100 + hours and they do indeed benefit from some time. The bottom end has tightened up a bit, for lack of a better term.    Very enjoyable headphones.

As I'm approaching 90 hours on them, I'm becoming more convinced that I have no real need for a headphone amp. Except maybe to satisfy my curiousity about them.  What was already a nice bottom end, has "opened" up and become even more distinct.  I've been listening to just about every music...

I am listening to my PS1000's through my restored 70's monster receiver, a Sansui 9090DB.  Sounds great.   Would I have anything to gain by purchasing a headphone amp?

I don't see how they could sound much better, but I'm no expert.  They will be broken in soon, regardless.  :)

Quote: A major upgrade from My Ultrasone HFI 780's and Sennheiser 600's.  They make those sound pretty pale in comparison.   To use the cliche'd phrase, I'm hearing things in my music that I've not heard before.  My Ultrasones seem cramped and muddy in comparison, and the 600's sound...

Got my PS1000's today. I am very impressed, to say the least.  I have a whole new music collection to listen to now.

My Christmas present to myself arrives tomorrow, a set of Grado PS1000's.   Will they require a "break in" period?   Will they sound different after being broken in?   I have read a little on break in, but I still wonder exactly what happens.   Thanks!

Headphones for sheep is what Beats are.    

I'm wondering if getting a headphone amp would be any big upgrade over using my 70's vintage monster Sansui 9090DB would be any large improvement. For my ears, the 9090DB sounds really sweet with my Ultrasone 780's.  I'm just wondering what all the hoopla over headphone amps is about.   ...

I listen to just about all genres except hip hop, and my sources are an iPad, vinyl, and a CD player, all piped through the Sansui.  I favor metal, electronica, prog, and late 60's/early 70's rock.   I guess there is no real answer to a lot of "what sounds best" type questions. I'm satisfied...

Getting a little off topic, but would a headphone amp be a large improvement over using my mid 70's Sansui 9090DB monster receiver?  I love the old time, analog sound I get. Especially with vinyl.   I've been really happy with the 780's. Just looking for something new.        

Thanks for the replies.   I'm just wondering if its a big enough "jump" to even bother with. Or if I should just take the big leap and get something like Edition 8's or even switch brands to something like Beyerdynamic Tesla T1 ?   BTW, I listen through my fully restored Sansui 9090DB...

I've been using HFi 780's for a couple years now, and like them a lot. I've got the itch to try something a little pricier.  Can anyone tell me if going to the Pro 900's is worth it?  How do they compare soundwise?    Thanks in advance.    

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