Ultrasone PRO900 - Page 20

I have a pair of Pro 650s and a pair of ProLine 2500s. The burn in is actually a necessity on these things as the harshness goes away after burn in at around 200 hours. I didn't bother to burn them in any further after the 200 mark at relatively loud volumes (near close to 2/3 of from a good beefy source) with a mix album put on repeat and random.

Now, how many months it will take to listing to 300 hours if you listing everyday 2 hours ?
How many hours you have one your PL650?

My point is, that you need some xxx hours burn in on the PL900...

I do not listen to the cans while I'm burning them in. Burn in is finished. 300 hours only takes 12.5 days @ 24/7. I've probably got 600 hours at least, on the cans. Although burn in made an audible difference, by far, the biggest change in sound was accomplished through my modifications.

Well, maybe now You can try your PL650 without the mod ?

Interesting Haa?

[QUOTE=subtle;4761587]But, but, but...I swear they make a very noticeable shift at the 5th hour of the 2nd week during the 4th month of burn in. That unfortunate recessed midrange magically sprouts out of nowhere and transforms the Ultrasones in to the powerhouses they were destined to become. It's an amazing epiphany of sonic proportions. Actually, I'm not 100% certain whether or not that magical day in the 4th month is something I should attribute to the burn in of the drivers or to the burn in of my brain finally acclimating itself to the stunning glorious beauty that is S-Logic.

Either way, somewhere between the 140th and 150th day......PURE MAGIC![/QUTE]
Or your ears adapt to the sound. Theres songs that I hated but they grew on me overtime. I experience burn in everytime I upgrade.

What? Are you kidding? I bought it without the mods. It was terrible. That's why I modded it. Now it's much, much, much better. And, no, it's not because it's burned in. It was burned in to a large degree before I modified it.

Have you read the mod thread?

It was terrible, 600 burn in hours a go...
How much is a large degree in burn in time, 100 hours? "They ran 24/7 for those 4 days". And yes, I read your mod many, many, times. And the only issue I have is the burn in time consideration. I still curious, if you've had a chance to compare them to another pair of 650s since you've done your modification?

Would you like to send me a pair to compare?
The reason I asked if you'd read the thread is because many of the things that were improved by the modifications are NOT things that are affected by burn in. Further, as burn in progressed after the mod, I did scale back the HF attenuation as the highs smoothed out. I guess I'm puzzled why you're going down this path if you read the mod thread.

YGPM.

Yep, you just confirmed my point here...
Look like you start your mod to soon, before the burn in time finish process.
And down this path, you lost altitude.

If you want unmod pair to compare,LOL...
You can visit your local Guitar Center.
Or just open one side and remove the pads,
then listen to the two sides with one modified and the other is not.
It's a little hard to do that, because the human ear is not usually balanced on both sides,
but these things can be tested and corrected with a graph EQ.

I'm also curious about the 2500, if you've had a chance to compare them to your PL650.

With all due respect, you have no idea what you're talking about on any level, and you either did not read the PL650 mod thread I posted in or you did not comprehend the modifications done to the cans.

HeHeHeee...

With all due respect, You are A funny man...

A rare comment from Peter Pinna

It seems to me that it is necessary for someone who is going to judge the sound of the an Ultrasone Headphone, to be accustomed generally to the sound of other Ultrasone Headphones. Specifically, in this case, it would be much better if Jude (or anyone judging and ranking the Pro 900) would have had an extensive familiarity with both the Pro 750 and the Ed 9. If someone is accustomed to listening to non-Ultrasone headphones, part of the challenge for them in evaluating Ultrasone Headphones would be found in first accustoming their hearing to the Ultrasone sound. Until this and sufficient burn-in are accomplished, any judgement of an Ultrasone Headphone would be somewhat inaccurate and probably unfair.

The judgement of ANY headphone should be able to be made in comparison to any other headphone, as well as the ultimate standard, a live acoustic performance. If accommodation to any headphone is a prerequisite to "fairly" judging the Pro900s, then something is awry. It either holds up, or it doesn't.

Reply to Kwkarth

Because of the S-Logic factor, when switching from another type of headphone, Ultrasone headphones can sound somewhat strange to some. Then, after listening for a period, the Ultrasone headphones start sounding better and better. If someone doesn't give adequate time for accustoming themselves to the Ultrasone sound, it would be very easy to misjudge the Ultrasones.

My comments, by the way, are not meant to take anything from the appreciation we all have for Jude's comments. My thinking, though, is that another more thorough review should be written by Jude (or someone else) after they have become much more familiar with the Ultrasone sound.