Since you have said the speakers make this sound when "turned on", I'm going to assume there's some form of power amplifier attached (internal, external or otherwise). Based on the minimal information provided here, this simply sounds like the normal reaction of a speaker when the amplifier is turned on. In short, an audio speaker is a type of "transducer" and when power is applied (thru some form of amplifier), the cone reacts to the power surge and causes a thump, pop or other noise. Turn on your TV for example and you'll usually hear a small pop from the speakers...and a larger/more powerful amplifier is likely to make a louder noise. Without further information, in most cases this is quite normal.
Assuming there is an external power amplifier, my advice would be to turn the volume on the amp (regardless of whether there's a receiver connected) to 0 before turning the power on. If it still makes such a noise, it's possible the volume control of the amp may require cleaning.
Good Luck!
SOURCE: makes thumping noise without input from receiver
So no wires plugged into it at all? Sounds like a cold solder joint on a board or a bad connection inside the amplifier.
SOURCE: My subwoofer is making a regular thumping noise
if you can replace the subwoofer, do it! Unless, your whole sound system is based on it. problem inside of subwoofer's internal amp. It's an active subwoofer, must be replaced with same kind. otherwise, take unit to local repair shop for diagnostics and repair. it might be some capacitors gone bad, may be IC chip is at fault. anyway, not do it yourself, unless you're an electronics expert.
good luck,
Alex's Tv Service,
215-806-5980.
There
are many possibilities that can cause car to make noise.
It's
actually from where the noise is coming from. Front end or rear end. From
engine area or from inside the steering or from brakes.
There
is N-number of possibilities for the car to make grinding noise or any other
kind of noise.
---------
For
step by step troubleshooting this problem, I suggest you to refer the help
links mentioned below. Its a complete solution with proper explanation to
identify the cause of problem: ------
Click
the link below: -----
ABS light comes on and Car makes Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
------------------
Car makes clicking noise?
http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html
--------------
Car makes whining noise like
driving on rough pavement?
http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html
------------
Chirping Noise From Car?
http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html
----------------
What are the possibilities for
Clicking noise in car?
http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html
--------------
Squealing at start up on car?
http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html
--------------
Chirping sound coming from engine?
http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
-----------
Vehicle making Clunk Thump Thud
noise?
http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html
------------
4X4 Truck makes roaring noise in
the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
--------------
Heater makes clicking noise under
dash on Ford Explorer?
http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html
---------------
Clicking noise under dash and
front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
------------------
Car Brakes Making Noise?
http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html
---------------
Car Alternator making noise?
http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html
-----------------
Car Alternator Bearing Makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2011/12/car-alternator-bearing-makes-grinding.html
----------------
Engine makes noise and Cooling Fan
belt Breaks?
http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
--------------
Vehicle Makes Clicking Sound While
Taking turns?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-makes-clicking-sound-while.html
-------------
These will help.
Thanks.
There
are many possibilities that can cause car to make noise.
It's
actually from where the noise is coming from. Front end or rear end. From
engine area or from inside the steering or from brakes.
There
is N-number of possibilities for the car to make whining noise or any other kind
of noise.
---------
For
step by step troubleshooting this problem, I suggest you to refer the help
links mentioned below. Its a complete solution with proper explanation to
identify the cause of problem: ------
Click
the link below: -----
Car makes clicking noise?
http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html
--------------
Car makes whining noise like
driving on rough pavement?
http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html
------------
Chirping Noise From Car?
http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html
----------------
What are the possibilities for
Clicking noise in car?
http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html
--------------
Squealing at start up on car?
http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html
--------------
Chirping sound coming from engine?
http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
-----------
Vehicle making Clunk Thump Thud
noise?
http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html
------------
4X4 Truck makes roaring noise in
the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
--------------
Heater makes clicking noise under
dash on Ford Explorer?
http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html
---------------
Clicking noise under dash and
front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
------------------
Car Brakes Making Noise?
http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html
---------------
Car Alternator making noise?
http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html
-----------------
Car Alternator Bearing Makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2011/12/car-alternator-bearing-makes-grinding.html
----------------
Engine makes noise and Cooling Fan
belt Breaks?
http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
--------------
Vehicle Makes Clicking Sound While
Taking turns?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-makes-clicking-sound-while.html
-------------
ABS light comes on and Car makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
-----------
These will help.
