Whining Noise

[rollo]

   Really ??? went into audio room this morning. Amps were on, BSG QOL on, DAC on, Transport on, preamp off.
    I;m hearing a whining noise in both channels for the first time. WTF ??? Never had this noise until this morning.
 Yes I spelled whining wrong on subject. Richidoo please fix that.


charles


Edit (richidoo:) Ay-aye capitan! 

[richidoo]

Tube preamp off while the amps are on seems naughty to me...    I've seen several speakers blown up over the years doing that. Small static charge on the preamp's output caps, etc.

Tube inputs on the class D amps, right? Are those tube inputs stable with no input connected?

Next time it happens try turning on the preamp and see what happens. But if it pops and blows up your speakers it's not my fault.     

[P.I.]

I hate whiners, be they people, gears audio components or me.

If it persists after everything is powered down for at least 20 minutes and then powered up again, ya' gotta do the eliminate one component at a time gig until you find the culprit.

Sometimes that kind of noise can be a byproducts of RFI/EMI that is transitory in nature due to some weirdness on the grid.  I experienced the same kind of things many years ago when my neighbor plugged in a power generator to test running his home and did not disconnect it from the local grid.  That was one weird noise.

[rollo]

  It just went away all by itself after I yelled at it. Richidoo the Arions have a switch to turn off the input and keep power supply on. That it is designed and used.
   These amps are hard to blow up by accident I shorted the speaker outputs and not one issue.


charles
   
   

[P.I.]

I love it when I magically fixes itself!

Digital be weird people!?,!