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Also could be that the power wire and earth wires going to amp are to thin amp could be heating up and could be going into protection mode. Will switch on after it cools down what gauge wiring are you using?

Lightning Audio... | Answered on Oct 29, 2018


You could measure the voltage into the 20gauge and the voltage out while the system is under load and see how much the voltage drops.
Ideally there should be little difference.
Or -
Replace the 20-22 temporarily using 16 and see.

Lightning Audio... | Answered on Feb 06, 2018


The question is not very clear, but I assume that you blow the main fuse when you connect the amplifier to the battery.
First make sure that you have the correct fuse rating (amperage) installed. Then try connecting the power to the amp with the speakers disconnected. If the fuse still blows, you have shorted output transistors in the amp. This could be expensive to repair. If the fuse does not blow, your speakers could be short circuit as well. It is very possible that both the amp and the speakers are shorted.

Lightning Audio... | Answered on Jan 31, 2018


I looked up the specs for the amplifier
  • 4 ohms: 85 watts x 2 channels
  • 2 ohms: 125 watts x 2 channels
So it will take 2 ohm speaker loads, therefore you can parallel 2 speakers together, that is to say connect 2 speakers to the + and - terminals of the left channel and 2 to the right.
4 ohms paralleled with 4 ohms = 2 ohms
So you are OK

Lightning Audio... | Answered on Nov 11, 2017


RCA cables are the best way to get the audio from your head unit to the amp. If your head unit doesn't have RCA outputs, you might be able to use the speaker outputs of the head unit to connect to the "high power" or "high level" inputs of the amp, if the amp has such inputs (check your manual).

Lightning Audio... | Answered on Jan 07, 2017


Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Double check all connections .A thumbs up would be greatly appreciated if this answer is helpful to you.

Lightning Audio... | Answered on Jan 06, 2017


check and try finding another grounding spot

Lightning Audio... | Answered on Jan 06, 2017


hi were can i buy a power connector cable. a lightning audio s4.300 im in new zealand auckland 02102644759

Lightning Audio... | Answered on Nov 22, 2016


are you sure there is a power plug needed for the amp? very few amps require power plugs. you merely have to run wires to the power terminal. the power terminal should be labeled - pwr (b+), grnd, and rem.

Lightning Audio... | Answered on Jun 04, 2016


Take the peak to peak power rating and multiply it by .727
that should be the RMS watts.

You don't have to worry too much about new stuff, but if you are using an older stereo amplifier that is rated for 8 ohm speakers then you should not use 4 ohm or they will pop the finals in the amp.
You could use 2X 4 ohm speakers in series on every channel and it should be ok.

Lightning Audio... | Answered on Jan 31, 2015


No question posted i assume you have an issue? If not wanting to know about them? They are solid amps. Made under rockford fosgate. Please post more info.

Lightning Audio... | Answered on Jan 06, 2015


it sounds like one channel in your amp had shorted and letting dc go to the speaker...a speaker is an electromagnet and requires ac to make it pulse..the amp has a blown channel and would have to be repaired and a factory service center...there is no quick fix..

Lightning Audio... | Answered on Jul 28, 2014


Make sure the remote turn on cable is connected correctly and fuses on the amp are not loose. But first off jump power from the power terminal to the remote terminal to see if it even turns on. if it does not then the problem is something blown inside the amp. Is there a fuse under the hood? if so make sure it is not blown.

Lightning Audio... | Answered on Mar 31, 2014

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