Originally Posted by Bill-P
Not to say I'm an expert on the matter...
But given that headphones are physical objects, they get worn out over time, too. Especially as they're in use, since the drivers are constantly accelerating and decelerating.
So from a scientific standpoint, I'd think burn-in SHOULD be real. Unless someone somewhere is claiming that there exist objects that retain its physical properties forever...
Physical burn in does exist, but even for the most "burn in required" headphones, the differences are very small. Day and night differences are all from psychology. Think of it this way, if headphones got several times better after being, or even just changed significantly after a few tens of hours use, shouldn't the companies be burning in drivers before they sell them?
Originally Posted by jaycee1
However, the igrado change was not subtle nor psychological. They were unlistenable and tediously bright. After 60 hours, the very harsh treble had basically disappeared, replaced by a full, warm, bright sound that was exceptionally pleasant.
You'd be surprised what your brain can get used to. If you really think that the iGrados physical improve, you should probably tell that to Grado Labs so they know their product changes a lot with some use, and maybe ask Tyll or someone else with equipment to measure pre/post burn in iGrados.
Originally Posted by BetaWolf
What I've concluded is that is HAS to exist. How is it such a big, scientific, controversial discussion amongst audiophiles if it doesn't exist? Or else, how was it discovered?
As someone else mentioned, bigfoot. As for how it was discovered, someone probably noticed audio equipment sounded better after several hours of use. Burn in is a very logical conclusion to describe what happened if the measurements didn't near disprove it for most pieces of equipment.