how much battery drain on two amps

ok, ive got a boat with two deep cycle marine 900 cold crankin amps batteries ran in series "im pretty sure they're in series". ive got 2 pioneer gm6100f(60w x 4) amps. the amps have just 8 gauge wire running to them at 20'. how long do you think these amps could run at low to medium volume before the freshly charged batts run down? my guess is around 6-7 hrs. what do you think. owner of

Motion Marine & Car Audio

the florida keys

I'm not an expert on boats so is there any kind of chraging system?Nik

Jeeputer Progress

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yes, but im wondering this info without any charging. technically he could start up the engines every once in a while to make sure the motors have power.owner of

Motion Marine & Car Audio

the florida keys