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**Hifiman HE-400 Impressions and Discussion Thread** - Page 1020

post #15286 of 19825
Quote:
Originally Posted by mlxx View Post
 

Not disagreeing with you either regarding damping factor (maybe your post wasn't the correct one to quote).

 

People avoid high output impedance amps because of damping factor concerns, once they hear that planars aren't really affected by damping factor they then think its OK to get high output impedance amps. Just trying to point out that this isn't always the case.

 

High output impedance amps are not suited for low impedance headphones unless they can provide the required current. The exact same amp but with a low output impedance will push more current (for the same power output) and work more efficiently when matched with low impedance headphones. Its not just about power, its about current for planars.

 

My HE400 sound worse on my NAD 326bee amplifier which has 60ohm output and other than that is supposed to be a good headphone jack, the STX sounds a lot clearer etc.

post #15287 of 19825
Quote:
Originally Posted by manbear View Post
 


It all depends. An OTL tube amp, like my Little Dot MKIII, has more power at higher impedances. I used my 300 ohm series resistor adapter with the HE-400 (as per Malveaux's recommendation in the the Emotiva thread) in order to bring the HE-400 into the optimal range of the Little Dot. The Little Dot put out more power with the resistor adapter, since its power is maximized when seeing a load in the 300-600 ohm range. ~ 3x more power than at the HE-400's native impedance of 38 ohms. Again, though, this is an amp with an output below 10 ohms. Even though it's an OTL with more power into higher impedance loads, it's not really "high output impedance." 

 

Not familiar with this amp but I doubt its <10ohm for OTL (specs only show preamp out of 600ohms). I this case, adding the resistor changed it for the better so you did still notice a difference :D. If its underpowered, one of the first things to go will be the bass.

post #15288 of 19825

I have been trying to use EqualizerAPO, Sinegen and a realtime EQ (PEQGUI-10MC, posted in another thread on here) to try and get a flat response. Found it too hard to do it by ear alone with just Sinegen. This way its possible to adjust the EQ in realtime to eliminate the dips/peaks, its easier to work out the dB levels. Unfortunately, Sinegen doesn't want to play ball, it keeps pulsing for some reason and starts/stops the signal.

post #15289 of 19825
Quote:
Originally Posted by mlxx View Post
 

I have been trying to use EqualizerAPO, Sinegen and a realtime EQ (PEQGUI-10MC, posted in another thread on here) to try and get a flat response. Found it too hard to do it by ear alone with just Sinegen. This way its possible to adjust the EQ in realtime to eliminate the dips/peaks, its easier to work out the dB levels. Unfortunately, Sinegen doesn't want to play ball, it keeps pulsing for some reason and starts/stops the signal.

 

You need to set / save the DB of each frequency you select in sinegen..... Then you can click between them and you will notice any changes in volume, also you can download a frequency sweep and run that. If it starts pulsing then just switch it off then on again using the power button.


Edited by nicholars - 12/17/13 at 10:46pm
post #15290 of 19825
manbear, you get 3x the power but that resister is dissipating 7x the power of the he-400 right? Resistance is proportional power, P = I^2 * R. What did it sound like with/without the adapter?
Edited by bdr529 - 12/17/13 at 10:49pm
post #15291 of 19825

not to bring up a much-discussed topic, but I was wondering about the velour pads. I am finding them less comfortable than the pleathers. I think it's because of the clamping force... do the velours soften up slash get less stiff over time?

post #15292 of 19825

SOme people say that soaking them in hot water and squzing them out, letting them get dry helps with this.

Personally i did this on the Beyer pads and it helped a bit.

post #15293 of 19825

my receiver is one of the most common brands and a very common model due to the price they can be had for and directly coming from marantz support "the headphone output on your 5006 is most definitely directly coupled together with a resistor as are all our recent models"

post #15294 of 19825
Quote:
Originally Posted by DoctaCosmos View Post
 

my receiver is one of the most common brands and a very common model due to the price they can be had for and directly coming from marantz support "the headphone output on your 5006 is most definitely directly coupled together with a resistor as are all our recent models"

 

Yes but brands like NAD and Marantz are expensive and good quality so maybe they do have direct headphone jacks, but a lot of AV receivers don't... that amplifier is quite a lot of money and it is probably still worse for headphone use compared to a £200 headphone amp... I have a £350 NAD 326bee with a headphone jack from the main amp and it still sounds worse with the HE400 than my £100 xonar STX....so I am not sure what the point of your posts are really... Sounds like you are just trying to justify your amplifier as being good for headphones or something... It is not really any help to anyone else and is basically misleading. If someone wants an amplifier for the HE400 then buying an AV amplifier and using the headphone jack is quite blatantly not the best idea.... Unless they want an AV receiver and are not bothered about the quality of the headphone amplifier.... In which case they would be posting on an AV receiver forum asking what AV receiver to use for their home cinema.... It is just a bit irritating when people make pointless one liner comments which are completely misleading and pointless.


