shut down pop adcom

htrdln
htrdln Posts: 116
edited March 2013 in Electronics
So I purchased the adcomgfa5805 and it sounds great. Its hooked to the 12v trigger on my Denon 4310ci the problem I'm having is that when I turn of the denon I get a pop sound out of the tweeters.
Post edited by htrdln on
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  • ZLTFUL
    ZLTFUL Posts: 5,650
    edited March 2013
    My 555s give a mild thump when they shut down but nothing that I find concerning. Don't know much about the 5805 though.
    "Some people find it easier to be conceited rather than correct."

    "Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
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  • Glen B
    Glen B Posts: 269
    edited March 2013
    IMO the pop is from the Denon and Adcom shutting off at the same time. The Adcom amp has no output relay, so any signal at the input will continue to be amplified after power-down until the power supply caps discharge. Best practice is to always power down the amp first, then the preamp, so that turn-off noises in the preamp are not amplified by the amp. That is not happening with your Denon trigger. Unless the pop is very loud, I would not worry about it.
    Main System: Denon DP-59L | Audio-Technica AT33EV | Marantz SA-11S2 | Classe DR-10 | Classe CA-300 | Classe RC-1 | PSB Stratus Gold i's | DIY Balanced AC Power Conditioner | Acoustic Zen and NeoTech cables | Oyaide and Furutech power connectors | Dedicated 20A isolated ground line.

    Home Theater: Toshiba D-VR5SU | Laptop #1 |Outlaw Audio OAW3 wireless audio system | Marantz SR-19 | Phase Linear 400 Series 2, modified | AudioSource 10.1 EQ (for subs) | Axiom M3 v3’s | Axiom VP150 | Optimus PRO-X55AVs | Dayton 12” powered subs (x2) | Belkin PureAV PF-60 line conditioner.

    Party System: Laptop #2 | Audioquest Dragonfly USB DAC | Technics SU-A6 | Acurus A-250 | Radio Shack 15-band EQ | Pioneer SR-9 reverb | Cerwin Vega DX9's | Dayton 100° x 60° horns with titanium HF/MF compression drivers.
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  • xftman
    xftman Posts: 153
    edited March 2013
    My 555II has the same pop sound with my Onkyo 809 but not H/K 7550D.
    MAIN:
    Front- LsiM 707 (MIT Terminator 2 Bi-Wire),
    Center- lsiM 706,
    Surrounds- lsi F/X,
    Power sub PSW1000,
    Receiver- Harman Kardon Avr 3700,
    Amp - Emo XPR-5.

    Secondary (2.1):
    LsiM 703,
    HK Avr 3700,
    Yaqin MS-30L,
    Polk DSW-PRO 400.
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  • leftwinger57
    leftwinger57 Posts: 2,917
    edited March 2013
    My Adcom 555 dead silent on start up which is immediate, but on shut down I do get that deflating ballon sound .You just imagine those capacitors spooling down.
    2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

    H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

    Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc
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  • decal
    decal Posts: 3,205
    edited March 2013
    It's normal with a lot of Adcom equipment. I had two 535 amps, both did it.
    If you can't hear a difference, don't waste your money.
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  • htrdln
    htrdln Posts: 116
    edited March 2013
    Thanks guys just got the lsi25 for Christmas so am still habit paranoid.. lol
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  • kuntasensei
    kuntasensei Posts: 3,263
    edited March 2013
    I wonder if you could get the proper delay by using something like the Belkin PF60 that I'm using. It lets you feed 12v trigger to the unit, then assign a delay to the 12v trigger output and any switched outlet banks you assign. Just a thought.
    Equipment list:
    Onkyo TX-NR3010 9.2 AVR
    Emotiva XPA-3 amp
    Polk RTi70 mains, CSi40 center, RTi38 surrounds, RTi28 rears and heights
    SVS 20-39CS+ subwoofer powered by Crown XLS1500
    Oppo BDP-93 Blu-ray player
    DarbeeVision DVP5000 video processor
    Epson 8500UB 1080p projector
    Elite Screens Sable 120" CineWhite screen
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  • htrdln
    htrdln Posts: 116
    edited March 2013
    i disconected the 12volt trigger and the pop is gone.
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  • Glen B
    Glen B Posts: 269
    edited March 2013
    kuntasensei wrote: »
    I wonder if you could get the proper delay by using something like the Belkin PF60 that I'm using. It lets you feed 12v trigger to the unit, then assign a delay to the 12v trigger output and any switched outlet banks you assign. Just a thought.
    That's a good suggestion. Its triggering options and programmable delay is perfect for the OP's Adcom. I have a PF-60 in my HT system, and at one time used it to turn on/turn off my Phase Linear Series 2 amp, which has no power switch.
    Main System: Denon DP-59L | Audio-Technica AT33EV | Marantz SA-11S2 | Classe DR-10 | Classe CA-300 | Classe RC-1 | PSB Stratus Gold i's | DIY Balanced AC Power Conditioner | Acoustic Zen and NeoTech cables | Oyaide and Furutech power connectors | Dedicated 20A isolated ground line.

    Home Theater: Toshiba D-VR5SU | Laptop #1 |Outlaw Audio OAW3 wireless audio system | Marantz SR-19 | Phase Linear 400 Series 2, modified | AudioSource 10.1 EQ (for subs) | Axiom M3 v3’s | Axiom VP150 | Optimus PRO-X55AVs | Dayton 12” powered subs (x2) | Belkin PureAV PF-60 line conditioner.

    Party System: Laptop #2 | Audioquest Dragonfly USB DAC | Technics SU-A6 | Acurus A-250 | Radio Shack 15-band EQ | Pioneer SR-9 reverb | Cerwin Vega DX9's | Dayton 100° x 60° horns with titanium HF/MF compression drivers.
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