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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?

    Jon • 12/17/2019, 2:17:43 PM I have 4 outdoor speakers (speakerstone) and each one is rated at 250W/ 8ohms. Will this amp be suitable?
    Customer Service • 12/17/2019, 2:17:43 PM
    HI Jon: This AMP300 will be perfect for your application. Connect one pair to Speaker A and the second pair to Speaker B. With both speakers playing (connected in parallel) the AMP will see a 4 ohm load (235 watts per channel output split between the 2 pair, plenty of output). TL-2141
    Kevin • 12/17/2019, 2:17:43 PM Hello. Is this item sufficient for driving two pairs of speakers (4 total) simultaneously to a Zone 2? What would be the total output to each speaker if all 4 were playing at the same time? How would it differ from the 250 Watt setup?
    Customer Service • 12/17/2019, 2:17:43 PM
    HI Kevin: This AMP300 is a great choice for your application. You will want to connect one pair to Speaker A and the second Pair to Speaker B. This creates a parallel connection which lowers the output to 4 ohm almost doubling the output power of the AMP. This Amplifier is a High Current Amplifier that is built to drive a 2 ohm load. Not only does it supply the needed current but also uses totally discrete components for a true Audiophile experience. TL-2145
    Peter • 12/17/2019, 2:17:43 PM I am installing whole house audio with 8 inside zones and 3 outside zones each with their own volume control. What amp and selector combination should I consider?
    Customer Service • 12/17/2019, 2:17:43 PM
    Peter, Run the AMP300 to a TSM12 speaker selector with the volume controls. That should prove to be a nice combination. Thanks!
    Jesse • 12/17/2019, 2:17:43 PM I'm interested in purchasing this amp to run 2 pairs of Bose 151 SE outdoor speakers. I would like to add some bass to my system. Do I need to purchase an additional amp to push the subwoofer? because I see no sub output in this amp.
    Customer Service • 12/17/2019, 2:17:43 PM
    HI Jesse: You should have no problem connecting and driving the two pair of BOSE 151 SE off of Speaker A wired together in Parallel. You have a couple of choices for the Sub woofer. You can look to connect a passive Sub woofer as long as it has a built in crossover. First I would recommend adding two OSD OM-SUB200. One for each pair of the BOSE 151 wired in line with the Sub. Then output Speaker A to one of the OM-SUB200's then connect the one pair of the BOSE 151 to the output of the first OM-SUB200. Then repeat the same to the Speaker B output to the second pair of BOSE 151 to the output of the second OM-Sub 200.The OM-SUB200 has an internal crossover that will provide the right low frequencies to the 8" passive sub woofer. You can also add our SMP-250 dedicated Sub woofer amplifier along with a passive sub that does not have or need a internal crossover since the crossover is built into the SMP-250 sub amplifier. The first option is a great value that will take advantage of the AMP300 output capability. TS-2206
    Mike • 12/17/2019, 2:17:43 PM I see that this amp only has two source inputs. What other peice of equipment would i need to have four sources.Example( AM/FM stereo, CD, IPod, Satelitte Radio. I am all so installing a single speaker and volume control in each room but would still like to enjoy the sound of stereo. Getting ready to wire the house this Saturday and recomendations? Thanks,
    Customer Service • 12/17/2019, 2:17:43 PM
    HI Mike: The AMP300 is a two channel stereo amplifier that features automatic priority source switching. You have a couple of choices to have multiple sources (two or more as in you example). You can go with a basic 2 channel stereo receiver and connect to the pre-amp outputs from the Receiver to the RCA inputs of the AMP300. And just in case the Receiver does not have pr- amp outputs you can connect the speaker outputs (right and left +/-) to the High level inputs of the AMP300. The Receiver has the pre-amp built in which would allow input and switching between your multiple sources. The flexibility of the AMP300 will give you multiple options for the connection. The Receiver will also control the Volume Levels more effectively. A second option is to connect to an Home Theater Amplifier that features a second zone pre-amp output that would connect to the AMP300 and the pre amp would be in the AVR. I am hoping you used four conductor (right and left +/-) to each room and then utilized Dual voice coil stereo speakers to your three separate rooms. Checkout our OSD-ICE-840TT for the single stereo speaker application. The stereo volume control like our SVC-300 works perfectly with these speakers for your application. TS-2214