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amp+ standby noise

Kurt Clemens

February 07, 2016 13:21

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Dear,

In my livingroom I have at the moment a RB pi 2 with an external class D amplifier.
Real shortcommings are noise when no sounds plays and setting the amplifier to a certain max volume by hand. With the Logitech Media Server I can play with the sound output, but if I wanna play a certain song really loud I have to go to the amplifier and turn the knob..

My question is the following:

I want to buy a 2nd RB pi 2 including the hifiberry amp+. Can somebody give his/her experience with this combination regarding noise when no sound is played? I totally do not wanna hear any noise when no sound is played.

Since I am gonna build a multi room setup, also my door bell will go thru the same sound system. Herefore, the system will always stay in standby. Or is there any workaround for this function? like only putting the amp+ off en quickly turn on by command?

So, what I want is a non-noisy system on standby (amp+ on/off needed?) and only 1 volume setting (software). Is the combination RB pi 2 + amp+ the right combination for me?

I will use the Logitech Media Server, since I use the system now almost 1 year, and it is real stable.

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4 comments

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  HiFiBerry team February 07, 2016 13:32

  There is never "no noise" in any analog circuit (and class-D is also analog). The question is more if the residual noise is more if in your setup you can hear any noise. That depends a lot on your environment, hearing and speakers. If you do not need high output volume, I would recommend low-efficiency speakers. However, I guess you have to test it by yourself.

  Best regards,
  Daniel

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  Kurt Clemens February 07, 2016 13:38

  Daniel, thanks for your input.

  Since the amp+ will power the output. I think the only correct way to get rid of possible noise is to power off the amp+ if not in use, correct? If so, is this easy to do command?

• 0
  
  HiFiBerry team February 07, 2016 13:41

  Hi,

  you can't power off the power stage of the Amp. However, I know about many installation whee this isn't a problem. Check out this one:
  https://support.hifiberry.com/hc/en-us/articles/205699981-How-to-build-a-multiroom-audio-system-based-on-Raspberry-Pi-and-Hifiberry

  Best regards,
  Daniel

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  Kurt Clemens February 07, 2016 13:50

  Thanks for the link. Have found it earlier, but only in French, so this English version can come in handy :)