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Why is my amp shutting down or going into protect mode

Amps and subs have to be set up to what ohms they can do

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What should my setting be on car stereo...Keeps shutting off subs at half available volume.


If your amp is shutting off when you turn up the volume it means that it's clipping. This is very bad for both your subs and amp. The reason this happens is because your amp doesn't supply enough wattage for your subs and the capacitors are being drained of power causing your subs to cut out. As far as ohms this is not a setting. It is resistance and is very very important to have your ohm load correct or it can cause damage to your amp n subs. For a better understanding of ohm loads visit http://www.the12volt.com/caraudio/woofer_configurations.asp and put the number of subs and the ohm value and it will give you the wiring diagrams for the different ohm loads. then u need to look at your amp manual to see what ohm loads it is stable at.

May 14, 2014 | Virtual Reality VR3 Car Amp

1 Answer

500/1 settings to run jl13w6 v2 d-4


Just had a look at both amp and sub on the JL Audio website. The amp runs from 1.5-4ohms. 4ohms at 14.5V. The sub is running dual 4 ohms coils. That's what the D-4 means. So should be an easy set up. The amp has two mono outputs, so one for each coil. It looks like the perfect wattage to run the sub real nice.
Web page for amp: http://mobile.jlaudio.com/products_amps.php?amp_id=439
Web page for sub: http://mobile.jlaudio.com/products_subs.php?series_id=18

Nov 19, 2008 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

Connecting a subwoofer to a mono amp that has 2 sets of terminals


ok this gets confusing sometimes. Ok first look to see what ohm your subs are. If you have a dual 4 ohm sub When you run that on sub + to + and - to - then that will make that sub 2 ohm. its different on ohm if the sub is say a 8 ohm then putting the wires that way will bring that sub to 4 ohm. Now lets say you have 2 subs that are dual 4 ohm and wire both of them + to + and - to - and go bridge the amp which would be both wires from sub both + together and both - wired bridge on the amp will make it a 1 ohm to the amp. Please post what ohm your subs are and i can tell you alittle more about it

Oct 21, 2008 | Verge VGA300M Car Audio Amplifier

2 Answers

dual voice coil wiring to class d amp


The easiest way to think of wiring voice coils and subs is this:
  • Two items of the same impedance in parallel = Half of the impedance
    • 4 ohms in parallel with 4 ohms = 2 ohms
    • 8 ohms in parallel with 8 ohms = 4 ohms
  • Two items of the same impedance in series = Double the impedance
    • 4 ohms in series with 4 ohms = 8 ohms
    • 8 ohms in series with 8 ohms = 16 ohms
In this case, you want to wire two subs, each with dual 4 ohms voice coils, so that the total equals 2 ohms. Your options are:
  • DVCs in parallel, 2 subs in series = 4 ohms
  • DVCs in series, 2 subs in parallel = 4 ohms
  • DVCs in parallel, 1 sub = 2 ohms
With two, dual 4 ohm subs, you can only have 1 ohm or 4 ohm total impedance.

Mar 16, 2008 | Car Audio & Video

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