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How to power on amps with no on/off switch?

Discussion in 'General Audio Discussion' started by z-adamson, Sep 10, 2018.

  1. z-adamson

    z-adamson AK Subscriber Subscriber

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    I know I can plug in and unplug to turn on and off, but I was hoping that there is a better way.

    Is there some kind of power strip with a heavy duty switch that would allow for powering on and off amplifiers? A switch heavy duty enough to power of 2 or 3 amplifiers at once without wearing out in short order?

    Amplifier in question: Hafler DH200 with switch bypassed.

    If I could hook 3 DH200 amps to a single strip and power on and off all 3 at once and do so reliably, cool. What kind of strip would you recommend?
     

     

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  2. petehall347

    petehall347 the brandy coffee man Subscriber

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    1800w at 120v . but there will be spike as they charge up ... i would go for highest rating of the outlet .. not a good idea going larger .
     
  3. z-adamson

    z-adamson AK Subscriber Subscriber

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    What if I was to make my own box, wire it with 10 or 12 gauge, use two duplex receptacles and a single toggle switch (like a light switch). Receptacles and switch rated to 20 amps?

    Would this work? I am more worried about the switch than I am the receptacles. Turning off and on with this load could lead to arcing and premature wear I think.

    It's mostly the surge at turn on that can result in high current draw. In use, they will not be playing full-tilt...
     
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  4. petehall347

    petehall347 the brandy coffee man Subscriber

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    light switches so far as i know wont be expecting the same current as something plugged into the wall .. you have to check the current rating of what you want to use . which cannot be more than is available . well it can for a brief moment ..
     
  5. avionic

    avionic " Black Knights " Subscriber

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  6. petehall347

    petehall347 the brandy coffee man Subscriber

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    ideal for a 24v DC fairground merry go round .. that switch reminded me about the job i was called out to do ...
     

     

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  7. WaynerN

    WaynerN AK Subscriber Subscriber

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    Light switches have the same amperage rating as the branch circuit, 15 amps. These switches are also used to make outlets switched to operate table lamps, etc.
     
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  8. robert_kc

    robert_kc AK Subscriber Subscriber

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    Wemo Mini Smart Plug (approx $30), rated at 1800 watts.
     
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  9. hugo454

    hugo454 Gold Member Subscriber

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    Line conditioner
    And some of them have built in delays so that they don't all start at the same moment
     
  10. petehall347

    petehall347 the brandy coffee man Subscriber

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    different there than here then ..
     
  11. bowtie427ss

    bowtie427ss arigato gozaimashita Subscriber

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    If the amplifiers don't have in-rush current limiting you need to power them sequentially.

    Google "power sequencer"

    The "Rockn Stompn" is pretty cool with adjustable delays.

    http://www.rocknstompn.com
     
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  12. Hyfi

    Hyfi Addicted Member

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  13. hjames

    hjames dancing madly backwards ... Staff Member Moderator Subscriber

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    I use Adcom ACE-515 switches and power conditioner units. Its an old Vintage piece -
    it has a sense cable you plug into a switched power outlet on your preamp, tuner or whatever you use as a friend end -and provides delayed power up and power down sequences for your power amps.
    I have 2 in my system, one for the main power amp, and one for the secondary 5ch amps for surround channels.
     
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  14. savatage1973

    savatage1973 Addicted Member

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    I use Furman or Monster Power units on all of my systems--surge protection, line conditioning, and sequencing functions--so one switch powers everything up and down in proper order.
     
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  15. gadget73

    gadget73 junk junkie Subscriber

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    You can buy 20 amp rated switches too. Often they're sold as furnace cut-off switches. I would not use a typical cheesy light switch for something like this. Of course I don't favor the typical cheesy outlets either. I like 20 amp ones with the wire clamps, not the cheap ones that the wire has to wrap around the screws on.

    or replace the switches in the amps and just turn them on in the usual manner.
     
  16. c.coyle

    c.coyle Crisis actor Subscriber

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    A 40 amp triac controlled by a light duty switch? The switch just handles a small gate current, the triac takes the big hit. There's a thread here about switching a single amp with a triac. Shouldn't be hard (or expensive) to do.
     
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  17. z-adamson

    z-adamson AK Subscriber Subscriber

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    You can also buy 30 amp switches (that look like light switched).

    I am thinking about building something with 20 amp receptacles and 30 amp heavy duty switches.

    Still not sure if they are rated for this kind of use.
     
  18. z-adamson

    z-adamson AK Subscriber Subscriber

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    Is it 1800watts at idle or at max output?
     
  19. petehall347

    petehall347 the brandy coffee man Subscriber

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    says 600 max on rear panel . so can only think it is the max it will ever draw .
    although start up current may well be briefly much higher .
     
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  20. z-adamson

    z-adamson AK Subscriber Subscriber

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