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Naim Transformer Hum or Buzz, how loud should it be?

Discussion in 'audio' started by Napzca, Jul 21, 2020.

?

Does Your Naim Buzz

  1. Yes

    65.0%
  2. No

    35.0%
  1. Mr Pig

    Mr Pig ^'- -'^

    I guess it's similar to the way CD was embraced very quickly by classical music lovers. It was silent and timing didn't matter very much.
     
  2. Dozey

    Dozey Air guitar member

    You are right, I misread it.
     
  3. stevec67

    stevec67 pfm Member

    John Cage 4'33'' perchance?
    I can imagine that just over 4 and a half minutes of "bzzzzzzzz" might detract from the recording.
     
    droodzilla likes this.
  4. Olsen

    Olsen pfm Member

    A lot of the Olive stuff had H&F trafos too, they performed slightly better overall IIRC

    Their 250.2 was dissapointing, the DR much improved but now very expensive
     
  5. vicdiaz

    vicdiaz Just another analog freak...

    Less than a year ago I bought an Olive NAP250 with a H&F transformer that was serviced less than 2 years ago by either Class A or Witch Hat (invoice somewhere in the original box) and it buzzes. I suspect there is some DC in the AC input but have not had time to measure it. Will try a DC blocker to see if it stops buzzing.
     
  6. foxwelljsly

    foxwelljsly Hawkwind and Fire

    I am tempted to concur. However, Quad, Exposure and Sugden amplification can also be noisy and hissy, but I think it sounds splendid. I am sure people that have Naim kit also think their kit sounds great.

    There is a lot to be said for Linn's use of SMPS's as it alleviates these problems as well as filtering out all mains noise.
     
  7. Gervais Cote

    Gervais Cote Predator

    Good point about the switching mode power supply but does someone knows if it’s as durable on the long term when compared to a large transformer with two large capacitors and oversized rectifiers such as in a Naim, Musical Fidelity or Exposure amplifier ?
     
  8. What kind of rack to you keep it in? That can amplify the sound making you think it’s louder than it actually is.
     
  9. My NAP 140 measured 25-30 dB when I measure with smartphone w/ decibel meter application, it measured by the putting the smartphone on the NAP 140 casing. But when I measure at 1m or above, there's only 15-20 dB.

    Is it normal?
     
  10. Tom60300

    Tom60300 Yes, that's a pig.

    I use a recently acquired DC blocker from Bulgaria in order to quiet the Naim transformer buzzing. It does indeed function correctly and I haven't noticed any negative effects on the sound.
     
  11. tiggers

    tiggers pfm Member

    No, you need to send it back to Naim to have the hum re-installed as it's clearly too quiet. Must admit Naim gear does seem to hum slightly and on those rare occasions I want to listen to music with my head on the power amp casing it's very distracting. Far better to get something from China that has been nowhere near European electrical safety legislation so you stand more chance of getting an electric shock if you try and get your ear near the casing! HTH :D
     
  12. say it as it is

    say it as it is pfm Member

    my Nait5i has a sight hum when it actually works! now a door stop as not economical to repair
     
  13. Gervais Cote

    Gervais Cote Predator

    What brand and model if I may ask ?
     
  14. monty

    monty pfm Member

    My Supercap DR, 555PSDR and 500PS all buzz and it does my head in.
    buzz varies throughout the day. My plan is to sort a dedicated consumer unit when I get around to a house re-wire.
     
  15. Woodface

    Woodface pfm Member

    It is probably a cumulative effect. My Supercap was always quite loud. Current gear is silent. I quite like having kit on standby rather than always on. If I remember I sometimes switch the speakers on half an hour before listening but I am not sure this makes a massive difference.
     

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