2x2W at 4 Ohm Class-D Audio Amplifier Board

Brand:| Model: AA-AB32131
This high-quality dual channel Class-D audio amplifier board is capable of delivering 2W per channel of output power into a 4 ohm load.
  • Pre-assembled, pre-tested
  • Small size but big sound quality
  • Perfect Class-D architecture
  • Fully-bridged stereo output
  • Two channels—each up to 2W
  • Up to 88% efficiency
  • Does not require a heat sink for most applications
Part # 
Weight: 0.45 lbs.  
List Price$24.95
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Buy 4-up$12.00
Part # 320-306
Qty:  EA
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Product Details

2x2W at 4 Ohm Class-D Audio Amplifier Board

This high-quality dual channel Class-D audio amplifier board is capable of delivering 2W per channel of output power into a 4 ohm load. A PAM's PAM8803 IC offers ultra-low total harmonic distortion and noise, allowing it to deliver outstanding sound reproduction. Especially suitable for small speakers with an impedance of 4 or 8 ohms. This board can be powered by an external DC supply (4.5V to 12V) via a power port, 2.5V to 4.0V DC via a terminal block, or 2 to 3 AA batteries. Audio signal is input by a 2510 connector or 3.5 mm headphone jack, and volume control is adjustable by on-board buttons.

Specifications: • Output power (x 2 channels): 0.5W x 2 @ 8 ohms (<0.19% THD+N), 1.5W x 2 @ 8 ohms (<10% THD+N), 1W x 2 @ 4 ohms (<0.17% THD+N), 2.6W x 2 @ 4 ohms (<10.0% THD+N) • Frequency response: 20 Hz to 20 kHz (±3 dB) • Signal to noise ratio: 85 dB (22 Hz to 22 kHz, THD = 1% • Power supply range: 2.5V to 12V • 2.1 mm DC input jack • Dimensions (mm): 74.4 L x 54.8 W x 18 H.

2x2W at 4 Ohm Class-D Audio Amplifier Board
  • BrandParts Express
  • ModelAA-AB32131
  • Part Number320-306
  • UPC844632088117
  • Product CategoryAudio Amplifier Boards & Modules
  • Unit of MeasureEA
  • Product Rating
    (5 Reviews)
  • Weight0.45 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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2x2W at 4 Ohm Class-D Audio Amplifier Board
2x2W at 4 Ohm Class-D Audio Amplifier Board is rated 4.0 out of 5 by 5.
Rated 5 out of 5 by from Perfect solutionI needed to amplify a Samsung LED TV 3.5mm headphone (15mW/32 ohm) signal to power 2 kitchen soffit mounted - 8 ohm Boston 4" speakers. The Samsung replaced an old Toshiba CRT TV with an audio output of 1.5W at 8 ohms.Tech support recommended the 2X2W at 4 ohm Class D Audio Amplifier Board (by Sure Electronics), Model AA-AB32131 (Parts Express P/N 320-306). It worked beautifully. For anyone with a similar situation as mine, this is a perfect solution. I also bought a Project Box (P/N 320-430) and the Wired Home WHHCPS High Current Power Supply 12 VDC 1.2A (P/N 182-886). PS: Since the Samsung did not have stereo I wired the two speakers to the "ROUT-" and "ROUT+" terminals, which provided better volume than the "LOUT" terminals. Thank you Parts Express.
Date published: 2015-02-09
Rated 1 out of 5 by from Not impressed at allI bought this so I could craft a small stereo for my bicycle. Sadly, the quality of audio is simply terrible. Running it off my phone via the 3.5mm jack, the frequency ducks out between 1000hz to 8000hz, completely omitting the lyrics from most music. I tried a few different speakers, and got the same result. It almost sounds as if the amp is playing in mono rather than stereo, with a large amount of detail lost in any song I attempted to play. It also added a distinctly mechanical sound to all the tracks I played. Maybe I expected too much? The upside is that at full tilt, it does only pull 2mA.
Date published: 2014-08-09
Rated 5 out of 5 by from Great AmpThis is a great little amp. I am a gaming console modder and finding an amp like this is like finding gold. Check out the video of the Console mod I did using this amp.I will be using this amp in other projects both big and small.On a side note DOWNLOAD THE MANUAL!!!. I fried 3 of these boards because I didn’t know that the plug in header for power is good for 12 v but the terminal block is only good for 4 volts.
Date published: 2011-09-27
Rated 4 out of 5 by from Pretty Nice...This little bugger is going to be useful for a small set of 2" full-rangers I am building (computer speakers for desk at work). Quality is nothing special and I don't think it sounds as good as its big brothers or the SI T-amp but it's nice that it takes less batteries than the SI. I am powering it with 3 C batteries (chose the Cs as a good compromise between capacity and size). Also, the ability to run it on many different PSU voltages gives it some flexibility. The built-in volume control also gives some flexibility as you can use it or set it to bypass for a fixed 4db gain.Just for fun, I tried this little guy as a headphone amp at the suggestion of the previous reviewer. I am sorry to report that there is far too much noise to use this as a headphone amp--at least with a pair of Koss Pro3AA (which are a modest 60 ohms).
Date published: 2010-11-04
Rated 5 out of 5 by from headphone amp or preamp worthyuse this as a pre amp in line with a resistor for the larger amps for an amp project with volume controll. desolder the buttons and add a three way momantary rocker switch for a more durable volume controll. or just put it in a project box with 2 AA battery box and make a killer phone amp.
Date published: 2010-08-15
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Product Q&A

