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Multiroom with Amp2, which speakers ?

Martin

April 20, 2018 06:50

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Hi!

 I am currenly planning a multiroom set up, based on Raspberry Pi, Amp2 and in ceiling and in wall speakers.

I was thinking of installing those speakers: http://www.davis-acoustics.com/nos-enceintes-haute-fidelite/gamme-integration/100-ro/ and http://www.davis-acoustics.com/nos-enceintes-haute-fidelite/gamme-integration/100-re/.

I have some doubts about the sensitivity. Wouldn't 84 db/W/m be too low for the Amp2?

 I will have 6 different Raspberry (model 3 B) + Amp2. What power supply should I use with such speakers? I will have different speakers in bathroms. That might be 4 ohms speakers, might there be any impact on the power supply I should use?

 Thanks a lot!

 Martin

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7 comments

• 0
  
  HiFiBerry team April 20, 2018 06:53

  Hi,

  with 84db/W/m you will still get up to 97db/m out of the Amp2. As long as you do not plan a huge party, this should be more than enough. I recommend the Meanwell 18V power supply from our shop:

  https://www.hifiberry.com/shop/accessories/meanwell-gs60a18-p1j/

  Best regards,
  Daniel

• 0
  
  Martin April 20, 2018 07:09

  Thanks a lot Daniel.

  Actually, I would like to power all 6 Raspberry and Amp2 with only 1 supply. Would 18V / 20A be sufficient?

  Martin

• 0
  
  HiFiBerry team April 20, 2018 07:17

  I do not recommend this. Power consumption can be highly dynamic which can result in problems cause be inductance and capacitance of the cables between a single power supply and several Raspberry Pis/Amps. While it might work well in many cases, we've also seen users having problems with this setup. Without the right measurement tools and the knowledge how to debug this, this can become quite challenging.

  But if you want to try this, 20A will be more than sufficient as I would assume you would never run all system at the same time at full volume. 

  Best regards,
  Daniel

• 0
  
  Martin May 06, 2018 13:06

  Hi Daniel,

  Would I have this kind of inductance and capacitance issues even if the Raspberry Pis are in the same room? I know this is not the optimal situation, but this is easier to manage and everything has already been wired this way.

  This means I will be in the situation than Cédric in the following guide: https://support.hifiberry.com/hc/en-us/articles/205699981-How-to-build-a-multiroom-audio-system-based-on-Raspberry-Pi-and-Hifiberry.

  Thanks,

  Martin

• 0
  
  HiFiBerry team May 08, 2018 04:27

  Hi,

  in general this can always happen. The shorter the cables are, the lower is the risk of problems. You can try it. In many cases it will work without problems, but this depends a lot of the design of the power supply you're using.

  Best regards,
  Daniel

• 0
  
  Roberto Carvalho July 30, 2018 01:02

  Hi,

  I am quite new to the scene and instead of opening a new thread related to the same subject I decided to do it in here. If wrong let me know.

   

  I am renovating an apartment in a couple of months and I am planning ahead the multiroom sounding.

  So I have a home server that will be running LMS and 2 Raspberry PIs 3 with Hifiberry AMP2 running picoreplayer. To control it Im planning to get an Amazon Fire HD 10 once the 8th gen has been released (probably by the end of the year).

   

  I did some research and I came across the speakers below:

  JBS 5'' https://amazon.com/JBL-SP5II-5-Inch-Loudspeaker-Tweeter/dp/B000EA1OTM/ref=sr_1_1?ie=UTF8&qid=1532911426&sr=8-1&keywords=jbl+sp5ii

  JBS 6'' https://www.amazon.com/JBL-SP6II-Ceiling-Surround-Loudspeaker/dp/B000MFQA0C/ref=sr_1_1?ie=UTF8&qid=1532911657&sr=8-1&keywords=jbl+sp6ii

   

  Polk Audio 5'' https://amazon.com/dp/B00005UKAM/ref=sspa_dk_detail_5?pd_rd_i=B00005T3C8&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=1713835751726239774&pf_rd_r=NRQ6XDYG0XE5E70JWHJ3&pd_rd_wg=1eojL&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&pd_rd_w=WVki0&pf_rd_i=desktop-dp-sims&pd_rd_r=5f9616c3-9392-11e8-8894-7b6c558f7022&th=1

  and Miccas 6'' https://www.amazon.com/dp/B0047PO2Z8/ref=psdc_12097474011_t2_B00005UKAM?th=1

   

  Im planning to install the first pair in the balcony´s ceiling (Glassed Closed) and It is where the majority of the people will be. The Balcony is about 15m2 or 160ft2

  The other pair is going to the living room about the same size and integrates with the balcony so I will need the whole system to sync (picoreplayer).

   

  Can you guys give me a hand, please?

  1- These speakers have to be squared to have WAF. So are those speakers above any good? If not which one would you recommend?

  2- For the sake of simplicity which power supply would best fit my need and deliver enough power for both systems?

  3- What kind of cables should I use to power them?

  4- Also I need it to be foolproof so if someone crank up the volume I cant have it blown away due voltages or whatever...

   

  Thanks in advance!

• 0
  
  HiFiBerry team July 31, 2018 08:25

  Hi,

  I don't have any experience with any of these speakers. I would go for either the Polk or JBL speakers. 

  We do not recommend to use a single power supply for multiple systems as written above. Keep the power cables short, 1.5mm2 should be enough in this case

  If somebody raised the voltage higher than you want it, the same thing will happen as with any normal amplifier - in worst case it distorts and damages a speaker. I'm not sure how "foolproof" you want it. If you're not sure that people don't raise the volume too high, the only way I see it not to give them access to the volume control.

  Best regards,
  Daniel