Posted March 13, 200718 yr I have never had this problem untill I started using my FI sub...So hopfully someone can shed some light on the subject..When hitting major bass notes on full tilt, the amp shuts off and shows CUR..Which is excessive current.What is this and how the hell do I fix it?
March 13, 200718 yr Author Jesus, i am just out of it today...Sorry its an Alpine M1005 and Im using a dual 1ohm voice coil wired to 2ohms...
March 13, 200718 yr From reading other forums it seems that many others have had the same problem. I understand that these amps will do that when they started clipping-have you checked your input level?Have you checked all your wires, ground, power, and even those going to your sub? I'd start by checking all the wires, even if it means pulling the sub out and checking the back of it too.
March 13, 200718 yr Jesus, i am just out of it today...Sorry its an Alpine M1005 and Im using a dual 1ohm voice coil wired to 2ohms...Are you sure you are actually running at 2 Ohms? Did you check with multimeter?
March 14, 200718 yr Author How do I check with my DMM?I am pretty sure. I mean its wired.. - of Coil 1 to + of coil 2 and + of Coil 1 to amp and - of coil 2 to ampTejcurrent:I wondered if It had something to do with that. I believe I am clipping so i kept it turned down. One setting was messed up after i set it with the DMM so that is entirely possible...That was on my list of things to do for sunday.I have checked all the wires and everything seems good. Edited March 14, 200718 yr by Grim
March 14, 200718 yr Excessive current means the speakers is asking for something the amp can't provide... So the amp clips and goes into protect to protect the sub (it's a no no to send a sub a clipped signal)...DMM the amps voltage when the subs hit hard and see if anything even for a second dips below 12V...To DDM the ohms of the sub remove the wires from the amps speaker terminalsput your DMM on the resistive setting (or OHM setting) and it should punch out a number...remember impedance varies from sub to sub so you may get a 1.75 and that is almost certainly 2 ohm impedance....Also another way you can trouble shoot this to assure it's not a busted ampremove the speaker wires then pump up the volume if it goes into CUR then time for a new amp...
March 14, 200718 yr Author Excessive current means the speakers is asking for something the amp can't provide... So the amp clips and goes into protect to protect the sub (it's a no no to send a sub a clipped signal)...DMM the amps voltage when the subs hit hard and see if anything even for a second dips below 12V...To DDM the ohms of the sub remove the wires from the amps speaker terminalsput your DMM on the resistive setting (or OHM setting) and it should punch out a number...remember impedance varies from sub to sub so you may get a 1.75 and that is almost certainly 2 ohm impedance....Also another way you can trouble shoot this to assure it's not a busted ampremove the speaker wires then pump up the volume if it goes into CUR then time for a new amp...Ahh I see now, So I will have to back the Gains off or check my settings again.I have a DMM built into the amps and is very accurate(Never realized it untill i plugged in a DMM to test) and it neevr ever dips below 12 Except when the car is off and the system has been playing for a while..Lastly, how would that test Impedence for the sub setup? If the subs arent hooked up? Ya know what im saying
March 14, 200718 yr With the amp off, turn the meter to Ohms...dual 1ohm coils in series should leave you with a 1.4ohm dcr.
March 14, 200718 yr The DMM probes go to the subs speaker wires coming from the amps speaker terminalsSo the black (negative probe) of the DMM goes to the negative wire/terminal of the subs and the red (positive probe) goes tot he positive speaker wire...And nick corrected my dcr value it's 1.4 not 1.7 (so many numbers rattling around my head)...remember it is always best to get the highest signal from the source of the system the HU...So make sure you did your 3/4 volume turn on the HU then adjust the system to that.When you use the HU as your source of main voltage the lower you can set your gains which makes for a cleaner and less stress free system and everyone plays nicely together... Edited March 14, 200718 yr by theabunai
March 14, 200718 yr also try your setup without any bass boost and the sub setting on your head unit at 0. this gives your amp the cleanest signal possible. if you let the head unit distort the signal, the amp is just gonna amplify the distorted signal and clip the hell out of it. bass boost and stuff like that makes it sound louder to the ear, but all it is really doing is introducing distortion.
