Why would my AMP make these noises?

Discussion in 'AV Receivers' started by Tim L, Apr 10, 2005.

  1. Tim L

    Tim L Second Unit

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    I am currently using a B&K Ref.%0 with B&K 200.7 amp-tonight while watching a movie I noticed static like noises coming from the left surround and left front speakers- during the whole movie- when I power the AMP off it emits a high pitch whine that slowly gets quite then a POP comes form the speakers- when i Power it back up it emits the high pitch whine (like a takeoff) in reverese -getting louder. I have it hooked up to a Monster 5100 line conditioner. It was fine yesterday now this-honestly I'm afraid to turn the damn thing back on- Idon't know if it will damage my speakers. Does anyonehave any input to what it may be? Any help will be much appreciated, thanks
    Tim
     
  2. TimRP

    TimRP Stunt Coordinator

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    Sounds like a amp problem, but to make sure do the following:

    Disconnect the pre-amp from the amp, and just power on the amp, does it still do this?

    Is the amp still under warranty?
     
  3. Jason Bell

    Jason Bell Stunt Coordinator

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    I would call B&K Tech support. They are very easy to reach and helpful.

    I'm not using the same amp as you but I have a B&K ST2140 powering my mains. When I turn it on there is a slight whooomp sound. When I turn it off there are three or four gentle whoop whooop from my speakers bass drivers. Definitely nothing like your describing.

    I wouldnt use the amp until you talk to somebody at B&K no point risking damage to your speakers.

    I hope you get it worked out.
     
  4. Tim L

    Tim L Second Unit

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    Well it hasn't done it since- go figure- I think it may have had something to do with when my electrician came and cut power for a while- I just reset the Monster conditioner and its been fine- some dirty signals got in there somehow- this hobby make me mental sometimes. I will keep an eye on it- but hopefully it will be alright- besides I couldn;t really find any info on the web and such that resembled my problem.
    Tim
     
  5. Jose G

    Jose G Supporting Actor

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    Jason,

    Have you contacted B&K about the whoop whooop issue? I was over at someones home who had a B&K set up (I don't remember the model numbers) and don't remember hearing this. It's something I'm sure I could have missed, but this guy never mentioned it, and I'm just curious if it's something that B&K amps just do.
     
  6. Tim L

    Tim L Second Unit

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    yes I did contact B&K they just said they would take it in and look at it no problem- but now I'm not sure its necessary. The only noises that B&K amps make (i think its actually the preamp) is a slight click when switching between modes etc. because there is no muting circuit built in the preamp (ref.50). That is no big deal to me-what I heard was something altogether different- but I am unable to get it to repeat- which is a good thing. I am haviing electrical work done in the house (lights, alarms etc). so who knows-it never did it before the work started. As for the B&K set up the sound is awesome- no complaints- movies and music really shine and come alive.
     

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