Subwoofer THUD

[wickedsicilian 10+ year member]

Whenever i lower my volume (usually with a change of 3-4 decibels) i get a big THUD coming from the subwoofer as if i have a short somewhere.

It doesnt happen all the time and the volume doesnt even have to be loud to get the THUD even though the thud itself is quite loud.

Any suggestions?

P.s My rcas are brand new, could it be something to do with the ground?

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[lostdaytomorrow 10+ year member]

Check the ground and the gain. Gain might be too high.

 

[fwb_1234 10+ year member]

Are you sure that its when you change your volume and not bumps in the road?

Just checking, cause something similar is going on in my car.

 

[dragnix 5,000+ posts]

def. check the ground. Could be a problem with the HU's ground also

 

[ultimate157 5,000+ posts]

sounds like a loose connection somewhere.

 

[wickedsicilian 10+ year member]

100% positive its when i adjust the volume, cause if the cars parked and not moving it makes that sound.

ill give the ground from the HU a try. Might rewire the whole system. thanks anyway

 

[savagebee 10+ year member]

100% positive its when i adjust the volume, cause if the cars parked and not moving it makes that sound.
ill give the ground from the HU a try. Might rewire the whole system. thanks anyway

does this problem occur if the car is not running?

 

[Fear Of Theive 10+ year member]

If its a popping noise.almost like a heavy door being shut hard i guess. Then its a ground issue. That or ur pulling to much off ur battery. my friend had the same problem with his 3 12's in his camry. When the air was on or he put his window's down he'd sound like a pulsing helicopter. Tommorow when you leave just leave the system off for the trip..give ur battery time to get full power.

 

[Fear Of Theive 10+ year member]

Forgot 1 thing,If its a pioneer head unit you need to Ground ur rca's I think that fixed it.

 

[ultimate157 5,000+ posts]

Do you have a remote? Try changing the volume without touching the HU.

 

[wickedsicilian 10+ year member]

Havnt tried it with the car not running but i do know that it does happen even when i use the remote.

The HU is a clarion DXZ576USB and im running 2 12inch pioneers with the clarion dpx1800 monoblock.

I did forget to mention im running the amp off of 8 guage cable instead of its recommended 4 guage as stated in the manual(both positive and negative).lol

Looked up the car manual, the altenator pumps out 90 amps.

And all it sounds like is a big THUD, as if i hit a REALLY HEAVY and QUICK bass note even with the volume down.

It doesnt happen all the time, its just really random, sometimes it happens after i havnt changed the volume for a while, while at other times i could be playing music for 5 minutes, go to change the volume and it goes THUD.

 

[ultimate157 5,000+ posts]

upgrade your wires to 4 awg.

 

[wickedsicilian 10+ year member]

If i add another 300w RMS 2 channel amp will 4 guage be big enough?

 

[wickedsicilian 10+ year member]

sorry to drag this on any longer but when i had the same setup running both the clarion amp and the 300rms dual channel off of 8 guage before, with a sony headunit, it NEVER made the thud.