First amp question

bigaudiofanatic
bigaudiofanatic Posts: 4,415
edited January 2011 in Electronics
I have a question concerning my new addition. When I shut down everything and the amps power switch is still on after 30 seconds of everything being shut off except the amp. I get a hum threw my speakers. Is this something I can fix? It is already being ran threw the power conditioner. Also do I need special rca cables between my amp and receiver?
HT setup
Panasonic 50" TH-50PZ80U
Denon DBP-1610
Monster HTS 1650
Carver A400X :cool:
MIT Exp 3 Speaker Wire
Kef 104/2
URC MX-780 Remote
Sonos Play 1

Living Room
63 inch Samsung PN63C800YF
Polk Surroundbar 3000
Samsung BD-C7900
Post edited by bigaudiofanatic on
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Comments

  • zarrdoss
    zarrdoss Posts: 2,562
    edited January 2011
    What kind of amp is it? does the light eventually go out?
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  • Pycroft
    Pycroft Posts: 1,960
    edited January 2011
    Not sure if this matters, but I was told turn the system on in this order: Source/Preamp/Amp, and turn it off in the opposite - Turn volume down on preamp then off: Amp/Preamp/Source. I did find - especially with my tube amp, that when off, the tubes would still send some power, and if I switched off the preamp too soon, there would be a pop in the speakers.

    Regarding your issue, you may want to switch off in that order and that may help. As to why it's happening, I'm an idiot - what do I know?

    James
    2 Channel/HT:
    Sony SS-M9 P's (ES version)
    Sony SS-M1CN Center Channel
    Polk RT800 Surround Speakers
    Odyssey Stratos Dual Mono Amplifiers
    TAD 150 Signature Tube Preamp
    Harman Kardon HK354
    Sony SACD Player
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  • bigaudiofanatic
    bigaudiofanatic Posts: 4,415
    edited January 2011
    I am trying to avoid having to go turn off the amp or is that something I have to do? The light stays on because the switch is still on. The noise is there only when the rest of the stuff is off. Amp and everything I am running is in my signature.
    HT setup
    Panasonic 50" TH-50PZ80U
    Denon DBP-1610
    Monster HTS 1650
    Carver A400X :cool:
    MIT Exp 3 Speaker Wire
    Kef 104/2
    URC MX-780 Remote
    Sonos Play 1

    Living Room
    63 inch Samsung PN63C800YF
    Polk Surroundbar 3000
    Samsung BD-C7900
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  • dorokusai
    dorokusai Posts: 25,577
    edited January 2011
    bigaudiofanatic wrote: »
    I have a question concerning my new addition. When I shut down everything and the amps power switch is still on after 30 seconds of everything being shut off except the amp. I get a hum threw my speakers. Is this something I can fix? It is already being ran threw the power conditioner. Also do I need special rca cables between my amp and receiver?


    You do know what a capacitor in an amplifier does right? What's it matter if your amp is on or not? Oh wait, you probably read that thread about keeping it on until 2012.

    Hit mute, or volume down and turn the components off in the opposite order....much like Pycroft stated.

    If you want to keep your amp on, hit mute, volume down and skip the amp. You'll most likely get a pop, not abnormal.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited January 2011
    I have a faint hum in mine when everything is off except the amp, M1.5t. I just turn it off when not in use. You don't need and special cables like ground loop isolating. I don't think its anything that can be fixed because nothing is broken.
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  • tonyb
    tonyb Posts: 33,076
    edited January 2011
    Just turn it off, unless you can hook up a control cable to the avr to turn it on or off at the same time as the avr.
    HT SYSTEM-
    Sony 850c 4k
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    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
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  • Sherardp
    Sherardp Posts: 8,038
    edited January 2011
    Does your amp have auto sense or something like that? Both my amps stay on 24/7 with no problems. The amps should soft power down once your pre goes off I would think. Maybe I'm missing something.
    Shoot the jumper.....................BALLIN.............!!!!!

