Power

[HighVoltage 329]

I recently changed my base to a JL 1000. My two 24 batteries dosn't power the amp properly. It cuts out without the motor running. What is the best way to solve the problem? More or bigger batteries, a small portable generator.

[h2oski2fast]

Does it have sufficient power and ground wire running to the amp?

[HighVoltage 329]

both wires are large about 1/2" D. going to a block to feed 2 amps.

[h2oski2fast]

how long and what other amps are in the system? Oh, and you really need to know what gauge the wire is before anyone can give you a educated guess as to which route to take. There are many factors that could cause the problem you describe, not just insufficient battery capacity.

[HighVoltage 329]

thanks for the help. took a look in the boat, the wire is 4g feeding an Alpine FRY-450 850w max and the JL 1000.
The JL is replacing a Phonix Gold SX1000 which didn't have the problem. Seems like the JL requires more juice.

[h2oski2fast]

thanks for the help. took a look in the boat, the wire is 4g feeding an Alpine FRY-450 850w max and the JL 1000.
The JL is replacing a Phonix Gold SX1000 which didn't have the problem. Seems like the JL requires more juice.
It probably requires more. Still need to know the length of the power wires? And what about the ground, 4 gauge?

[HighVoltage 329]

The ground is also 4g. As far as the length goes the wires are about 15'. The boat is a Hallett 240 closed deck. Speekers run by the alpine are 4 MB Quartz 6" in the side pannels. 1 base tube 8" in the cabin. The JL 1000 feeds 3 Eclipse 10" in custom boxes.

[h2oski2fast]

The ground is also 4g. As far as the length goes the wires are about 15'. The boat is a Hallett 240 closed deck. Speekers run by the alpine are 4 MB Quartz 6" in the side pannels. 1 base tube 8" in the cabin. The JL 1000 feeds 3 Eclipse 10" in custom boxes.
The power might be a little small for the 15' run. I would look at that first, maybe change it up to a 0 gauge or even a 1/0 gauge wire. I think you may be dropping too much voltage for the length of the run, and the other amplifier was not as sensative to the voltage drop. The batteries may also be going bad. I recommend the batteries to, and everyone has their own opinion on this, Oddysey Batteries. With the 2 batteries and the power you are running you should be able to get at least an hour at a good volume without anything cutting out do to voltage issues. There are other things to consider also like subwoofer impeidance.

[IT'SONLYMONEY]

are you sure your speakers and your amp are running at the same ohms. had that problem too. wired the speakers wrong with the new amp and it would cut out every time the bass hits. check your set up

[HighVoltage 329]

Thanks for the input, so is 2 more batteries or a 2000w generator the best way to go?

[IT'SONLYMONEY]

i run four batts. in my rig. four 12's, eight 6.5.s and two amps at about 3k watts of true rms power. i have three batts deticated to the stereo and one to start the boat. i can go all weekend with no troubles. knock on wood.
the gen is a cool set up. but you might want to check with your insurance first. if something happens and the boat was to burn up, they might not cover you when they find out that there was a gen in there. just heads up.
and again check your ohms

[BADASS38CHEVY]

The Jl 1000/1 amps require a minimum of 4 gauge. You are running 4 gauge to 2 amps.I would start there first.Also Like SWB said, load test those batteries.Those 1000/1 require lots of power.

[Outnumbered]

Cable Gauge Chart
To determine the approximate current draw (in amperes) of your amplifier (or amplifiers), you must calculate first the total power of each amp (multiply the number of channels by the number of RMS watts per channel). If you have multiple amps, add up the total power figures to arrive at a grand total. Next, double your grand total power figure. Then, divide by 13.8.
The resulting figure is your system's approximate current draw. Compare this number to the numbers in the "Amperes" column in the chart below. Cross-reference with the cable length (the distance from your battery to the amp mounting location) to determine which gauge of cable you need.
http://akamaipix.crutchfield.com/graphics/infolib/carlib/cablelength.gif

[BADASS38CHEVY]

You lost me after Cable Gauge Chart.

[Outnumbered]

His system is prolly capable of drawing well over 200 amps so I would prolly be running 1/0 gage (off the chart). I run 15 feet of 1/0 to power both a JL 500/1 and JL 450/4. Its a little over-kill but the system works perfect.