How do you make a guitar amplifier 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?
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.
http://www.bdbatteries.com/rvflyer.php?i d=9
Get a little box for it here and you have a really nice setup that folks won't complain about.
http://www.bdbatteries.com/batteryboxes. php?id=152
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.
http://www.powerstream.com/dc-2171.htm
So you are completely mobile for $150
Battery chargers are $30 - $400. Any of these will do.
http://www.bdbatteries.com/chargers.php
http://www.duracellpower.com/backup-powe r/default.aspx















The body itself looks a little like a shrunken Les Paul Jr., which, when flipped over, reveals the nine-volt battery compartment for the onboard LR Baggs
I also use pretty high-end equipment, like a quality CD player, DAC and headphone amplifier to test headphones, so all the nits I pick represent critical, 




