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Speaker hiss from sub

My REL subs are causing my speakers to have a hiss, which I can hear when the system is off, but the subs idling. It goes away if I run an extension cord into my power conditioner (PS Audio PowerPlant). The subs are connected directly to my amps. Any ideas on solutions without buying multiple conditioners? I tried a simple plug in Isotek wall wart that is supposed to remove noise—no dice. Also tried a better power cord no improvement. Tried moving the sub interconnect around no change. Only way this his goes away is with the power conditioner.

 

Any ideas on a solution?

w123ale
erik_squires
16,130 posts
 

Does the hiss continue when you unplug the subs, leaving only the AC cord connected?

w123ale OP
108 posts
 

Hiss goes away when I unplug the power for the subs but have them connected to the amps. It also goes away if the subs are powered but they are unplugged from the amp.

erik_squires
16,130 posts
 

I'm trying to understand something.  Is the hiss coming from the main speakers or the subs?

w123ale OP
108 posts
 

From the main speakers 

missioncoonery
1,223 posts
 

Not sure if this applies to you but I've had problems with my Rel subs..Rel replace one  of them about 6 months in and now the replacement is doing the same thing..I called a Rel dealer and was told they were having lots of complaints and several returns.. Rel is having build issues from whst I'm told...

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