    Home Theater Pics in the Showcase :cool:

    http://www.polkaudio.com/forums/showcase/view.php?userid=73580
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  • mantis
    mantis Posts: 17,229
    edited January 2011
    Some amps require a 12v trigger to turn on and off , check and see if your amp has a 12v trigger in.
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • bigaudiofanatic
    bigaudiofanatic Posts: 4,415
    edited January 2011
    I do not think it does will look at pics when I get to work.
    HT setup
    Panasonic 50" TH-50PZ80U
    Denon DBP-1610
    Monster HTS 1650
    Carver A400X :cool:
    MIT Exp 3 Speaker Wire
    Kef 104/2
    URC MX-780 Remote
    Sonos Play 1

    Living Room
    63 inch Samsung PN63C800YF
    Polk Surroundbar 3000
    Samsung BD-C7900
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  • bigaudiofanatic
    bigaudiofanatic Posts: 4,415
    edited January 2011
    How about the rca question
    HT setup
    Panasonic 50" TH-50PZ80U
    Denon DBP-1610
    Monster HTS 1650
    Carver A400X :cool:
    MIT Exp 3 Speaker Wire
    Kef 104/2
    URC MX-780 Remote
    Sonos Play 1

    Living Room
    63 inch Samsung PN63C800YF
    Polk Surroundbar 3000
    Samsung BD-C7900
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  • cstmar01
    cstmar01 Posts: 4,424
    edited January 2011
    You shouldn't need any speical type of RCA connector, unless it has something special.

    Cables are things that over time you will want to upgrade, play with, and have fun, but if just starting out you should be good to go with a pair of signal cables or the like. Sidewinders by Audioquest are normally pretty good. Entry level MIT's such as the AVT or EXP line are decent and so are the Kimber Kables as well.

    As funds permit you can upgrade, but there are other areas I would say to hit on your system first before looking at more expensive cables.
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  • bigaudiofanatic
    bigaudiofanatic Posts: 4,415
    edited January 2011
    What about grounding a wire from the amp ground screw to my receiver ground screw?
    HT setup
    Panasonic 50" TH-50PZ80U
    Denon DBP-1610
    Monster HTS 1650
    Carver A400X :cool:
    MIT Exp 3 Speaker Wire
    Kef 104/2
    URC MX-780 Remote
    Sonos Play 1

    Living Room
    63 inch Samsung PN63C800YF
    Polk Surroundbar 3000
    Samsung BD-C7900
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  • cnh
    cnh Posts: 13,284
    edited January 2011
    Some power conditioners can also be culprits. Did you try just plugging directly into a free wall socket?

    As for popping when turning off an amp..that's fairly common--especially if you have Big Caps in there because it takes a while for them to 'discharge'. My amp has 60,000 microfarads in caps and takes about 30 seconds to actually power down.

    cnh
    Currently orbiting Bowie's Blackstar.!

    Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
    [sig. changed on a monthly basis as I rotate in and out of my stash]
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  • kevhed72
    kevhed72 Posts: 5,083
    edited January 2011
    If you hear a hum when everything is powered up and no music, you may have a ground loopy. :frown:
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  • bigaudiofanatic
    bigaudiofanatic Posts: 4,415
    edited January 2011
    kevhed72 wrote: »
    If you hear a hum when everything is powered up and no music, you may have a ground loopy. :frown:

    If you read it is only when it is when everything but the amp is off.
    HT setup
    Panasonic 50" TH-50PZ80U
    Denon DBP-1610
    Monster HTS 1650
    Carver A400X :cool:
    MIT Exp 3 Speaker Wire
    Kef 104/2
    URC MX-780 Remote
    Sonos Play 1

    Living Room
    63 inch Samsung PN63C800YF
    Polk Surroundbar 3000
    Samsung BD-C7900
    · Share on FacebookShare on Twitter
  • FTGV
    FTGV Posts: 3,649
    edited January 2011
    bigaudiofanatic wrote: »
    If you read it is only when it is when everything but the amp is off.

    Then Its a non issue.The noise is occuring because the source impedance seen by the amplifiers input changes when the preamp (or preout of AVR)is turned off.
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