Bass still playing

[Mr FaceCaser]

Ok so my subs are still playing a very low level even when the volume is at zero any reason for that?

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[1aespinoza 10+ year member]

Ok so my subs are still playing a very low level even when the volume is at zero any reason for that?

Try pulling back on the gain.

 

[Mr FaceCaser]

Try pulling back on the gain.

Tried this and still has a very low rumble when the volume is set at zero. Also when music plays with bass rumble disappears until I pause music or turn it all the way down

 

[1aespinoza 10+ year member]

Tried this and still has a very low rumble when the volume is set at zero. Also when music plays with bass rumble disappears until I pause music or turn it all the way down

Disconnect the RCAs then turn it back on.

 

[Mr FaceCaser]

Disconnect the RCAs then turn it back on.

Running into another problem so bass was playing fun then all sudden got really bad smelt something that smell like a blown sub but go check the subs and when I push them in they push in just fine. But now rca unplugged from amp and head unit something is still playing just like if a TV went to the black and white thing. I have no idea what this could be. Also turned gain all the way down on the amp and still does that. Idk wtf is happening

 

[Deiimos]

If an amplifier goes bad it can sometimes send a high DC voltage to the subs which will fry the coil, even if the amp is smaller than what would normally blow them. If you don’t catch it in time and shut it off and unhook it. And I have had voice coils fry but the cone still moved okay, so that is not always the definitive test. The DMM test is the way to go. It does sound like there could be an issue with the amp as well. Hopefully the subs survived.

A bad smell is never a good sign with electronics.

 

[Mr FaceCaser]

If an amplifier goes bad it can sometimes send a high DC voltage to the subs which will fry the coil, even if the amp is smaller than what would normally blow them. If you don’t catch it in time and shut it off and unhook it. And I have had voice coils fry but the cone still moved okay, so that is not always the definitive test. The DMM test is the way to go. It does sound like there could be an issue with the amp as well. Hopefully the subs survived.

A bad smell is never a good sign with electronics.

Im hoping if its the amp thats so much better if its the sub I think ill be done with car audio

 

[Mr FaceCaser]

If an amplifier goes bad it can sometimes send a high DC voltage to the subs which will fry the coil, even if the amp is smaller than what would normally blow them. If you don’t catch it in time and shut it off and unhook it. And I have had voice coils fry but the cone still moved okay, so that is not always the definitive test. The DMM test is the way to go. It does sound like there could be an issue with the amp as well. Hopefully the subs survived.

A bad smell is never a good sign with electronics.

The subs were super hot to the touch so not a good sign

 

[1aespinoza 10+ year member]

But now rca unplugged from amp and head unit something is still playing just like if a TV went to the black and white thing. I have no idea what this could be.

So you are getting white noise out of the un-signaled sub amp? From what I have observed, you can clip an output by amplifying a low signal. In other words, turning gain higher with too low of a signal. And clipping causes voicecoil odor.
What amp is it?

 

[Mr FaceCaser]

So you are getting white noise out of the un-signaled sub amp? From what I have observed, you can clip an output by amplifying a low signal. In other words, turning gain higher with too low of a signal. And clipping causes voicecoil odor.
What amp is it?

Sundown Sia 3500

 

[1aespinoza 10+ year member]

Sundown Sia 3500

Oh, it is a full bridge amp. I do not know if that particular model is sensitive to voltage input but how steady is your power supply?

 

[Mr FaceCaser]

Oh, it is a full bridge amp. I do not know if that particular model is sensitive to voltage input but how steady is your power supply?

Very have the big 3 up front. And have a 400 amp alternator with a starter battery and back battery

 

[1aespinoza 10+ year member]

Very have the big 3 up front. And have a 400 amp alternator with a starter battery and back battery

Good to go in that area then. As suggested, do a visual of the voicecoils. I have old subs that have gotten smelly when played hard without any issues, so it does not necessarily mean they are cooked.

 

[Mr FaceCaser]

Good to go in that area then. As suggested, do a visual of the voicecoils. I have old subs that have gotten smelly when played hard without any issues, so it does not necessarily mean they are cooked.

Appreciate it giving me hope

 

[Mr FaceCaser]

Good to go in that area then. As suggested, do a visual of the voicecoils. I have old subs that have gotten smelly when played hard without any issues, so it does not necessarily mean they are cooked.

So i measured the impedance from the box and I have it wired to 1 ohm and its reading 1.1? Do I still need to take my subs out of the box if the terminals on the box are reading 1.1?

 

[Mr FaceCaser]

Good to go in that area then. As suggested, do a visual of the voicecoils. I have old subs that have gotten smelly when played hard without any issues, so it does not necessarily mean they are cooked.

Also could it be the rca wires? Because I got a new set for the bass knob for the input and then using the old set for the output? Could it but my rca cables are bad?

 

[1aespinoza 10+ year member]

Also could it be the rca wires? Because I got a new set for the bass knob for the input and then using the old set for the output? Could it but my rca cables are bad?

Earlier you said the amp still made white noise without the RCAs, so I do not think they are the issue. Did you make a change right before the issues appeared?

 

[Mr FaceCaser]

Earlier you said the amp still made white noise without the RCAs, so I do not think they are the issue. Did you make a change right before the issues appeared?

Everything was working fine until I hooked up a rca bass knob. But I gotta look at my ground and Everything. How would I tell if the amp is bad

 

[1aespinoza 10+ year member]

Everything was working fine until I hooked up a rca bass knob. But I gotta look at my ground and Everything. How would I tell if the amp is bad

I have used RCA bass knobs for years without issues so I doubt it would be the culprit. Try using the amp without the bass knob.
Only way for us non-techs to verify amp integrity is by using it without any other component or opening it for a visual inspection.

 

[Mr FaceCaser]

I have used RCA bass knobs for years without issues so I doubt it would be the culprit. Try using the amp without the bass knob.
Only way for us non-techs to verify amp integrity is by using it without any other component or opening it for a visual inspection.

Had the bass knob and it still did. So your right not the rca bass knob. Now when I checked my ground it was super loose and I was able to pull the cable out of the terminal. So ill replace that and see. Im also going to use new speaker wire.