popping noise from audiobahn sub

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Rfkicker1

Member - Posts: 7

Joined: March 08, 2002

Location: United States

Posted: November 30, 2003 at 1:04 PM / IP Logged

Im testing an audiobahn subwoofer in my house. well its wired in parrallel so its running at 2 ohm mono. well I have it wired to a rockford fosgate bd1000 amp, which has plenty of power to run it actually enough to blow it if I wanted to lol. anyways when I was testing the sub i would turn it up and it would start making a popping sound. well when i turned it up it wasnt running that much power so i wasnt overpowering it. ive put the sub in a differnet box and everything but it keeps making the noise and im not for sure whats causing it. any suggestions on what could be doing this?

forbidden

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: November 30, 2003 at 4:48 PM / IP Logged

Your gain on the amp is too high, what you are doing is running the amp out of clean power and causing a loss of control of the motion of the driver. The popping could in fact be the subs voice coil former making contact with the back of the pole plate. You are running the Rockford amp in the house? What are you useing for a power supply? If you are using a small little power supply or a battery, the voltage and current to run that amp properly are probably not there, bad things happen to speakers (like popping) when you try and do things like this. What are you using to "turn it up" the gain on the amp or a car cd player or a home reciever..... Need more info

PS: power doesn't blow a sub, heat does.

Top Secret, I can tell you but then my wife will kill me.

Rfkicker1

Member - Posts: 7

Joined: March 08, 2002

Location: United States

Posted: November 30, 2003 at 8:32 PM / IP Logged

I appreciate the info but I know about that. I know there are people that know more than me about this but I am not a newbie however I am open to learning new things. Anyways im running it off of a trolling battery. its enough power to do what im doing. and its all car audio equipment. Sony receiver, stinger installation kits, running 8 gauge wire for power and ground on the fosgate amp. I would think the sub is blown however the way it still hits leads me to believe otherwise. I am going to try and find someone that has some other subs where i can test the amp on them and see how it reacts however i think the amp is fine. The receiver i have is an old one but it works. I had to replace a capacitor in it but i replaced it with the same farad and voltage rating required. When using the gain i turn it usually about halfway sometimes less and i turn it up on the car receiver with a cd. The only reason i dont have it wired in a car is my car right now is fubar to put it bluntly lol.

Alpine Guy

Platinum - Posts: 2,478

Joined: October 18, 2003

Location: Canada

Posted: November 30, 2003 at 11:02 PM / IP Logged

sounds like it is "partially blown" the sub will still work fine, just it will make popping noises.

nedgeworth

Silver - Posts: 264

Joined: November 03, 2002

Location: Australia

Posted: November 30, 2003 at 11:15 PM / IP Logged

Other thing you can look at is enclosure size as well. What sort of box are you using and what size?

hightower

Member - Posts: 18

Joined: October 24, 2003

Location: United States

Posted: December 01, 2003 at 10:49 AM / IP Logged

maybe you should run 4 gauge wire instead of 8 for an amp that size

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: December 01, 2003 at 12:05 PM / IP Logged

Dose it only happen at high volumes? It sounds to me like the sub may be bottoming out. I would also suggest a 4 gauge for your amp.

Rfkicker1

Member - Posts: 7

Joined: March 08, 2002

Location: United States

Posted: December 01, 2003 at 12:21 PM / IP Logged

It does the popping at low levels but u can barely tell. also ive tried 2 differnet boxes one was 1.5 cbft the other 2.5cbft. both are sealed. and ill try bigger wire dont know if it will work but i will give it a try.

bberman1

Gold - Posts: 2,314

Joined: March 11, 2002

Location: United States

Posted: December 01, 2003 at 12:27 PM / IP Logged

The larger cable will not stop the popping, but it is the correct size for your amp. As far as the sub goes if you push on the cone do you feel any rough spots? Dose the sub rattle at all? Also how do you have it wired? And what are your gains set at?

forbidden

Platinum - Posts: 5,352

Joined: November 01, 2003

Location: Alberta, Canada

Posted: December 01, 2003 at 12:49 PM / IP Logged

Once a sub has been damaged it is a downward spiral for it, eventually you will need a new sub. If the main "popping" sound is coming at volume levels above normal, I would be having a good look at that battery, while it may have 14.4 volts, it may be down quite substantially on current, this will make the amp to some pretty crazy things to the signal. I would also bypass that Sony receiver for now, try a car cd player and see if the noise can be duplicated. The home receiver may have a dirty signal being amplifier which you hear as a "pop", the amp probably has a fairly low output voltage. Imagine if you will a flashlight, when you first put the batteries in it is nice and bright, but one day when you need it the most, the light barely comes to life, time for new batteries, how are you charging that trolling battery?

Top Secret, I can tell you but then my wife will kill me.

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