This may possibly be the most unusual question/system build that you have come across...
I work in a automobile manufacturing plant and we are allowed to have radios/music systems as long as they are battery powered. Most of what I have seen there consist of a couple or more of 6x9 car speakers, a head unit and a deep cycle battery in a cabinet. I have to work with what I can get my hands on and have come up with a design that seems, to me, pretty good.
I have a 4 Energy e:xl 15 bookshelf speakers left over from an old home theater that I have gutted and removed the drivers and crossovers from, a Lanzar MNX250 2channel car stereo amp(http://www.lanzar.com/sku/MNX250/100...sfet-Amplifier
) and 2 Lanzar MAX8 8" (http://www.lanzar.com/sku/MAX8/Max-8...-Ohm-Subwoofer
) subs to work with. All hooked up to an MP3 player.
The Energy speakers are 8ohm and will be wired in parallel/series to present an 8ohm or possibly a 2ohm load to the amp. The amp is rated at 250W@4ohm/350W@2ohm and I am assuming 125W@8ohm.
All of this must be run from a single 12v deep cycle battery for as long as possible.
The biggest concerns for me are volume and run time. I need to get enough volume to overcome the ambient noise of a factory setting but at the same time, I don't want to haul my battery home every night to charge it.
I have a couple of questions:
1.) Which will be a larger drain on the battery, an 8ohm load or a 2ohm load? Or does it depend on volume?
2.) I can't find the specs on the amperage draw for the amp to know what sort of battery to buy. What is a safe bet to buy as far as a battery to run the system for at least a 10 hour shift, but a couple/few shifts being preferable?
Thanks in advance....