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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?

    Joe • 12/17/2019, 2:17:43 PM I am planning on purchasing 6 outdoor rock speakers rated at 250 RMS each, 500w max, and I want to make sure that this can deliver enough power to them. My backyard backs up to a busy street so I need to be able to push louder music during the day. How much power can I expect to receive out of these speakers with this amp? The other option that I have is to purchase 125 RMS, 250 watt max speakers but I don't know if that will be loud enough or put to much strain on the speakers. The backyard is 50x60 with a pool. Thanks!
    Customer Service • 12/17/2019, 2:17:43 PM
    Thank you for you insight. This is helpful. I forgot to mention that the speakers are all 8 ohm as well. How would that measure with this amp and the OCD 300? I did want to get volume controls for each speakers along with speaker selectors. Being that the speakers are 8 ohms, how many watts can this amp deliver to each speaker if all 6 were turned on at the same time? Thanks again!
    Ryan • 12/17/2019, 2:17:43 PM If I want to run 8 (pairs) of speakers with this amp and a speaker selector how do you connect the speaker selector to the Amp? Do you use speaker A and speaker B output from amp?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Ryan: Yes, this amplifier will work for your application. You will have two options for Speaker Selectors. Option one we recommend the TSM-8 Speaker Selector that features internal Auto-Former's for speaker protection switch on the back panel. This has the best internal protection and power output when using the protection and not planning on using Impedance Matching Volume Controls for each room/zone. The second option would be to use our DSM-8 speaker selector that we would recommend using with Impedance Matching Volume Controls, one for each pair of speakers per zone. The DSM and ISS speaker selectors feature internal resistors which when enabled cuts the power handling in half (140 W down to 70 W for both the DSM-8 and ISS-8 models). So it is recommended using Impedance Matching Volume Controls to do the Heavy lifting (protection) and disable the protection on the Speaker Selector so it would be rated at 140 Watts. Checkout either the SVC-300 or VC-105 (featuring on/off switch) Impedance Matching Volume Controls Either way when you use the Speaker Selector you connect it to Speaker A only of the AMP300. TL/3893
    Edmund Cid • 12/17/2019, 2:17:43 PM I have just purchased the amp300 and ssvc4. what is the recommended connection between these two pieces of equipment knowing I have four pairs of speakers connected to the ssvc4.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Edmund: You can use our 16/4 four conductor cable between Speaker A output on the right hand of the AMP300 back panel; Right and Left (+ and -). You connect the other end to the Source A input located on the left side of the back panel of the SSVC4. Or you can use 16/2 two conductor; one for right and the other for the left input connections. This is referred to as a Speaker (High) level connection (after the signal has been amplified) versus a signal (low) level pre-amplified signal before it is amplified (this is connection for input to the AMP 300 RCA connections from your source). TL/3953
    Mike Karpinski • 12/17/2019, 2:17:43 PM Will this amp push my Cerwin Vega VS 150s ? I need more bass! My denon pma 920 isn't cutting it.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Mike: All the reviews on the Cerwin Vega points out that you need a true power amplifier not a Receiver. The AMP 300 is a True High Current Amplifier that when you are driving a 4 ohm like like the Cerwin Vegas are rated at, you will nearly double your current demand so you are looking at the AMP delivering 200 plus watts per channel and plenty of head room. Good choice... TL/4038
    Andrew Howard • 12/17/2019, 2:17:43 PM Will this amp push 4 AP850's like a boss?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Andrew: Run them in parallel off speaker A and drop the impedance down to 4 ohm. You will increase the current demand and get more output of the amplifier. You can run a pair of Speaker A and a second pair off Speaker B and have a little more control. Great combination. TL/4045