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Save to drive only one channel?

hsmeets

February 21, 2015 09:07

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Hi,

Is it save for the Amp to have no load connected to one channel? or better connect a dummy load.

Background: to build a small active speaker, mono to start with, to act as a tabletop speaker, running picoreplayer.

Thanks,

Huib

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10 comments

• 0
  
  HiFiBerry team February 21, 2015 10:41

  You can do this without a load. This is no problem for the Amp.
  
  Best regards
  Daniel
• 0
  
  Adam McCartney February 21, 2015 21:45

  What about bridging the outputs to one speaker? i have a mono Speaker setup but i cant get squeezelite and alsa to downmix to mono out put? so far my only solution was to connect both outputs to one speaker. It works but before i go and put this in to fulltime use i wanted to check if its going to cause issues and blow up amp+ or speaker.
• 0
  
  hsmeets February 21, 2015 22:49

  Something like this did not work to downmix to mono?
  
  
  pcm.!default makemono
  
  pcm.makemono {
  type route
  slave.pcm "hw:0"
  ttable {
  0.0 1 # in-channel 0, out-channel 0, 100% volume
  1.0 1 # in-channel 1, out-channel 0, 100% volume
  }
  }
• 0
  
  Adam McCartney February 22, 2015 11:55

  I did try that and many other configurations i found but i failed to get mono only. i had the configuration working with voolumio and MPD but i think it was MPD thatforced the mono downmix and not Alsa.
  
  i've got another one to build so i'll keep trying.
• 0
  
  hsmeets February 22, 2015 12:16

  So setting Squeezelite to use pseudo device 'makemono' and having the DigiAmp as slave device did not work?
• 0
  
  Adam McCartney February 22, 2015 12:17

  nope.
  
  although i did alot of the software configuration late at night, i'll have another stab when i get my other speaker wired up and my brain is fresh.
• 0
  
  hsmeets February 22, 2015 13:26

  Bummer....:-(
• 0
  
  HiFiBerry team February 22, 2015 18:20

  You can't connect both outputs in parallel. While the chip itself could handle downmixing to mono, this isn't implemented in the driver today. I'm sorry.
  
  Best regards
  Daniel
• 0
  
  Adam McCartney February 23, 2015 11:19

  When you say you cant connect them in parallell,. why is this? i tried it and worked, Will this damage the amp or is it just not advised?
  
  Regards,
  
  Adam
• 0
  
  HiFiBerry team February 23, 2015 15:51

  Yes, this might damage the Amp as both outputs aren't synchronised. This can result in shortages that will damage the Amp.
  
  Best regards
  Daniel