Quote:
Originally Posted by ucsf2012 
How long do these have to be burned in before they sound really good? I just got one, and it's not what I expected. Objectively, they're very good for the price, but I thought there's supposed to be an up-front sound to them. Will this come later, or is this pretty much it. It's nearing the 24 hr burn-in mark and it doesn't sound all that much better.
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IMO, the thick foamed comfy pads dull the 'in your faceness' of the sound. Coin modding your pads will open up the 'in your faceness' but they become too shrill, & the bass and very meh.
I sort of wish I hadn't been so eager to mod my pads now I realise they cost £13 to replace...

Still, I've been quite impressed by the sound with the mod I mentioned in my last post...
Do yourself a favour, buy some much cheaper HD414 pads off ebay before you mod the stock comfies... will help the resale value a lot too!
I assume the SR80s, despite the big ol' hole in the middle, 'lift' the drivers off your ears a fair bit? IMO, distance helps a lot..!
EDIT: I just realised nothing I said answered your question. IMHO they change little after the first few hours burn in, but test them again after 40-50. Maybe the sound refines a little, but to my ears nothing drastic...
A little anecdote, I had a pair of headphones which I burned in with pink noise & I reckon they sounded slightly worse after, so now I have a playlist with one track of every different kind of music I have: like 1 live track, 1 classical track, 1 opera track, 1 punk track, 1 jazz track, 1 acoustic track, 1 hip hop track etc etc - Works very well IMO!