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who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
2x2W at 4 Ohm Class-D Audio Amplifier Board

I need to amplify a Samsung LED TV 3.5mm headphone (15mW/32 ohm) signal to power 2 kitchen soffit mounted - 8 ohm Boston 4" speakers. The Samsung replaced an old Toshiba CRT TV with an audio output of 1.5W at 8 ohms. 

Asked by: gary2
Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-01-26

I have a 12v 3.8a power source that is being unused and needs a job to do. Could i use this as a testing power source for this amp? I will be using this amp to push 2 Visaton BF32-8 drivers. I say testing power source because i am hoping to find battery..

Asked by: ryanv2
Yes that will be fine for powering this amplifier.
Answered by: MattP
Date published: 2014-02-06

Power plug size

Is the power plug 2.1mm or 2.5mm or something else? I can't find it in the manual. Thanks.
Asked by: ppprn
this is a 2.1 x 5.5 mm connector for the power.
Answered by: Chrisf
Date published: 2014-05-23

how many amps does this amp need.

Asked by: William67
Do you mean how many amperes does this amp draw?
Answered by: El Marko
Date published: 2014-05-23

Adding Volume Knob Control

Is there a way to add a volume knob control to this other than having just the onboard volume buttons? If so how and what do you recommend?
Asked by: Jake Mize
It's wierd that this beastie has those buttons on it, neverthelesss, the standard solution for amplifier modules is to use an appropriate volume pot. It is important to match the pot's impedance with the input impedance of your device. The closest value is 50k, so that's what I'm going to suggest... But then this is a weird board... I don't really have time to dig deeply into the manual right now...
Answered by: AlonzoTG
Date published: 2013-06-20

USB powered ??

Hello, to make a portable powered computer speaker, can I power this amplifier from the USB port of a laptop instead of using the power supply unit ? If so, is there an available USB cable with DC jacks to fit on this board on one end and USB jack on the other ?Thank you very much for answering !!
Asked by: soundaatma
Yes, it technically can be usb powered. I would recommend checking to see which usb port on the computer supports high power as some ports supply lower amperage than others. There are no "custom" USB cables and I would recommend googling USB Pinouts and testing with a multimeter to verify you are making the correct connections from the pins to the corresponding wires on the cut cable.
Answered by: DJN1
Date published: 2012-07-17
  • 2015-05-28T09:14CST
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