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Speaker hum from Aquarium flourescents.

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Posted on June 9, 2012 at 15:09:26
jerrygp
Audiophile

Posts: 2
Location: Washington
Joined: June 9, 2012

I have significant speaker hum when switching sources on my Onkyo TX-NR709 receiver to the TV/CD analog inputs that I am using as inputs for my Rega RP1 turntable which is routed through a Musical Fidelity V-LPSII preamp powered by MF's V-PSUII power supply. The higher end AudioQuest RCA output cables from the preamp are connected to the TV/CD analog inputs on the receiver. There is a 55 gallon aquarium next to the component stand that houses my turntable which in turn sits next to the cabinet that houses the rest of my components...all within a span of about 12 feet in width. The aquarium lights are on a separate power circuit than my Panamax 5100 power conditioner, from which all components are powered. There is an AudioPrism Quietline noise filter plugged in next to the Panamax power conditioner plug at the wall outlet. When I turn the lights off, the hum stops. There are two flourescent fixtures with ballasts in the aquarium lid. Does anyone know of a solution to this problem? Would a flourescent fixture that does not require a ballast solve the problem?

Thanks for any help.
jerrygp1 Posts: 2Joined: Fri Jan 27, 2012 1:13 am


Jerry P.

 

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RE: Speaker hum from Aquarium flourescents., posted on June 10, 2012 at 10:19:56
jerrygp
Audiophile

Posts: 2
Location: Washington
Joined: June 9, 2012
Post update...I removed the old flourescent fixture and replaced it with two standard light sockets and 10W micro mini CFL bulbs by Sylvania. No more hum. The ballasts in the flourescent fixtures create a pretty strong 60Hz magnetic oscillation that was either affecting my speaker drivers or my cabling, thus producing the hum.
Jerry P.

 

RE: Speaker hum from Aquarium flourescents., posted on June 11, 2012 at 12:23:45
6bq5
Audiophile

Posts: 3725
Location: SF Bay
Joined: August 16, 2001
Fluorescent lamps - unless powered by DC - are very noisy beasts and generally throw quite a bit of noise in may ways,
Glad you solved it,
Happy listening
Happy Listening

 

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