A stereo 15W/ch kit of reasonable cost that could be built long before this thread becomes 50 pages long.
And a volume/tone control board is available for it too!
K4003: Velleman : 2x30 Watt Stereo Amplifier Kit : Electronic Kits & Projects
And a volume/tone control board is available for it too!
K4003: Velleman : 2x30 Watt Stereo Amplifier Kit : Electronic Kits & Projects
We just put one of these to use in our shop, works great, digital volume control, remote, Bluetooth, fm stereo and the usb input will play from where it was last shut down as well.
Just swapped the large capacitors out that came with it, sounds very good, especially for The price. Is available on epay for $5 less than amazkn.
https://www.amazon.com/Aiyima-TPA3116D2-Bluetooth-Amplifier-Receive/dp/B07BVHXQHT
Just swapped the large capacitors out that came with it, sounds very good, especially for The price. Is available on epay for $5 less than amazkn.
https://www.amazon.com/Aiyima-TPA3116D2-Bluetooth-Amplifier-Receive/dp/B07BVHXQHT
Yes, any 15W @ 4 ohm capable amp will work here.
Choosing a higher powered version as suggested by wiseold tech is fine; there are hundreds others.
Fully agree with keeping this thread less than 50 pages long 😀
An advantage with the smaller tpa3116 class d boards is that they typically run from an old laptop power supply (18 - 20 volts). Something to keep in mind is that these boards require a speaker load at all time when powered.
Op mentioned keeping soldering to a minimum, while maintaining a low price point, something to keep in mind before adding posts maybe, if wasting bandwidth bothers you.
Op mentioned keeping soldering to a minimum, while maintaining a low price point, something to keep in mind before adding posts maybe, if wasting bandwidth bothers you.
I narrowed my search to these 2 boards:
Which one do you recommend ?
Also, in the 2nd picture, what are those black parts marked with "100" ? They're missing from the 1st board.
- ZK-502L Bluetooth 5.0 Wireless Audio Digital Power amplifier Stereo board 50Wx2 Bluetooth Amp Amplificador power amp
- HIFI Wireless Bluetooth 5.0 TPA3116 Digital Power Audio Amplifier board TPA3116D2 50WX2 Stereo AMP Amplificador Home Theater
Which one do you recommend ?
Also, in the 2nd picture, what are those black parts marked with "100" ? They're missing from the 1st board.
Also found this board which is cheaper and doesn't have bluetooth:
2x50W TPA3116D2 Dual Channel Stereo Digital Amplifier Board DC 4.5-27V Class D
2x50W TPA3116D2 Dual Channel Stereo Digital Amplifier Board DC 4.5-27V Class D
I’d probably go for the second one in your previous post, as it has output inductors.
I would think the Bluetooth would be a great feature for a small amp. The latest 5.0 spec is pretty good on paper anyways.
I would think the Bluetooth would be a great feature for a small amp. The latest 5.0 spec is pretty good on paper anyways.
My speakers are 2x15w 6Ω so I'm thinking a power supply of 12V 2.5A/3A would be enough to power the amp board ?
That power supply would give you around 12-15 watts, should be enough for a desktop setup, or a small room I would think.
Other class-D amps to consider are those from Yamaha, YDA-138, YDA-148, and T-amps like TA2020, TA2024. Boards cost less than a hamburger, and are basically ready to plug and play. Combined with used speakers from yard sales/thrift stores/dumpsters, you can have very decent sound for ridiculously little money.
With any of these cheap amp boards, it wouldn't be unreasonable to run some basic performance tests on them, since a magazine reviewer determined that his amp came with improper output inductors that severely affected the frequency response.
With any of these cheap amp boards, it wouldn't be unreasonable to run some basic performance tests on them, since a magazine reviewer determined that his amp came with improper output inductors that severely affected the frequency response.
Last edited:
Considering the OP wants to use this system with his laptop and some cheap speakers, I wouldn't even worry about high fidelity specs.
Using a laptop as a source doesn't preclude high fidelity, and while I'm not familiar with his speakers, it's not unusual to find decent (even Stereophile-reviewed) 2-way speakers at thrift stores and yard sales for under $10 a pair.
I found the article: Australia's "Silicon Chip" magazine, May 2019, page 38. "Bargain Class-D Stereo + Subwoofer Amplifier Modules" using TPA3116D2. Treble was rolled-off, measured at 8 dB down at 20 kHz. Changing the output inductors from 55 uH to 10 uH fixed that. Other problems noted were poor channel separation at high frequencies (maybe due to coupling between the output inductors), and the subwoofer channel amplifier wasn't correctly configured for mono operation.
I found the article: Australia's "Silicon Chip" magazine, May 2019, page 38. "Bargain Class-D Stereo + Subwoofer Amplifier Modules" using TPA3116D2. Treble was rolled-off, measured at 8 dB down at 20 kHz. Changing the output inductors from 55 uH to 10 uH fixed that. Other problems noted were poor channel separation at high frequencies (maybe due to coupling between the output inductors), and the subwoofer channel amplifier wasn't correctly configured for mono operation.