Question Dirty electricity cleanup devices

Discussion in 'AV Receivers & Amplifiers' started by siltsunrise, Jul 14, 2018.

  1. siltsunrise

    siltsunrise
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    Hi, I don't know where to post this, so sorry if it's in the wrong nook.
    I bought a new arcam avr recently and it buzzed very noticeable, even audible across the room, so I sent it back. The dealer tested his other 3 for me and said they all buzzed. I didn't have the wits to have tested in in another location to see if it might be my electricity (didn't know about that issue then).
    So I don't know if we both just have dirty electrics causing the buzzing or if it's the arcams.
    Soo... just this morn I got the notion to just get a device to clean up any potential dirty electrics and settle the matter, so I can just buy anything without worrying about that. Clever me.
    Does anyone know anything about which devices work best? I'm looking at some tripp lite isolation transformers and ups devices. There's two cheap tripp lite pro ups' for sale here, but I don't know if their cleaning ability is up to par, as they're more for power backup primarily.
    I don't want to spend a fortune.
    Thanks for any advice. :)
     
  2. themovierooms

    themovierooms
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    Arcam's can have some transformer hum which some people are sensitive to, mains cleaners wouldn't really address this in my experience. I have an AVR390 and it does hum a little bit, but not so much to make it annoying.
     
  3. siltsunrise

    siltsunrise
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    What kind of cleaner did you use, if you actually tried it and noted the difference?
     
  4. xmb

    xmb
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    So if they all buzzed then how is an isolation transformer going to help? Themovierooms has already confirmed the Acram units have some hum, so this confirms an isolation transformer will not help.

    If you only connect the speakers and make no other connections to the Acram (do not connect any active sub) and you still hear hum or buzz then it is the amplifier and unlikely to be your electrical supply.
     
  5. siltsunrise

    siltsunrise
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    Well, maybe his hum, but how loud? Who knows if the dirt makes it worse?
    Of course they all hum. But can you hear it 50cm away or 5 meters, or just ear-to-receiver?

    I guess I was thinking to buy one that doesn't buzz at the seller, get the device to keep it that way at home. Seems the arcams are just buzzy though. I just notice it more than everyone else, I'm sure. I grill every seller to listen really well before I'll bite on one.
     
    Last edited: Jul 14, 2018
  6. themovierooms

    themovierooms
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    In my situation I used one of these to try to stabilise the power and make it more efficient in an effort to see if it would suppress it a little-

    Power Inspired AG1500-PSU AC ReGenerator

    Turbo charged the sound quality, still had a hum.
     
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  7. siltsunrise

    siltsunrise
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    Bad link there. My anthem doesn't hum audibly at all, what's up with arcam?
     
  8. themovierooms

    themovierooms
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    Changed it. It wasn't a massive issue for me as the hum is very quiet.
     
  9. siltsunrise

    siltsunrise
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    Thanks. Wish they'd just sort this stuff out at arcam and not make us throw money to fix their problems. Maybe I'll just hang with my anthem. I loved the arcam sound but this is a headache.
     
  10. themovierooms

    themovierooms
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    Loads of products have 50hz mains hum. It can be exasperated by the mains supply. If it is that noticeable chances are you may have an issue with the mains. Very difficult to say but there are hundreds of happy Arcam owners out there including me.
     
  11. siltsunrise

    siltsunrise
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    Does anyone know if the cleanup ability of a UPS is as good as a dedicated power conditioner? I'm looking at about 500 euros for a good one of the latter, but can grab a used Tripp Lite UPS here for 99. I don't have infinite euros to throw at this right now. ;)
     
  12. noiseboy72

    noiseboy72
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    Lots of transformers hum. It can be due to poor mechanical construction, poor mounting or where a transformer designed for 60Hz is used at 50Hz. The term is magnostriction and is due to the iron core contracting and expanding within the transformer itself.

    "Dirty mains" can affect transformers and the proliferation of LED lighting and other equipment with switched mode power supplies is leading to lots of high order - mainly 11th and 13th harmonics. This causes heating in the supply transformers and can increase the current on 3 phase neutral return paths, but has very little effect on domestic equipment transformers. The rest of the power supply rectification and smoothing will remove any remaining "noise" and it is unlikely it will affect the equipment at all.
     
  13. Paul7777x

    Paul7777x
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    I have the smaller version of this one...

    AG500P, AG500 AC ReGenerator 500W with PWM Fan Control, Uninterruptible Power Supply. Power Inspired Ltd.

    Not sure if it killed any hum as the hum I do have is tiny anyway.

    But at least you’d know for certain you have a squeaky clean power supply as it’s a mains regenerator.

    Otherwise I can only suggest you check your supply’s earth connection is sturdy and clean.
     
  14. Trollslayer

    Trollslayer
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    Plus make sure audio cables aren't near mains wiring over a distance.
     
  15. Abacus

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    What was it mounted on, as it may have been mechanical resonance that was being amplified by the support, (Wooden shelf's are a pain for this so better to go for something solid) if so stick a rubber car mat underneath the amp and it should go away.

    Bill
     

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