How do you make a guitar amplifier battery powered?
Brittany asked:
I have a 11.2 Watt First Act guitar amp and I was wondering if it’s possible to modify it from using a 14V power adapter to making it battery powered?
I have a 11.2 Watt First Act guitar amp and I was wondering if it’s possible to modify it from using a 14V power adapter to making it battery powered?
Just buy one of these batteries and plug your adaptor; at only 11.2 Watts, they should last for quite some time.
A battery is a power tank. The longer you want to jam, the more batteries you need. At 11.2 watts, you need 2.33ah per hour of battery bank (11.2 watts/12volts * .8 for inefficiencies * .5 battery DOD) = 2.3a.
Long story short, this 33 ah battery is 14 hours of jamming, weighs 33 pounds, and you can get one here under $120 delivered. UL Listed, made in the USA, and designed for use indoors, it won’t spill acid.
Get a little box for it here and you have a really nice setup that folks won’t complain about.
Next you need to regulate the voltage coming from the battery to the amp. To get a 12 volt battery to run a 14.4 volt load, you need a transformer. This one goes from 12-15 volts at 50 watts, the voltage you need with more power than you can use for roughly twenty bucks. Tell them BD Batteries referred you.
So you are completely mobile for $150
Battery chargers are $30 - $400. Any of these will do.