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Post by welder on Sept 17, 2014 9:11:53 GMT
My stereo sounds different every time I listen to it. I’ve even tried playing the same track at every start up. Sometimes it sounds so different that I could easily believe someone had crept in and swapped some components. I listen to it most days so I can’t believe I’m not familiar with how I think it sounds when I think it sounds its best. Ffs, I should know, I built a lot of it. I’ll have to pick a good day to evaluate warm up times.......hang on, I won’t know if it’s a good day until I’ve listened to it for a while..... Do we think ambient temperature may have an influence? It gets pretty hot here during the day. Maybe all the components need to be at their nominal specified operating temperature. Good grief, there’s going to be an awful lot of stuff to measure in order to be certain that it is changes in the equipment rather than my mood, hearing, ambient noise, stress levels etc etc. Nope, this one is beyond me. I think I’ll just have to settle for some days it sounds fantastic and other days; well, just unsatisfactory and I really have no idea why.
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Post by yomanze on Sept 17, 2014 10:03:13 GMT
From cold my LFD amps are a little bright, and within 10 to 15 mins start to balance back out again. It isn't imagination as many people including Chris and LFD dealers know that it should be properly warmed up. I leave mine on though, only turn off my DAC because it runs in class A.
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Post by zippy on Sept 17, 2014 10:24:09 GMT
My stereo sounds different every time I listen to it. I’ve even tried playing the same track at every start up. Sometimes it sounds so different that I could easily believe someone had crept in and swapped some components. I listen to it most days so I can’t believe I’m not familiar with how I think it sounds when I think it sounds its best. Ffs, I should know, I built a lot of it. I’ll have to pick a good day to evaluate warm up times.......hang on, I won’t know if it’s a good day until I’ve listened to it for a while..... Do we think ambient temperature may have an influence? It gets pretty hot here during the day. Maybe all the components need to be at their nominal specified operating temperature. Good grief, there’s going to be an awful lot of stuff to measure in order to be certain that it is changes in the equipment rather than my mood, hearing, ambient noise, stress levels etc etc. Nope, this one is beyond me. I think I’ll just have to settle for some days it sounds fantastic and other days; well, just unsatisfactory and I really have no idea why. --------------------------------------- - Lots of things that may, or may not, affect the sound quality get discussed (room effects, etc) but to my knowledge you're the first person to mention atmospheric conditions ! As it happens I think you're right - room temperature, humidity, atmospheric pressure must surely affect loudspeakers though I doubt they do anything to electronics. Now there's a whole new topic for discussion...
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Post by ChrisB on Sept 17, 2014 19:29:09 GMT
It's interesting because my LFD is currently on loan to someone and he's reporting to me daily how the sound is changing, confirming what I have witnessed for myself. At first there was lots of detail (lots that he was never getting with his own phono stage) and an amazing soundstage and aptitude at image placement but coupled with what I think of as a thinness to the sound - you might well indeed call it bright. As time moves on, the sound thickens up, gaining body and it seems as though that architectural quality is diminished. However, you soon realise that it's still there, but not quite as starkly portrayed - it's no longer shown against this thin/bright background. My friend has decided he wants one and his experiment is nowhere near its end yet!
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Post by yomanze on Sept 18, 2014 11:26:03 GMT
Yep "thin", "bright" can be similar indeed. Interestingly LFD is one of the only manufacturers I know of who do this:
"A crucial aspect, by which we mean the time-consuming skill involved, is how to ensure that every component is working in complete harmony with not only the next component on the circuit, but with every component throughout the entire piece of equipment. To get this right takes many years of experience..."
This leads me to think that LFD gear is tuned at normal operating parameters, temperature etc., and from cold this balance isn't there.
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