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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?

    Ed • 12/17/2019, 2:17:43 PM I have two ap650's and two ap840's along with one rs660om and one sub200. I was trying to run it from an old surround sound 5.1 system but my amp just can't handle it. Would this amp300 be a good option for me to run most of what I have? I would like all my speakers to play at the same time. Or at least 4 of them. (650's and 840's) Thanks for the help.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Ed, Yes! This is a high-current amplifier that can handle several speakers simultaneously. The amp has 2-zones, but you can run a multi-zone speaker selector off each zone, converting it to a 3, 4, 5, 6+ zone system.
    Ricardo Sanchez • 12/17/2019, 2:17:43 PM I want to connect 5 AP670 speakers and 2 AP650 (7 total) to this Amplifier. How should I connect them? I was thinking in connecting 2 series & 2 parallel into one channel (giving 8 ohms to that channel) and 2 series and 1 parallel into the other channel (giving 5.3 ohms to that channel). I was considering using the Bridged Mono function in this setup. Do you think this will work? Any suggestions?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Ricardo, The ideal setup would be to run the AMP300 to a multi-zone speaker selector and then to each speaker. A speaker selector takes a 2-channel input and divides it up into individual zones. Take a look at the ISS8 for example. Or, since the AMP300 has 2 zones, you could run a 4-zone speaker selector off each zone on the amp. So Zone A on the amp goes to an ISS4 and Zone B on the amp also goes to an ISS4. This would utilize the full power potential of the AMP300, while giving you individual zones with on/off control for each pair of speakers.
    Jean-Philippe • 12/17/2019, 2:17:43 PM Hi, I already bought the AMP300 and now I'm wondering how to connect my speakers. I originally planned for 4 outdoor speakers but I will need 6 speakers to cover the area properly. What is the best way to connect the speakers given that it's all the same zone? I'm thinking of connecting them in parallel (3 on one channel and 3 on another channel) which drops the impedance to 2.67Ω. What is the best way to acheive that? Using the bridged connections for speaker A (3 speakers in parallel) and the bridged connection for speaker B (3 speakers)? Thanks!
    Customer Service • 12/17/2019, 2:17:43 PM
    Hello Jean-Philippe, What most people will do is run a speaker selector off the AMP300 to convert it to a multi-zone system. Alone, the AMP300 can run up to 3 pairs of speakers off each of its 2 zones (A & B), but you will be limited to controlling all of them together rather than separately. By adding a speaker selector, such as the ISS4, you now have an individual zone for up to 4 pairs of speakers, with on/off capability on each zone. We also have speaker selectors that have built in volume controls on each zone, such as the SSVC4.
    Nicholas • 12/17/2019, 2:17:43 PM Hi I have a Yamaha V671 home theater reciver with zone 2 hook up to a Aton DLA/6 running my 2nd zone with 5 pairs of speakers I want more power can I use this amp to run 2nd zone
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Nicholas, This is the perfect amp for that! Give us a call to discuss!
    tom • 12/17/2019, 2:17:43 PM I currently have a 60v amp that powers 4 rock speakers, two additional outdoor speakers and two internal ceiling speakers in my study. As I understand the system, it runs in mono. The fidelity is pretty dull and I want to produce a more crisp, high quality sound from all the speakers, especially the outdoor sets. I have a volume control for the rockoustics and a separate control for the outdoor pair, and another for the ceiling pair. Suggestions??? thanks tom
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Tom, The AMP300 would be ideal for this type of application. The AMP300 by itself has 2 zones, each can run up to 3 pairs of speakers safely. However, you can run a speaker selector off the amp, such as our ISS6, and that would allow you to run multiple zones - each with their own on/off switch and/or volume control.