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There's Something About Ultrasone… - Page 303

post #4531 of 5935
Quote:
Originally Posted by Phraxos View Post
Any suggestions on cheap amps that give Ultrasones a warmer quality? (I have the PL2500s). I was thinking Little Dot II++ or Xenos for portability.
Are you looking for an overall warmer (fatter around 200Hz) quality or are you looking to slightly tame the very top end a little?
post #4532 of 5935
Quote:
Originally Posted by kwkarth View Post
Are you looking for an overall warmer (fatter around 200Hz) quality or are you looking to slightly tame the very top end a little?
Both would be nice. Looking for something in the vicinity of $100.
post #4533 of 5935
Quote:
Originally Posted by Phraxos View Post
Both would be nice. Looking for something in the vicinity of $100.
You can achieve a tamer top end by applying a simple mod to the PL2500.
At most fabric shops you can buy this fabric backed foam that I used. It is made for use as headliner material for automobiles.

Remove the ear pads.
Initially, cut a disc to cover the front side of the baffle, covering the driver holes as well as the majority of the baffle.

Replace the ear pads over the fabric/foam disc.

Listen to your cans with a variety of music. When my cans were new (not broken in) this was just right, as far as sound goes. As they burned in, I started cutting a "V" notch in the foam disc to gradually expose the holes in front of the drivers.


As the cans continued to burn in, I gradually opened up the "V."

At this point, when comparing them to my AKGK701, Grado SR-200, and Sennheiser/Cardas HD600s, they're a little brighter than I like so I'm going to cut new discs with a smaller "V" notch in them.

The material is very inexpensive, so for a few dollars I can make dozens and dozens of discs.



I've also applied a smaller disc of Dynamat to the inside of the can and to the front side of the baffle to dampen stray resonance. Additionally, I added a single disc of fabric/foam to the inside of the can to further dampen reflections. Those simple modifications to the 2500 have transformed them from a good sounding can to a great sounding can.

Best of luck!
post #4534 of 5935
kwkarth:

Cooooooool! I'm definately going to give that a try! How well do the earpads fit over that matting? Do you know exactly what the material is called? Thanks for a great suggestion!
post #4535 of 5935
Quote:
Originally Posted by Phraxos View Post
kwkarth:

Cooooooool! I'm definately going to give that a try! How well do the earpads fit over that matting? Do you know exactly what the material is called? Thanks for a great suggestion!
The earpads fit perfectly over the material.

I don't know what the stuff is officially called, but I know its intended use is for headliners in cars. I showed some good close up photos of it so you will recognize it when you see it in the fabric store. It's available in different colors. I chose Proline blue.
post #4536 of 5935
Quote:
Originally Posted by kwkarth View Post
The earpads fit perfectly over the material.

I don't know what the stuff is officially called, but I know its intended use is for headliners in cars. I showed some good close up photos of it so you will recognize it when you see it in the fabric store. It's available in different colors. I chose Proline blue.
Okay, I'll be testing it out soon - I'll post my impressions here!
post #4537 of 5935
I'll have to pick up some of the material to try with my 2200s.

Was watching the Music & Lyrics DVD this weekend and two of the actors were wearing PL650s in one scene. Couldn't tell is they were kwkarth modded, though.
post #4538 of 5935
This is a Proline only issue, right? Because I don't have any problems with the sound of my HFI700DVD.

Larry

Quote:
Originally Posted by kwkarth View Post
You can achieve a tamer top end by applying a simple mod to the PL2500.
At most fabric shops you can buy this fabric backed foam that I used. It is made for use as headliner material for automobiles.

Remove the ear pads.
Initially, cut a disc to cover the front side of the baffle, covering the driver holes as well as the majority of the baffle.

Replace the ear pads over the fabric/foam disc.

Listen to your cans with a variety of music. When my cans were new (not broken in) this was just right, as far as sound goes. As they burned in, I started cutting a "V" notch in the foam disc to gradually expose the holes in front of the drivers.


As the cans continued to burn in, I gradually opened up the "V."

At this point, when comparing them to my AKGK701, Grado SR-200, and Sennheiser/Cardas HD600s, they're a little brighter than I like so I'm going to cut new discs with a smaller "V" notch in them.

The material is very inexpensive, so for a few dollars I can make dozens and dozens of discs.



I've also applied a smaller disc of Dynamat to the inside of the can and to the front side of the baffle to dampen stray resonance. Additionally, I added a single disc of fabric/foam to the inside of the can to further dampen reflections. Those simple modifications to the 2500 have transformed them from a good sounding can to a great sounding can.

Best of luck!
post #4539 of 5935
Hmm... doesn't that expose the driver to some harm?
post #4540 of 5935
Quote:
Originally Posted by Schalldämpfer View Post
Hmm... doesn't that expose the driver to some harm?
I don't think so... how exactly do you mean? There's still that metal cover between the fabric stuff and the driver, no?
post #4541 of 5935
Quote:
Originally Posted by Phraxos View Post
I don't think so... how exactly do you mean? There's still that metal cover between the fabric stuff and the driver, no?
I thought the cutting of the fabric exposed the drivers to the environment, when it's usually shielded from it by the fabric.
post #4542 of 5935
Quote:
Originally Posted by Schalldämpfer View Post
I thought the cutting of the fabric exposed the drivers to the environment, when it's usually shielded from it by the fabric.
I think you might be misunderstanding the nature of the mod - the fabric itself is added. In the stock Prolines there is no fabric there, just the metal plate.
post #4543 of 5935
Quote:
Originally Posted by Phraxos View Post
I think you might be misunderstanding the nature of the mod - the fabric itself is added. In the stock Prolines there is no fabric there, just the metal plate.
Uh... there's a thin sheet of cloth on my 750...
post #4544 of 5935
Quote:
Originally Posted by Schalldämpfer View Post
Uh... there's a thin sheet of cloth on my 750...
The cloth you see is attached to the ear pad and does not get modified in any way.
The modification is fitted under the ear pad and attached cloth.
post #4545 of 5935
Quote:
Originally Posted by HeadphoneAddict View Post
This is a Proline only issue, right? Because I don't have any problems with the sound of my HFI700DVD.

Larry
I've never heard the HFI700 so I cannot comment.
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