: -103dB referred to rated power at 4 ohms
    • Turn on options: manual on, signal sensing, and 12V Trigger mode
    • Unique Automatic Dual Source Priority Switching with Speaker Level Input Option
    • Automatic source switching
    • High Output Toroidal Power Supply, High Capacitance and Ample Internal Heatsink
    • Input and Output Terminals: Interrupting line input, main input/output, 12V trigger, speaker zone A output, speaker zone B output
    • Rack Mountable: Yes
    • Dual Source Switching: Yes
    • Dimensions (Lx H x D): 16.5" x 5.25" x 14"
    • Weight: 40 Lbs
    • Warranty: 2 years
    136 Questions asked
    Have a Questions?

    What's on your mind?

    Christopher • 12/17/2019, 2:17:43 PM I currently have a Yamaha RXA800 receiver for my home theatre system (with 7 speakers currently connected). I'd like to add 8 Polk Audio Atrium 30's and the Polk Audio Atrium Sub-10 for sound outside by the pool and patio area. Will the AMP300 and the SSVC6 be all that I need to power the 8 additional outside speakers? Also, the longest distance between the receiver and furthest most speaker is approximately 70 feet, will 14/2 wire work well? Any other guidance you can provide to this novice is greatly appreciated!
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Christopher: Interesting setup, you are on the right track. I would make a couple of suggestions for your system. The AMP300 will work perfect with the Yamaha Receiver connecting to the Zone 2 Output. I would go with our DSM4 speaker selector and add our OVC300 outdoor Impedance matching Volume Controls. You will find it much more practical having the volume controls located outside with the speakers for more control. I would connect each of the 4 pair of the Atrium 30's from the DSM4 with an independent Volume Control for each pair. You wire the 16/4 single conductor from the AMP300 to the speaker selector then out to the Volume Control. Then two conductor to each right and left speaker for the four zones. Set the impedance matching setting on the Volume Controllers to 4X. The DSM4 will be connected to the Speaker A output of the AMP300. Next you will connect the Atrium 10 subwoofer to the Speaker B from the AMP300. I would suggest connecting this with a OVC300 as well. You may find you will need to add a second Atrium Sub10. POLK suggest you need a single Atrium 10 for each pair of Atrium 30s but you may find grouping two pair with a single sub may work the best. You can tie the second Atrium 10 together with the first sub from Speaker B especially if you add the OVC300 impedance matching volume control. You would set the impedance matching switch to1/2x for the two Subs. Please let us know if you additional clarification. Good luck Note: I would connect the Yamaha Receiver Zone 2 Output to the Input #2 on the AMP300. That would leave input #1 for adding an iPod, iPad or laptop computer (with your iTunes Library). Input# would take priority as long as it is active. TL
    Brad Lozecki • 12/17/2019, 2:17:43 PM Hello I currently have a Onkyo NR 609 7.2 channel amp, a 6 zone Russond speaker selector, and Volume controls at all locations. VC = (Volume Controll) Upper Deck has 4 speakers controlled by 2 VC's (right side and left side Kitchen with VC Dining room with VC Upper Foyer with VC Office with VC Master Bedroom with VC Bathroom with VC On the rear of the 609 there is a zone 2 left and right (brings the 7.2 down to a 5.2) there is also a RCA zone 2 out L/R, if I use the RCA method the system will remain as a 7.2 if I understand it correctly however it says the volume must be controlled by the zone 2 amp,... Does the amp 300 have a master volume? the current way that i have it setup sounds ok but i want the speakers to sounds really good and i would like my outdoot speakers to sound great aswell not really just background music if you know hwat I mean, I would also like to add possible 2 more pair of outdoor speakers down by my pool, what are you thoughts and the correct products and wiring method, thanks Brad
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Brad, It sounds like the output on the ONKYO Zone 2 is fixed. The AMP300 does have a Master Volume Control. Set the volume on the AMP300 with all Volume Controls fully open (fully clockwise) so they are not attenuating the volume. Make sure the volume knob on the front of the AMP300 is full on as well. The Master Volume Controls are found on the back of the AMP300 (left and right). Once these are set, you can reduce the front knob to half way between max and min. As for your speakers, I would connect the Russound Speaker Selector to Speaker A Output of the AMP300. Use the selector to drive all your internal speakers. Then you can add a second Speaker Selector (like our DSM4) and connect to Speaker B Output then connect your two existing outdoor Volume Controls to the speaker selector. This will give you the option of adding one or two more pairs of outdoor speakers as well. The Speaker Selectors should have the protection circuits on disable (in active) where the Volume Controls are doing all the impedance-matching protection. This is assuming you have the Volume Controls connected to the Russound set at 8X, which is fine for all the speakers I am proposing to connect to the Russound (the internal speakers). The speakers on the outside through the second speaker selector would be set to 4X, which is where you connect a third and fourth pair of outdoor speakers. You would also have the flexibility to turn off any zone while controlling the volume in every location. I hope that helps, and please don't hesitate to contact me for further clarification at TL/MA
    Joe • 12/17/2019, 2:17:43 PM Would someone let me know if this Amp (AMP300 M16) comes with a remote control please. Thanks. Joe
    Customer Service • 12/17/2019, 2:17:43 PM
    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
    Chris • 12/17/2019, 2:17:43 PM I'm considering purchasing 4 pairs of speakers for the outside pool and deck area (4 RS850's, 2 LS3's and 2 AP850's) along with the AMP300 and a speaker selector--though not sure which one will work best for my application. My receiver--a Yamaha RXA800--is located in the basement with 7 speakers and a sub connected to it. I would like the capability of having someone watching a movie while those outside by the pool can be listening to music--iPod, etc. Do I need a dual zone speaker selector?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Chris, I recommend using our DSM4 as the speaker selector for your system. I would also suggest using Impedance-matching volume controls, one for each pair of speakers. Two OVC300s for the four RS-850 rock speakers, one OVC300 for the LS3s and a fourth OVC300 to connect to the AP850s We also recommend using OSD CL316/4 four conductor speaker cable to connect the AMP300 to the speaker selector (DSM4), then using the 16/4 to connect to each of the four volume controls. From the volume controls, you would use 16/2 two conductor cable to each speaker pair, one for right (+/-) and a second two conductor to the left (+/-). Check out the Aqua Blue connectors for terminating the rocks and LS3. The OSD CL3 is rated for in-wall installation and is direct burial approved. When you’re done, you’ll like being able to control the volume for each pair of speaker; however, do not use the volume controls as on/off controls. This is done with the on/off switch on the DSM speaker selector. Good luck and let us know if we can be of further assistance. Thank you for considering OSD branded products. TL/MA
    randy • 12/17/2019, 2:17:43 PM i'm considering this amp for my outdoor speakers that feed from my home stereo system. Will this amp power 4/100w speakers? Thanks
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Randy: Not only will this amp have plenty of power for your application but it features Audiophile sound quality. Great Choice... TL