Air Conditioner Vents and Electronics.

Not sure if this is a warning, a coincidence or just ranting but here goes.............

A few months ago I bought a PS Audio 200C amp. It is 30 years old and I have no idea of its service history (if any) but when I bought it it was dead quiet and sounded great. This thing is is a beast and takes total control of your speakers. You can crank it up till your ears hurt and you still can't see the drivers move. Everything was good until I didn't play it for about a month. Then when I finally turned it on to warm it up there was a loud hiss in one of the channels. It sounded like a ground loop but while troubleshooting I realized I didn't have a ground plug on anything attached to it. I also noticed it got worse after you played it loud for a while. Even after disconnecting everything.

After a little internet searching and still thinking it sounded like a ground loop I opened it up. There were large brass bars for the ground and rails and you could see some white corrosion on everything connected to it. I unscrewed everything (Top and bottom, one at a time) then deoxed or sanded the connections. Hooked everything up again and when I was done and it is dead quiet again.

I was happy that I fixed it but later that night I was reading another forum where someone put an expensive firearm next to an AC vent an it rusted in a couple weeks. Got me thinking and it made sense.......My rack was placed right over an AC vent (with the amp on the bottom). The AC would turn on (a lot lately) and cool the metal below room temperature. But then the AC would turn off and the humid air in the room would condense on it and quicken the corrosion.

Does anyone buy this or was it just a coincidence? Anyone else have this issue?

Comments

  • mlistens03mlistens03 Posts: 2,647
    Makes sense to me. I’ll ask my grandpa tomorrow, he owns an AC business and would know.
    Interesting, to say the least. Judging by the fact that both you and the other guy had a metal something rust, I’m gonna guess that it at least has some truth to it.
    Not Tom or Trey or Jim just Micah
    KEF Q150s, NAD 1155 preamp and 4155 tuner courtesy of DaddyJT, NAD C352 playing power amp, BJC Belden cables, Technics SL3200, Marantz CD6004 courtesy of Clipdat, Salamander Archetype rack, Millenium Falcon :)
    I've always thought the goal of high-end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.

    Resident Child of Club Polk
  • rpf65rpf65 Posts: 2,083
    I can see it happening.

    People normally keep there homes between 75 and 78. Your amp probably has an interior temp around 100. The air coming out of the duct is around 60. Add in about 50 percent humidity, and I can see metal starting to condensate.

    Never really thought about it before. Guess I’ll have to start mentioning it to the few customers I have with floor vents. Can’t really see it as an issue with ceiling vents, which is predominate in the southern area of the U.S.
  • Tony MTony M Posts: 8,366
    I can see it being the reason for sure. I'm glad you took a look and saw an issue and fixed it.
    I'm glad for you!
    Most people just listen to music and watch movies. I EXPERIENCE them.
  • delkaldelkal Posts: 608
    I'm sure the amp had a good start on the oxidation after 30 years but I was surprised how it went from silent to buzzing in a month.

    Now I have to figure out how to avoid it happening again. The wall I have the system on had a floor vent dead center. Right where I would like to put my rack. Looking back I realize I did have the rack almost on top of the vent and if I move it a few feet away that might be OK. But then the rack is in front of the speakers!

    I might have to think about putting the rack on another wall but I don't think that would look as good and I doub't my speaker cables will reach.
  • tonybtonyb Posts: 31,648
    Maybe a simple solution would be to buy a vent deflector and direct that air away from the rack.
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  • EmlynEmlyn Posts: 2,528
    It’s really just not a good idea to locate electronics where a forced air duct blows hot or chilled air directly onto equipment. Dust buildup is another major issue. If there was absolutely no other option I would shut the vent.
    1. Polk LSiM707, 704C, 703; Dual SVS SB2000 subwoofers; Marantz SR7011 receiver; Parasound A23 amp; Oppo 205; Sony 65" 4K TV; FIOS; PS Audio Power Plant Premier; MIT S2 cables
    2. JM Labs Electra 920.1; Sonic Frontiers Line 3 Preamp; Classe Model 25 amp; Sony HAP-Z1ES; Oppo 105D; Music Hall MMF7 and Acoustech phono pre; PS Audio Power Director; MIT S1 Cables
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  • Tony MTony M Posts: 8,366
    I use 2 vent deflectors myself... :o

    That is a GREAT IDEA @tonyb!!! I hope @delkal can use these!

