[Magic77]

840 is non-fatiguing and very balanced in the midrange and treble, to my ears.  Hopefully you will like it if you decide to try it.
Edit: i should mention, burn-in mandatory.  It is dark and muffled without it.

I'm interested in the 840's. Are you using them with an amp?

 

[Oregonian]

I'm interested in the 840's. Are you using them with an amp?

I know you were asking Mad Max but I own the 840's as my portable/yardwork headphone with Alpha pads on them and I drive them with a Cayin C5 portable amp hooked to an iPod Touch.  Excellent sound - better than the V Moda M100 both for sound quality and bass and the comfort with the Alpha pads is excellent.  Stock pads on the 840 was the only weakness in my opinion. 

 

[Magic77]

I know you were asking Mad Max but I own the 840's as my portable/yardwork headphone with Alpha pads on them and I drive them with a Cayin C5 portable amp hooked to an iPod Touch.  Excellent sound - better than the V Moda M100 both for sound quality and bass and the comfort with the Alpha pads is excellent.  Stock pads on the 840 was the only weakness in my opinion. 

Thanks. The alpha pads look really nice. I assume worth getting for the 840's. I actually tried the V Moda M-100, but the bass was too loud for my taste. Would you say the 840's have heavy or loud bass? I like good bass, but not too much as to drown out the highs.

 

[RPGWiZaRD]

 
I know you were asking Mad Max but I own the 840's as my portable/yardwork headphone with Alpha pads on them and I drive them with a Cayin C5 portable amp hooked to an iPod Touch.  Excellent sound - better than the V Moda M100 both for sound quality and bass and the comfort with the Alpha pads is excellent.  Stock pads on the 840 was the only weakness in my opinion. 

Doesn't the alpha pads affect the sound though? My experience most of the time when you add thicker pads is a more V-shape transformation, the mids gets less thick, the sharpness of treble tend to stand out more etc. That's the reason I prefer the shallow stock pads on Q40 for example because the mids have this lovely thickness and forwardness to them. I do add a thin layer of papertowel beneath the pads, only so much so it stops the driver baffle pressuring my ear so it doesn't change the sound signature but I notice when I add too thick layer beneath the pads or when I've just stuffed the pads with that extra layer then the first few days or weeks the sound will be slightly more V-shape (brighter, less thick, less smooth) until the papertowel has been compressed.
 
Of course for some headphones that are overly warm/smooth that can be a good thing, the 840 for an Ultrasone seems to be relatively smooth judging from the frequency response when most of them are somewhat bright.

 

[Dyptorden]

Can anyone compare the 840 with Sony's MDR-1AB? They are both bassy afaik, and in the same price range...
 
Thank you,

 

[SX3900]

+1 for the alpha pads, I have them on my 840 as well.

 

[SX3900]

 
Doesn't the alpha pads affect the sound though? My experience most of the time when you add thicker pads is a more V-shape transformation, the mids gets less thick, the sharpness of treble tend to stand out more etc. That's the reason I prefer the shallow stock pads on Q40 for example because the mids have this lovely thickness and forwardness to them. I do add a thin layer of papertowel beneath the pads, only so much so it stops the driver baffle pressuring my ear so it doesn't change the sound signature but I notice when I add too thick layer beneath the pads or when I've just stuffed the pads with that extra layer then the first few days or weeks the sound will be slightly more V-shape (brighter, less thick, less smooth) until the papertowel has been compressed.
 
Of course for some headphones that are overly warm/smooth that can be a good thing, the 840 for an Ultrasone seems to be relatively smooth judging from the frequency response when most of them are somewhat bright.

For the Q40, I have the HM5 pads on them, love the bass, very good mids. Each ear is different.....

 

[djmuzi]

Why the Performance 820 is forgotten here?

 

[Dobrescu George]

  Why the Performance 820 is forgotten here?

 
Mostly because it was not a part of the original release on the Performance series. 
 
Is it any good? 

 

[Mad Max]

Why don't you try it and let us know? 

 
 
 
 

I'm interested in the 840's. Are you using them with an amp?

 
My modified M-Stage.

 

[Dobrescu George]

  Why don't you try it and let us know? 

 
 
 
 
 
My modified M-Stage.

 
I liked ultrasone dj one pro because they are somewhat revealing and bright. I still add +12db on 12KHz of treble to get them to work with my tastes, so I doubt I want to pay for something like lower tiers headphones which are smooth in general. 
 
I need my treble in music

 

[erasure]

Is it fragile ? how it is compare to beyer dt770 pro 32 ?

 

[erasure]

  Is it fragile ? how it is compare to beyer dt770 pro 32 ?

The question is about the 840 model

 

[Dobrescu George]

  The question is about the 840 model

 
Performance series is not exactly fragile by any means. 
 
It's not exactly the most rugger headphone ever, but Ulrasone headphones in general resist for 5-6 years of usage with nothing more than a few scratches. 

 

[erasure]

   
Performance series is not exactly fragile by any means. 
 
It's not exactly the most rugger headphone ever, but Ulrasone headphones in general resist for 5-6 years of usage with nothing more than a few scratches. 

I already have the Ultrasone HFI-2400, HFI-550 & PRO 550 is the 840 a better choice for EDM music ?