|Item Weight||0.3 ounces|
|Package Dimensions||2.6 x 1.9 x 0.8 inches|
|Item model number||090155|
|Item Package Quantity||1|
DROK Super Small 3W+3W DC 5V Audio Amplifier Handy Digital Power Amp Module Board Dual-channel PAM8403 Stereo Amplifiers with Potentiometer for DIY portable
|Price:||$8.55 & FREE Shipping on orders over $25. Details|
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- Super small Size (30×22×16mm, NOT included the handle of the potentiometer ), light weight, handy and easy to install
- Flexible power supply: the module can easily run off three AA batteries, a USB Cell phone charger, a rechargeable Cell phone charge pack
- Top notch potentiometer, easy and smooth to adjust the volume and control the power switch
- Crisp and Clear sound output, low noise, give you best hearing enjoyment
- Please note that do NOT connect to power if you do have the speaker connected, or will wreck the module
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PAM8403 Mini Power Amplifier Board.
Dimension:30 x 22 x 16mm (do not including potentiometer handle)
Operating voltage: DC 3-5.5V
Max output: 3Wx2 (5V 4Ω)
1.You can use USB port on computers to offer 5V power supply for the amplifier board
2.Potentiometer with switch, can adjust the volume and control the power switch
3.Suitable for battery or portable electronics products,suitable for long time steady usage.
4.Please make sure operating voltage less than 5.5V, or the module will be damaged
5.Without reversed connection protection, meaning the module will burn if wires are connected reversely
1x Mini Amplifier Board
Top customer reviews
Highly recommend looking up PAM8403 before buying this. Sure, you can hook it up to a basic usb power supply add you in/out connections but you will get the most out of it by understanding what other things you can do to make it go even further, and what things NOT TO DO.
A couple tips from the datasheet: DO NOT CONNECT POWER IF YOU DO NOT HAVE THE SPEAKERS CONNECTED. It could wreck the chip before you ever hear it. Absolute Max Volts is 6. Anything over 5.5 is DISTORTED 10% for sure - keep in mind that's configurable with the volume.
This chip works best with 4 ohm speakers. 8 ohm can work, but the amplification power is about 1/2 of the rated output.
You will do best matching your output to the rated need of your speakers. If the speakers say 2w or lower, you are probably okay. 3W is roughly the maximum per channel this can do, at the absolute highest working and recommended volts (5.5) and watts (2.5), so your max amps (current) is about 500 milliamps. (you can get the milliamps from the power brick you use). Not to say you can't use a higher MA especially if you use a regulated power supply like for a cellphone, but the closer you can get to these numbers, the more predictable your results.
I bought this as a little hobby project. I wanted to use this for a white noise generator so I didn't have to plug into my bedroom speakers. I'll add a picture below. I added a couple 4 ohm speakers to this (1 internal mount, and one of those full range "portable" speakers affixed with hot glue) used a cellphone usb type supply, connected a source and voila.
The datasheet has lots of great tips. If you have a ground wire, you can couple the speaker outputs to ground using some small capacitors, 220pf are recommended, do not use electrolytics for best results. This will reduce buzzing and outside interference.
Not being used for loud volumes I didn't bother with this and it isn't a problem. Generally good performance for the tiny cheap speakers I used.
This isn't Hifi. 1% Distortion is considered terrible at reasonable volumes. But, for many applications, this is fine.
State of hifi right now is .0001% Distortion at reasonable levels and even lower has been recorded.
But have fun, this is a nice little starting point. I certainly enjoyed it and it now has a home in my home doing something useful.
As a 3W amp, it delivers what you'd expect and there are many out there. I picked this one up because of the included knob and pins. Turns out, the know isn't that great and will need to be replaced with a nicer one and the pins ended up not being used, but instead jumper wires were soldered directly to the board (why solder pins and then attach wires — just solder wires)
However, because of the position of the potentiometer, mounting this has proven difficult on even thin material. The pot is mounted 1mm or so back on the board necessitating the use of a spacer (which then limits the thickness of the faceplate).
• Powers up with USB-style power
• The on/off of the potentiometer is nice.
• The pin-only configuration is nice... no on-board jack which makes custom configurtion easier (with off-board jacks)
• 2X the price of others
• Design flaw makes use in a case hard
• Knob and pins not that nice/useful
At $9 each, this is not ideal... there are other vendors who sell the identical board for less than $4 each (without the knob and pins, but...)
I'm testing dozens of boards from different manufacturers for use in a production run and this one didn't make the cut...
In this particular project the DROK 8403 is driving two Gikfun 2” 8 ohm 5W full range speakers. The amplifier and speakers match up pretty well. Unfortunately, there are few 2” speakers to choose from. I tested the two speakers on a PAM8610 10W 12V amp and these speakers could nearly handle the amp at full volume, but started to clip towards the peak. I cold tweak the volume on the input and the amp to obtain a pleasing sound.
I am impressed with this little amp. Note this amp board is very small, and if you have large hands and/or poor eyesight, this little board could prove difficult to solder.
Here is a sample of how the DROK 8403 amp sounds in an Oliva Nub Cameroon 464T cigar box measuring a mere 7" W X 5" T X 4" D. This cigar box amp probably weighs less than one pound. The cigar box amp delivers an incredibly clean and relatively loud audio output, considering the amplifier is only producing 3 watts.