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Old Yesterday, 04:54 PM   #1
diyAudio Member
Join Date: Jul 2015
Default Portable audio

Hi all,
I am building a portable audio system that will be ran off of a 3.7v 5000mah battery. I am having trouble figuring out the best way of getting the voltage up high enough to power a good amp. Most of the amps I am considering require 12v. The amps that I have tried that run on 5v just don't get loud enough. This amp will be powering 2, 5 watt speakers. I would just make a battery pack out of several 3.7v batteries but this is a space limited project. So I have been considering some boost converters but most of them can't put out enough output power. Any suggestions would be great on getting the 12V or a better amplifier that runs on 5v.

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Old Yesterday, 05:44 PM   #2
diyAudio Member
Join Date: Jul 2013
Hi Kevin

You should check the Class D sub forum at this site. you can use a step-up-converter to produce 12v, but if they cant handle more than 5 watt, i am not sure if it is needed.

This amp delivers 2 x 3 watt @ 4 ohm from 5 volt
4X DC2 5 5V 2 3W Amplifier Board Class D PAM8403 Mini Digital Amplifier Board | eBay
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