I get just a humming sound out of the 18" B-52 sub with my Crown CE-2000, there are no fault lighs

https://billfitzmaurice.info/forum/viewtopic.php?t=5935
maybe this link will help you.
hope so.
have a good day

Change control board

It sounds like your output transistors are bad or power supply problems. You will need to have it serviced unless you know about electronics and how to repair them. Do not attempt this yourself unless you know what you are doing. It could be fatal.

Depending on the configuration of speakers you have it will deliver different amounts of power up to 1950 watts when used to power a single 4 ohm speaker. Typical usage would be powering a pair of 8 ohm speakers, in which case it will deliver 400 watts per channel/ speaker.

The symptom sounds like an open signal shield somewhere and the cable is acting like an antenna for airborne electrical noise.

Disconnect the RCA cable at the sub. Is it still humming? NO? Problem is external to it. YES? Internal. Broken ground somewhere.

Recheck all connections making sure to twist the RCA head as you install it so oxides will be worn off.

Consider what may have changed in the environment regarding electrical devices, motors, magnetic sources. Ensure signal and speaker wires as ar not running are as non-parallel to any power cords as practicable.

It works on demand.

Register and download the manual for free at retrevo.com
http://www.retrevo.com/support/Crown-CE-2000-Amps-manual/id/22150ag314/t/2/

It IS set to protect itself and your speakers from over-exuberance.

Have you considered the input and the speakers?

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Crown-CE-2000-Amps-manual/id/22150ag314/t/2/

See page 21

There was never anything mentioned about the 18 yamaha sub in the hook up process

There is a fan drive circuit in these that will control the fan speed depending upon the load on the amp. It sounds like this citcuit is defective, This unit should be sent in for service. Crown units are not the easiest to repair and I would not suggest it be attempted without prior experience. This should not be an expensive repair.

Dan

Do you get any Fault indications?

Have you swapped the speakers around to eliminate them as external causes?

When the channel dies is the unit very hot and is the fan turning very fast (it should be if hot)? The fan could be defective, slow or airflow may be restricted.

Turn the amp off and examine the fan guard on the rear to make sure it is clear of dust and debris. Vacuum it out if necessary. With a small thin non-metalic object reach in and test the fan for free movement by trying to rotate it. It should coast.