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Old 08-27-2018, 02:06 AM
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cal2vin cal2vin is offline
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Look for bad battery or improve my bank?

So hereís my situation that kinda has me baffled. A few weeks ago I went to Wakefest on center hill lake in TN. Let the stereo Wang all day without starting the boat to charge the batteries at all. Hereís what I had.

4 XS power xp2000 batteries which is 320 aH bank for stereo and an xs power d1200 as the starting battery. I use a 50 amp mastervolt chargemaster 12/50-3 to charge the stereo bank and a noco 4 amp charger to keep the starting battery topped off.

I was running. 4 JL Audio 8.8 towers powered by a wetsounds sd2 for about 300 Watts per speaker. Next was 2 JL audio 800/8ís powering 8 in boat JL m770ís at about 200 Watts each. Then I had two wetsounds XXX 12ís powered by a JL audio hd1200 EACH. Plus a JL Audio 12 inch infinite baffle in the stock location on a kicker cca1200.1.

After Wakefest two things happened. I read a post about the polarity of subs from one side of the boat to the other and switch the polarity on the port side subs which were the JL audio hd1200ís. It ended up being much louder in conjunction with the JL audio free air sub. Then I also added a 3rd pair of JL audio m880s on the tower. Powered by a wetsounds stx4 micro bridged to about 280 Watts per speaker.

Now my batteries are dropping below 12 volts and sometimes below 11 on heavy bass songs which causes the stereo to cut in and out as a whole. Do I need more batteries for what Iím running or look for a bad battery in my current bank? I plug them in to charge every night with the mastervolt charger.




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Old 08-27-2018, 08:38 AM
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I would definitely check for a bad battery
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Old 08-27-2018, 08:43 AM
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If I am reading this right, you have 6 amps in your boat. That is a lot of draw from any battery system. However, you may have a battery that is starting to fail and dragging the rest down.

You might also look at installing capacitors so help with the heavy loading of the batteries during hard hits of the music.
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Old 08-27-2018, 09:30 AM
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Itís actually 7 amps.
1. JL audio hd1200
2. JL audio hd1200
3. JL audio m800/8
4. JL audio m800/8
5. Wetsounds SD2 ( 2 ohm so 600x2 which gives 300 per speaker on 4 of the tower speakers
6. Wetsounds stx4 micro (bridged 285x2 for the other two tower speakers)
7. Kicker cxa1200.1

I know the power supply methods of the JL HD series amps can be pretty taxing on a system. As the voltage starts to drop it starts to draw more amps to keep the output at 1200 watts pulling he system down even further.

I have a load tester on the way. Iím starting to think itís just too much for the battery bank I have when everything is playing at full volume. I let them sit for 24 hours disconnected from each other and they were all without .01 volts of each other. 12.95-12.96.




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Old 08-27-2018, 09:45 AM
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Quote:
Originally Posted by cal2vin View Post
So hereís my situation that kinda has me baffled. A few weeks ago I went to Wakefest on center hill lake in TN. Let the stereo Wang all day without starting the boat to charge the batteries at all. Hereís what I had.

4 XS power xp2000 batteries which is 320 aH bank for stereo and an xs power d1200 as the starting battery. I use a 50 amp mastervolt chargemaster 12/50-3 to charge the stereo bank and a noco 4 amp charger to keep the starting battery topped off.

I was running. 4 JL Audio 8.8 towers powered by a wetsounds sd2 for about 300 Watts per speaker. Next was 2 JL audio 800/8ís powering 8 in boat JL m770ís at about 200 Watts each. Then I had two wetsounds XXX 12ís powered by a JL audio hd1200 EACH. Plus a JL Audio 12 inch infinite baffle in the stock location on a kicker cca1200.1.

After Wakefest two things happened. I read a post about the polarity of subs from one side of the boat to the other and switch the polarity on the port side subs which were the JL audio hd1200ís. It ended up being much louder in conjunction with the JL audio free air sub. Then I also added a 3rd pair of JL audio m880s on the tower. Powered by a wetsounds stx4 micro bridged to about 280 Watts per speaker.

Now my batteries are dropping below 12 volts and sometimes below 11 on heavy bass songs which causes the stereo to cut in and out as a whole. Do I need more batteries for what Iím running or look for a bad battery in my current bank? I plug them in to charge every night with the mastervolt charger.




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Add the power output from each amplifier, then divide it by 12.5 and post your results.

You wrote that the stereo bank capacity is 320Ah and if you divide 320 Ah by the total output in Amperes, you'll find that multiple 1200W amplifiers and some others added in will use that reserve quickly and cause significant voltage drop.
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Old 08-27-2018, 09:57 AM
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Jesus... 7 amps??? I have 3 and that’s plenty lol
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Old 08-27-2018, 10:20 AM
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Yep haha I could provide power to everything with far less amps but I would not get the power per speaker I wanted. Output can stay plenty loud and unclipped signal with the extra amps I have. Iím the only one that touches my volume and I listen very closely for distortion. As they always say. Distortion kills speakers. Not power.

@jimN do you mean add power output in Watts or amps? In Watts the output would be 800+800+1200+1200+1200+ 1200+ 570 = 6770 Watts. So divided by 12.5 thatís 542. I donít know the amp values of each amp. I would need to look them up.




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Old 08-27-2018, 09:52 PM
MLA MLA is offline
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Reversing the polarity of one woofer will not change anything about how the amp is working. it could correct a phase issue, making it sound better, but the amp still sees the same impedance load.

Adding the micro likely only added about 10A draw to the system.

Id look for a bad battery or the pack not getting up to full charge due to a charger issue.
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Old 08-27-2018, 10:19 PM
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cal2vin cal2vin is offline
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Quote:
Originally Posted by MLA View Post
Reversing the polarity of one woofer will not change anything about how the amp is working. it could correct a phase issue, making it sound better, but the amp still sees the same impedance load.

Adding the micro likely only added about 10A draw to the system.

Id look for a bad battery or the pack not getting up to full charge due to a charger issue.


Ok. Whatís the best way to look for a bad battery? I have a 100 amp load tester on the way. The charger seems to get them up to the correct voltage and then when they come off the charger and I check the the voltage the bank rests at 12.97 for days. Doesnít that mean itís charged?

Calvin


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Old 08-28-2018, 08:19 AM
MLA MLA is offline
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Quote:
I have a 100 amp load tester on the way.
What kind of tester?

Quote:
I check the the voltage the bank rests at 12.97 for days. Doesn’t that mean it’s charged?
Right now, they act as one large battery. That voltage represents an average. You would want to separate the pack and charge measure each battery separately. You may find one is being propped up by the other 3.
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