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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?

    Tim • 12/17/2019, 2:17:43 PM 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!
    Customer Service • 12/17/2019, 2:17:43 PM
    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
    Todd • 12/17/2019, 2:17:43 PM I need to set up an 8 zone system in a therapy clinic with volume controls. I wanted to stream music from xm/sirius satellite radio. Will this amp accomodate the satellite radio receiver?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Todd, Absolutely! You can connect your Sirius/XM radio to the AMP300 with RCA cables. This is a high power amp that has dual inputs so you can have two sources connected to the amp and give one source priority for ease of use. CL/MA 1658
    Brian • 12/17/2019, 2:17:43 PM Hi there, I have been using an SSVC4 speaker selector for four pairs of speakers in my whole house audio system. I have picked up a second SSVC4 and the AMP300 as I am expanding. My plan is to run speaker wire from Speaker A to one selector and Speaker B to the other selector. I will need to use A and B at the same time occasionally. Will this work? The manual says to use A OR B.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Brian, There should be no problem running one selector off Speaker A and a second speaker selector off Speaker B. The SSVC4 volume control has internal settings for impedance matching. We ship the unit with the internal jumpers set to 2X. If you connect both speaker selectors and plan to play all eight pairs of speakers on a continuous basis, you may want to change the internal jumpers to 4X for both speaker selectors. You will need to remove the cover and expose the jumpers located behind each volume control. There are six pins for each. The jumper connects two pins at the same time. To set the jumper to 4X, you will need to cover pin numbers 4 and 5. That will insure both Speaker Selectors show an 8-ohm load to the amplifier. Then when you enable both the Speaker A and Speaker B at the same time, the amplifier will see a 4-ohm load well within its operating zone. The amplifier is optimized to work at 4 ohms (note it has a 2 ohm rating as well) which is why we refer to it as a high current power amplifier. When the impedance drops, the current demand increases. The amplifier also starts to generate more heat and the AMP300 has ample internal heat sink to handle the new demand. #1668 TL/MA
    Mac • 12/17/2019, 2:17:43 PM I have a Denon AVR-1913 that has "zone 2" capability available through the Surround Back speaker outs. Can I hook up to the AMP300 input with speaker wire from the Denon, and then run to speaker selector to power 3 pairs of in ceiling Polk speakers? This would (I hope) enable me to economically use the Airplay capability of the Denon and Android app remote to play internet radio and stored digital tunes in the rest of the house. The Denon is under powered to accomplish on its own.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Mac, Yes, you can use the powered speaker outputs into the speaker level input of the AMP300. This will become a signal level and allow any audio source that is playing through your receiver to be powered by the AMP300. CL/MA 1769
    Newton • 12/17/2019, 2:17:43 PM Purchased the AMP300 & SSVC4 driving pair of Rock speakers, pair of patio spkrs & 2 pairs of indoor spkrs. I have audio sources going directly to AMP. The indoor pair is disproportionately louder than the outdoor ones. For some reason the SSVC4 vol control for this one pair is.none responsive even turned all the way down to zero. Please advise
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Newton, Please switch the connections by swapping one of the indoor zones with the outdoor zone. See if the problem continues. If the volume for the problem zone still does not work, please email CL/MA 1922