I did research on what the cause of the thumping sound coming from the sub, and all I saw was that check my ground wire but that's fine.
When I turn my car on my sub makes a heartbeat or thump sound. The amp (kenwood) light blinks when it thumps. Any idea what the problem is? I have a kicker sub and I checked the indash but there was no loose wire and also checked amp fuse, so any ideas?

 

It's only when you first power-up, right? Every remote amp I've had did the same thing on start-up. Is it different from before?

 

It stays on when I turn the car on. It's never did it before, and also the sub doesn't bump of course when music is on.

Anyways update I looked at my sub when I turn it on and I saw little smoke coming out from it. So I took the sub apart and it's smoking a little so that's probably the cause. So you think I need new subs or can fix it?

 

Just replace it. Kicker stuff can be had for cheap.

 

So, dumb q's-
1) correct wire gauge,yes? High out and small wire=high resistance, heat.
2) impedance from amp matches rating on sub?

 

Yes I had both subs and amp, wires for over 4yrs

 

Generally people are asking about a thump on turn off.

What model kicker? How many subs? What model amp?

Smoking means the coil got hot. Doesn't mean anything is broken though.

What are your gains set to? Don't give me physical settings, I want voltages.

 

Kenwood model Kac8103d
Kicker sub 07cvt124
I have one sub and all the places I call don't fix them.

 

kachina is not a kenwood model number....

 

Sry stupid phone corrected it but I edit it

 

Also kenwood is 1000 watt amp and the sub is 4ohms

 

The Kenwood is actually 300W at 14.4V, so anything lower than that and you have even less power.

That sub is rated 400W.

My guess is the bass boost and gains are cranked way up to get output from it and you've mostly cooked the sub. I've seen it many times.

The Z is also wonderful at masking distortion from the sub.

 

So what is the gain set at?

 

The amp is 1000 watt I looked it up and I need to check what it's set at

 

It's not up to high

 

Uh, according to Kenwood it's a 300W amp.

http://my.kenwood.com/Car_Entertainm...iers/KAC-8103D

Rated Power Output [14.4V]
• 300W x 1 at 4ohms [20-200kHz 0.5% THD]

 

http://

 

Max power is 1000 watt

 

So another words need another sub?

 

That picture doesn't tell me anything. I don't know where the **** is when it's rotated all the way counter clockwise and I don't know the line voltage on your preout.

Physical position of the **** means nothing. Output voltage tells you where to set it.

Also, max power means nothing to anybody. RMS is the only thing to look at.