Hi i bought this amp about a year and a half ago, and i had it wired stereo at 4 ohms, to two cheap jensen 10" xs bass single 4ohm voice coil subs. It worked for 3 days and the amp was only on 1/4 of the way, due to the cheap subs and i tink the rms on those were like 150. I was driving to my work, and it just stopped, it did go into like protect mode, so i turned everything off checked all my connections esp the ground and everything was good, i put a friends amp in and it worked great so i know the wiring was good, i got the manual for the amp and did what it said and had it on and unplugged the RCA's and speaker wires and was still in protect mode, what can i do, i took it to a local shop that is an authorized hifonics dealer and they looked at it and said it would cost me more to fix it than i paid for it. i just want to be able to use it and not have it sitting collecting dust.
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OK what you are saying now is that your speakers are dual voice coil; models? 4 Ohms per Coil? I have always used single 4 Ohm Voice ciol speakers since amps are mostly based on 4 Ohm outputs. but you can get 8 Ohm dual voice coil subs also. With 8 Ohms per coil you can get 4 Ohms if you parallel the wires. What is best for you and will get you the most stable power and still will be in the specs of that amp is to run the amp in BRIDGED MODE running each subs voice coils in series with each other then run those 2 subs in parallel to the amplifier giving it a 4 Ohm load. So, your will have two sets of wires from your amp 1 for each speaker. Then you will take a short piece of wire that will connect the + to the - of each voice coil then hook up the wires from your amp to each sub What it will be is 4 Ohms + 4 Ohms = 8 Ohms per speaker the 8 Ohms in parallel each speaker to the Bridged amp output using just the + from one channel and the - from the other will give you a total of 4 ohms and power out put of 600 Watts so that ends up being 150 watts per voice coil or 300 watts each speaker
The 2 ohm stable rating on the amp is PER channel meaning that you could effectively hook up a 2 ohm speaker or a 2 ohm load to each channel without the amp getting f"d up-butin bridged mode it will only be 4 ohm stable. to achieve a 4 ohm load with your sub the type x wire the coils in series that will get you at 4 ohms to run in bridged mono .But you will get the exact same amount of power if you wire each coil to one channel of the amp as bridged mono sees the sum of your 2 ohm channels combined-Hope that helps.
Start by checking and making sure that you have excellent connections at power,ground, and signal. Depending on the voltage output of your rca wires if you are running rca's to your amp typicaly your amp gain should be only at half - you may be clipping the signal if you have the amp set too high. On your deck you will want your bass settings at only half -again too much boost will cause clipping at the amp. with all your settings adjusted and all possible connections checked- the only thing left to check is the compatibility of your subs in relation to the amp-by that im referring to the overall resistance-measured in OHMS that you are placing on the amp.Your amp is probably rated at about 150wattsx2 at 4 ohms or 200+watts x 2 into 2 ohms or 400-460watts into a 4 ohm bridged load. Look on the magnet of the speakers and find out if you have single coils or dual coils and see what the ohms(resistance) of each sub (or coils) are rated at- ideally you would want a set of dual voice coil 4ohm+4ohm per sub- that way you can match the subs better with your amp.---- Heres a scenario that may or may not apply to you- i see it all the time so im going to share it with you---- If you have a set of single voice coil 4 ohm subs and you are trying to run them wired in parallel to the amp in bridged -then that is why you amp is shutting down- you will have to wire the subs in series until you either get different subs that will yield an overall 4 ohm load -or find a different amp that will take a 2 ohm load - okay for now try wiring the subs in series and see if it still sends out an overcurrent light on you-good luck
the amp is going into protect mode due to something wrong in the amp or some thing in the wiring to it ooh yea if you are getting 18v power to the amp that is way to high it should not be higher then 15v if the amp is in protect mode it will not play at all.
Sounds like one of two problems: either your subs are beginning or have gone bad, or you amp is going bad. What size power and ground wire are you using? You should be using at least a 4 gauge for both. Also what impedence are you running with the amp, ie; 4ohm mono, 2ohms stereo, etc?
If the speaker is a 4 ohm DVC (two 4 ohm coils), you can't wire it to get a single 4 ohm load. Try connecting one coil to each of the two rear channels. It may not be as loud but the amp should operate without going into protection.
If the two 4 ohm coils are in parallel, the amp is driving a 2 ohm mono load. That's probably why it's shutting down.