Thanks.
There
are many possibilities that can cause car to make noise.
It's
actually from where the noise is coming from. Front end or rear end. From
engine area or from inside the steering or from brakes.
There
is N-number of possibilities for the car to make wierd noise or any other
kind of noise.
---------
For
step by step troubleshooting this problem, I suggest you to refer the help
links mentioned below. Its a complete solution with proper explanation to
identify the cause of problem: ------
Click
the link below: -----
Car makes clicking noise?
http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html
--------------
Car makes whining noise like
driving on rough pavement?
http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html
------------
Chirping Noise From Car?
http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html
----------------
What are the possibilities for
Clicking noise in car?
http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html
--------------
Squealing at start up on car?
http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html
--------------
Chirping sound coming from engine?
http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
-----------
Vehicle making Clunk Thump Thud
noise?
http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html
------------
4X4 Truck makes roaring noise in
the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
--------------
Heater makes clicking noise under
dash on Ford Explorer?
http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html
---------------
Clicking noise under dash and
front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
------------------
Car Brakes Making Noise?
http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html
---------------
Car Alternator making noise?
http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html
-----------------
Car Alternator Bearing Makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2011/12/car-alternator-bearing-makes-grinding.html
----------------
Engine makes noise and Cooling Fan
belt Breaks?
http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
--------------
Vehicle Makes Clicking Sound While
Taking turns?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-makes-clicking-sound-while.html
-------------
ABS light comes on and Car makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
-----------
These will help.
Thanks.
There
are many possibilities that can cause car to make noise.
There
is N-number of possibilities for the car to make thud noise or any other
kind of noise.
---------
For
step by step troubleshooting this problem, I suggest you to refer the help
links mentioned below. Its a complete solution with proper explanation to
identify the cause of problem: ------
Click
the link below: -----
Vehicle making Clunk Thump Thud noise?
http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html
------------
Car makes clicking noise?
http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html
--------------
Car makes whining noise like
driving on rough pavement?
http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html
------------
Chirping Noise From Car?
http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html
----------------
What are the possibilities for
Clicking noise in car?
http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html
--------------
Squealing at start up on car?
http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html
--------------
Chirping sound coming from engine?
http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
-----------
4X4 Truck makes roaring noise in
the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
--------------
Heater makes clicking noise under
dash on Ford Explorer?
http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html
---------------
Clicking noise under dash and
front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
------------------
Car Brakes Making Noise?
http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html
---------------
Car Alternator making noise?
http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html
-----------------
Car Alternator Bearing Makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2011/12/car-alternator-bearing-makes-grinding.html
----------------
Engine makes noise and Cooling Fan
belt Breaks?
http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
--------------
Vehicle Makes Clicking Sound While
Taking turns?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-makes-clicking-sound-while.html
-------------
ABS light comes on and Car makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
-----------
These will help.
Thanks.
Car makes clicking noise?
http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html
--------------
Car makes whining noise like driving on rough pavement?
http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html
------------
Chirping Noise From Car?
http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html
----------------
What are the possibilities for Clicking noise in car?
http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html
--------------
Squealing at start up on car?
http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html
--------------
Chirping sound coming from engine?
http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
-----------
Vehicle making Clunk Thump Thud noise?
http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html
------------
4X4 Truck makes roaring noise in the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
--------------
Heater makes clicking noise under dash on Ford Explorer?
http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html
---------------
Clicking noise under dash and front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
------------------
Car Brakes Making Noise?
http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html
---------------
Car Alternator making noise?
http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html
-----------------
Car Alternator Bearing Makes Grinding noise?
http://repairhelpcenter.blogspot.com/2011/12/car-alternator-bearing-makes-grinding.html
----------------
Engine makes noise and Cooling Fan belt Breaks?
http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
--------------
Vehicle Makes Clicking Sound While Taking turns?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-makes-clicking-sound-while.html
-------------
ABS light comes on and Car makes Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
-----------
These will help.
Thanks.
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