Bench test setup

I am sorry if this has been discussed. I searched various ways to describe my question with no results.

Here goes. I have built a test bench to test sub enclousures, amp performance, speakers, etc...

I am currently powering a head unit and 2 amps (one 4 channel and one MONO block) at about 800W RMS total. I am running these from a deep cycle marine battery, connected to a 6a battery charger.  I am never seeing over 12.8V under load,  I want to add a wall power supply   (13.8v) to replace the batery charger.

Do I need to purchase a 30a + if I plan to keep the battery connected, just to keep it charged? I can't remember if the battery will carry the current draw and a power supply will recharge the battery from wall voltage like an alternator. If this was the case, could I use  something like a 13.8vdc, 15a (continuous) and get away with it? It would be much cheaper.

If anyone has tried this, let me know the results.

Thanks!

Tucker

Autos For You, Inc.

Thanks for the input.

Thats what I was trying to find out. If  I had to go with a 50a power suppy or if I could get away with a smaller one if I used a battery along with it.

I don't see if the bench was only hooked up as I was using it, how it would be any different than an alternator recharging the battery when the car is on as far as fire hazards.

But oh well,  a power supply looks like the easier way to go anyway.

Thanks,

Tucker

Would that 40/50 (peak) unit power an 1100Watt RMS 1500 Watt Peak Directed audio Amplifier? I'm running a diamond audio TDX 15" sub, and would like to have constant power to it, I figured I'd need at least 100 amps (seeing how my 91 Probe with it's 60 amp peak alternator can't handle it) Whatdya all thinK Thanks!

-Jordan