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  1. #1
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    Thumbs up Component Warm-up

    I realized that I have never given component warm-up its proper due. I was planning on doing quite a bit of listening this weekend, so I turned my Dodd components on yesterday evening, and left them over night. This morning I went down stairs and turned on some music, and WOW! The sound was more rich and textured, and a better feeling of fullness, weight, and sound stage. I always turned on my electronics before I listened to them for a few minutes, but leaving them on for 12 hours is a whole new world, and really makes the most out of the recent mods to my speakers!

    This is just a good reminder, as it was a topic that had slipped my mind, and a great way to get a little extra performance out of your system.

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    I've noticed that, too. So my amp doesn't get turned off all weekend and my pre stays in standby mode until about an hour prior to the music starting . . .
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    You are talking about tube amps I gather as 30 min warmup for solid state should be plenty

  4. #4
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    Tube preamp and SS amp, and 12 hours of warm-up does sound better than 30 minutes on my equipment.

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    My parasound wanted 30 min as well the krell likes a little more but it worth it.
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  6. #6

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    My experience as well be it tube or SS.
    Speakers: SDA-1C (most all the goodies)
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  7. #7

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    I accidentally discovered the same thing in both my two-channel and HT systems. It takes my two-channel about 2 hours to warm-up, and sounds it best after 24 hours. However, I can't afford the electricity to keep it turned on all the time. My "luxury" treat is I turn it on Friday morning before leaving for work, and it stays on until bedtime Sunday night. This lets me have maximum audio quality all weekend. The same thing applies to my HT. I was impressed the first time I watched it Saturday night after it was accidentally left on Friday night.

  8. #8

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    Me, too . . .
    Toobed Cary pre and switching between Adcom 5802 and Pass Aleph 30 . . . completely warmed-up is the way to go!
    Mains Polk SDA SRS 2 (modified) Sub M&K MX-100
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  9. #9

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    I also found on my Dodd preamp that completely warmed up is the way to go

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    I typically wait 10-20 minutes for the SS gear. Yes, there is a difference from when I would first turn it on to the 10+ minute warm-up. I definitely want to test longer start-up times now. Thanks for the thread.
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  11. #11

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    Quote Originally Posted by GlennDog View Post
    Me, too . . .
    Toobed Cary pre and switching between Adcom 5802 and Pass Aleph 30 . . . completely warmed-up is the way to go!
    Agreed on the Pass Aleph 30. It takes AT LEAST 45 minutes to even start sounding good, but the longer you leave it on the better it sounds.

    The same is true for my BAT VK-200. It takes at least 45 minutes to start sounding good, but if you leave it on for 5-6 hours starts sounding really good. The longer you leave it on, the better it sounds.
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:

    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

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  12. #12

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    I turn on my Odyssey Candela tube pre several hours before serious listening; my heavily modded Stratos Stereo stays on 24/7. If I turn off the Stratos due to a trip out of town, it takes around a day for it to perform at the same level as leaving it on.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA A-L transformer

  13. #13
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    Here is what Hafler says on the issue in their current manuals:

    WARM UP
    In order to achieve the best sonic performance from the amplifier, we recommend letting it warm up for 1 hour before beginning any critical listening. The amplifier will not deliver its full potential sound quality before this time has passe
    d.

  14. #14

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    Aint nobody got time for that!

    I don't do it much because my wife would freak and I've got a 3 yr old running around.
    Usher CP-6311, Shuguang S200MK, Shuguang S845MK, Pioneer BDP-51fd, Essence Audio HDACC, Douglas IC's, Douglas Alpha bi-wire SC's, Pangea/Douglas PC's, Epson 8100

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    Btw, since I've had issues with this part of it, what are the differences you guys hear? Is it just more dynamic, more holographic...?
    Usher CP-6311, Shuguang S200MK, Shuguang S845MK, Pioneer BDP-51fd, Essence Audio HDACC, Douglas IC's, Douglas Alpha bi-wire SC's, Pangea/Douglas PC's, Epson 8100

  16. #16

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    The finer details become more apparent, the bass and mid-bass tightens, imaging gets sharper and more precise in its spatial locational cues and the entire sound stage becomes more focused. It's just an overall better sound. Clearer, more defined, fluid, cohesive.

    Tom
    In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

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  17. #17

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    In my experience, (especially with the Aragon 8008bb) the high end is pretty damn harsh until the amp(s) warm up. As Tom said, detail improves as well as imaging and soundstage. It makes a big difference with some amps and some not as much. I will say that all amps get "better" when warmed up however.
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:

    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

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  18. #18

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    This has me extremely curious. What exactly (to your knowledge) is "warming up" when you leave the amp/pre-amp on and idle? Would the crossovers in speakers then experience the same warmup period thus making them sound better after a period of playing (separate, of course, from the initial break in period)?
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    Quote Originally Posted by drummer86 View Post
    This has me extremely curious. What exactly (to your knowledge) is "warming up" when you leave the amp/pre-amp on and idle? Would the crossovers in speakers then experience the same warmup period thus making them sound better after a period of playing (separate, of course, from the initial break in period)?
    An ignorant guess would be letting all the caps fully charge?
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    Quote Originally Posted by DSkip View Post
    An ignorant guess would be letting all the caps fully charge?
    I would concur as the warm up time would be dictated on how long the unit has been sitting.
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  21. #21

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    That is a good question about cross-overs in speakers warming up. My pre-amp does not have an on/off switch, and my amps consume as much power at idle, as they do playing (except at high levels). I doubt if that affects the speakers since, obviously, there is no sound produced at idle.

  22. #22

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    Quote Originally Posted by BlueFox View Post
    I doubt if that affects the speakers since, obviously, there is no sound produced at idle.
    Well, duh! I meant a playing warmup time. If charging the caps is the theory we're going with, does this also affect the caps within the speakers once you've started feeding sound to them? My knowledge in the area is really limited so I may be asking a completely silly question here but it peaked my interest for sure.
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  23. #23

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    Like I said, that is a good question about speaker cross-over warm-up time. If it does occur it probably only takes a few minutes since there are only a few passive devices to warm up.

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    It's not just about caps. Amplifying devices, whether they be tubes or transistors, have transconductance curves. That is an input voltage results in an output. Power supplies are not always stable upon power up. Gotta get the stuff up to temp where it outputs as designed. Ever bias a tube amp, note how it changes from first power up to when it gets warm and stable. Happens with transistors too. Anyway, warm up and stable is good, how much depends.
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  25. #25
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    From Nelson Pass-
    It's a fact; devices such as Mosfets reach higher transconductance figures at higher
    temperatures, so it's not just a matter of getting the bias to
    stabilize. Also, the higher the bias for Mosfets, the more temperature stable.

  26. #26

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    It depends on A or AB. AB doesn't cook the trannys like A does. Do they bias from transistors or from heat sinks. Newer transistors have internal temp sensors.
    Make yourself necessary to someone. Ralph Waldo Emerson

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    You are referring to Xc and phase?

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    Quote Originally Posted by treitz3 View Post
    The finer details become more apparent, the bass and mid-bass tightens, imaging gets sharper and more precise in its spatial locational cues and the entire sound stage becomes more focused. It's just an overall better sound. Clearer, more defined, fluid, cohesive.Tom
    ^ ^ ^ ^ This.

    Everything just opens up. In my case it's not that the system is unlistenable when the amp has been off and is just powered up, but it sounds so much better with the amp always on. This is recommended by Odyssey (the on off switch is on the back panel).

    I turn off the linestage only because I don't want to drastically shorten tube life.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA A-L transformer

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