#578 in Home audio receivers & amplifiers
Reddit mentions of DROK Micro TDA7377 DC12V Digital Audio Power Amplifier 35W+35W 2.0 Dual-channel Stereo Amp Board Amplify Module for 20-120W 3"-10" Bookshelf Speakers Floor Speakers
Sentiment score: 1
Reddit mentions: 4
We found 4 Reddit mentions of DROK Micro TDA7377 DC12V Digital Audio Power Amplifier 35W+35W 2.0 Dual-channel Stereo Amp Board Amplify Module for 20-120W 3"-10" Bookshelf Speakers Floor Speakers. Here are the top ones.
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Adopt TDA7377 four-channel power amplifier chip, good sound quality.2.0 dual-channel 35W+35W power amplifier can support 4-8Ω 20-120W 3''-10'' bookshelf speaker, floor speaker.Both power supply input and the audio output use terminal block, easy to install without electric iron.Audio input adopts 3.5mm Universal stereo jack, you can easily connect the amplifier to phone,computer,MP3,IPAD.The power supply uses 4700uf filter capacitor which provides abundant power to the power amplifier.
Specs:
| Number of items | 1 |
| Size | Amplifier Board+Power 35W+35W |
| Weight | 0.25 Pounds |
I would consider getting a DAC/AMP hat for your Pi, it may not be the cheapest option, but it'll be neat and simple:
https://www.hifiberry.com/ampplus/
http://www.iqaudio.co.uk/home/9-pi-digiamp-0712411999650.html
If you are committed to cheap as possible, make sure the USB soundcard is compatible with Pi Musicbox and look at cheap class D amp boards on Amazon, Ebay or AliExpress. Something like this may fit the bill:
http://www.amazon.com/DROK-Amplifier-Dual-channel-Bookshelf-Speakers/dp/B0181Z4M4A
Although that one is a class AB I think (it'll get pretty hot).
You'll also need a power supply for the amp.
Check out /r/diyaudio for more infos.
I want a portable speaker for my truck and for my work.
I have an amp, the speaker and 2x 12v/7AH Sealed Lead Acid Batteries. What would be the proper way to wire this amp to the battery, and charge the battery when needed?
If the one has anything close to 200w, most of that would have to be the subwoofer channel. I'm deeply skeptical.
The Lepai is not an amazing amp. According to one reviewer, his bench tested at a realistic 7w per channel, nowhere near the 20 advertised. But it gets the job done, it's compact, reasonably well built, and it's a proven design that lots of people use. My Lepai drives my commercially-made 2-way 8-ohm bookshelf speakers quite well, JBLs and Polks. It does NOT like my Carmody Classix IIs, which are lower sensitivity than the big-brand ones. They pop and break up if you try and push it, which does not happen when I run them off my 85w/channel Yamaha receiver.
Remember that if the battery life is an issue, and for a suitcase boombox I assume it will be, the Elegiant is most likely going to pull more current than the Lepai in order to power the subwoofer channel. I'd keep it simple here and go with the Lepai.
If you're willing to buy something that's basically a bare board without a case, there are more options.
This one claims 50 watts/channel and has integrated bluetooth, but no minijack input.
This one doesn't have bluetooth but it's extremely cheap and claims 35w/channel.
In pursuit of keeping costs down, would the GRS 3FR-4 sound significantly worse? Also, what do you think of this amp? It is cheaper and the layout works for how I want to setup the speaker.
Sorry for so many questions. There are so many options and I'm new to this. Having a hard time narrowing down what will be the best choice for my project.