about a week ago i had 2 amps instaled one for my speakers the other which was an 1800 watt kenwood was pushing a 10' fiber glass jensen sub nothing special i was bumping and all the sudden the sub went out i checked the amp and the red light is on 'meaning its in protection mode, i tried to change both the fuses but nothing happend any one have any ideas? theres no way the amp could have blown pushing that ****in lil 10' sub..
anyone have any suggestions. please help!>>>

 

check to make sure you have a good ground. at least the same size wire as your power wire and all the paint is scrapped off where it is grounded to so its on bare metal.

 

dude why are you running a 1800 Watt amp?!? your 10' fiber glass jensen sub iswhat like 400 rms watts Tops! so i mean maybe you blew your speaker completely out ... or burnt out some wires.... get a smaller amp dude ...my subs are rated at 500 rms watts each and im using a 600 watt amp....

 

If you're running too much power to the sub, you could have blown it and created a short. Amps don't tend to like resistance that's almost non-existant.

 

ya most likely you friend something...

either your sub or amp.... and maybe both... MAYBE!!!!!

 

the easiest way and the fastest way to find out what happened is go to radio shack and get a $10 multimeter , it wont matter if its a analog meter or a DMM a DMM is going to be allot better ( Digital Multi Meter )


place your meter on OHMS . when you meter the sub it should read 8 Ohms ,4 Ohms or 2 Ohms ( this is after you pull the sub/s out and meter at the terminal not at the amp )

1) when you meter the subs and it reads nothing or like 13.00 or 150.00 OHMS then your sub/s are blown

2) when it reads 8 or 4 or 2 Ohms that's a good sign but then your sub might still be at risk , look around the sub make sure that everything inside the sub looks good EXAMPLE the voice coil is perfect and not torn or the terminal is not smashed

3) push the sub in and out from the front if it moves with easie and no grinding sound then its good , if it doesent move at all and its stiff then its bad (( make sure you push straight in and out and not from the side )) (( place fingers around the cone and press ))

so after you meter the sub/s and then it reads good and you looked around the subs and then did the push test get a 12 or 9 volt battery like from a drill and place wires on the ends of the battery and then tap them to the subs to see if it pulls or retracts

if it reads good , looks good pushes good and then pulses good then you have a good sub . try these steps and let me know how it went , then well go through checking your amp

 

ya a scratching sound means the subs trashed! most likely ya didnt set the gains properly......

or your amplifier was wired to low you overheated the amp and its toast..... quick way to test amp is just unplug the speaker wires.... if the amp still goes into protection then its definatly fried!

 

that's if the amp is not internally fried by now , sometimes the heat and overload could cause the amp to get fried permanently and unplugging the subs wont help but none the less give it a shot

 

ya thats what i ment.... if the amp goes into protect still its toast......

 

dont say that theres no way u could have blown the amp powering that little sub the amp can be blown from underpowering too just like speakers....but my best guess is that the protection light is on becuase is it stopping becuase the amp even knows its gunna blow the sub if it keeps pushing it