    Here's what I've been using for 25 years in two rooms.
    b7q67e8lj9u1.png
    Most people just listen to music and watch movies. I EXPERIENCE them.
  • delkaldelkal Posts: 608
    edited August 2018
    Tony M wrote: »
    I use 2 vent deflectors myself... :o

    That is a GREAT IDEA @tonyb!!! I hope @delkal can use these!

    Here's what I've been using for 25 years in two rooms.
    b7q67e8lj9u1.png

    I will have to think about something like this. The only problem is that the vent is in the center of the wall and 6 inches in front of 3 connected windows (with sheers in front of them). It would blow the cold air (and later the heat) under the curtains.

    And to make matters worse this is the room that the houses thermostat is in! I can't just block it off.

    Not the best setup but I will figure something out............
  • DaveHoDaveHo Posts: 2,491
    Access to duct work in the basement? How handy are you? Pretty simple to move it.
  • mlistens03mlistens03 Posts: 2,647
    My grandpa hasn’t replied yet. When he does I’ll tell you what he says.
    Not Tom or Trey or Jim just Micah
    KEF Q150s, NAD 1155 preamp and 4155 tuner courtesy of DaddyJT, NAD C352 playing power amp, BJC Belden cables, Technics SL3200, Marantz CD6004 courtesy of Clipdat, Salamander Archetype rack, Millenium Falcon :)
    I've always thought the goal of high-end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.

    Resident Child of Club Polk
  • tonybtonyb Posts: 31,648
    They make those duct vent reflectors in various configurations to blow the air in different directions.....from what I recall anyway.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1430
    Tad 803 speakers
  • ab0tjab0tj Posts: 40
    I'd think the heat cycling probably contributes to loosening internal connections, too.
    Marantz SR6012, Parasound HCA-2200II, LSiM705 L/R, S35 center (yeah, I know...), 2x PSW505
  • tonybtonyb Posts: 31,648
    ab0tj wrote: »
    I'd think the heat cycling probably contributes to loosening internal connections, too.

    Don't know about that, unless your running a blast furnace. :)
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1430
    Tad 803 speakers
  • I would be very worried about the "heat" side of things. I remember those floor vents in our old house in the winter; we don't have those in TX (no basements).
    Yamaha RX-A2050 AVR (5.0.2)
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  • LissMakerLissMaker Posts: 7
    edited December 3
    hey, the main trick is to care properly, i don't think your way will be appreciated, as it's ignoring the antibacterial treatment of the radiator-evaporator in the car cabin. This leads to the fact that the air conditioner not only becomes a source of an unacceptable and unpleasant odor, but can also provoke diseases of passengers. Professional antibacterial treatment of the air conditioner is optimal twice a season.

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    Aicon Services https://www.socool.sg/
  • delkaldelkal Posts: 608
    LissMaker wrote: »
    hey, the main trick is to care properly, i don't think your way will be appreciated, as it's ignoring the antibacterial treatment of the radiator-evaporator in the car cabin. This leads to the fact that the air conditioner not only becomes a source of an unacceptable and unpleasant odor, but can also provoke diseases of passengers. Professional antibacterial treatment of the air conditioner is optimal twice a season.

    _______________________________________________________

    Aicon Services https://www.socool.sg/

    Huh? Are you a Bot?

    Next question.........can a Bot answer you in English?

  • Huh? Are you a Bot?

    Next question.........can a Bot answer you in English?

    Sorry for the disappointment, but I'm not a bot :)

    (P.S. -I'm not a bot
    -A bot said)
    lol, just kidding :)

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