Edited by nicholars - 12/18/13 at 10:28am
post #15295 of 19825

Does anyone in the UK have some Jergpads for sale by any chance?

post #15296 of 19825
Quote:
Originally Posted by nicholars View Post
 

Does anyone in the UK have some Jergpads for sale by any chance?

In a few weeks maybe. AFAIK Modulor will be finishing and shipping out a whole batch of the modded pads by the end of this week, and some of them may be to British users, and some of those may end up on FS/T forum for one reason or another.

post #15297 of 19825
Quote:
Originally Posted by Soundsgoodtome View Post

Any goal with reinstalling the pad? Or just experimenting?


Experimentation. The JergMod guide claims that the foam spacers negatively impact sound and should be discarded. I am not so sure that I should take that advice. The feel of the pads is different with spacers vs without, and they help ensure my ears are not directly touching the drivers.

 

That said, yesterday some of the treble energy was back after reinstalling the foam spacers (particularly with a piano piece), suggesting that the pleathers are still more fatiguing to my ears. It could be placebo however - meaning I just didn't notice that a quantity of energy was still there even after the mod. Maybe I should cut even more holes!

 

It is confusing anyhow, the foam for the spacers is pretty dense, but surely more absorptive than the plastic mounting rings themselves. I can only assume that the added distance from the driver has a slight impact on the presentation of sound.


Edited by MrMateoHead - 12/18/13 at 11:29am
post #15298 of 19825
Quote:
Originally Posted by Thujone View Post
 

Sounds like the DT880 may be a good choice for you.


This was the phone I was leaning toward before discovering the HE-400. In hindsight, I am glad I passed. It is pretty pricey, and I am not sure I would be into Beyers that some have called "sterile" or "analytical" - I like SOME pop and personality after all!

post #15299 of 19825
Quote:
Originally Posted by nicholars View Post
 

 

Yes but brands like NAD and Marantz are expensive and good quality so maybe they do have direct headphone jacks, but a lot of AV receivers don't...

I would tend to side with you on this Nicholars - Mainly because I highly doubt the headphone jack is a top priority in today's feature-packed super-competitive low-mid range receivers (which have auto-EQ, mic inputs, HDMI/Composite switching, 7 channel amps, video/audio processing, Wi-Fi, Networking, Streaming, Ethernet, etc etc). Even Smart Phones / Tablets / Computers are not designed prioritizing audio quality (despite playing a central role in storing our music), so why should just any device be good nuff'? Anandtech just tested a few cellphones and the performance of most suggested that there is definitely no "standard" level of performance to be expected.

 

I'd happily put a $130 O2 amp up against any other device up to $1000 to test for performance with headphones. SOME dedicated equipment is definitely worthwhile! And here I thought I was the one tending to preach the value of passing on expensive audiophile electronics that are too much marketing / too little performance oriented!

post #15300 of 19825
Quote:
Originally Posted by MrMateoHead View Post
 


Experimentation. The JergMod guide claims that the foam spacers negatively impact sound and should be discarded. I am not so sure that I should take that advice. The feel of the pads is different with spacers vs without, and they help ensure my ears are not directly touching the drivers.

 

That said, yesterday some of the treble energy was back after reinstalling the foam spacers (particularly with a piano piece), suggesting that the pleathers are still more fatiguing to my ears. Maybe I should cut even more holes!

 

It is confusing anyhow, the foam is pretty dense, but surely more absorptive than the plastic mounting rings themselves.

 

I had the same issue with driver touching the ears with it removed.. but doesn't putting the spacer back cover the holes cut out and defeat the purpose?  As yet I haven't done this mod but want to do it soon, still not convinced it will help the he400. What they should do is have spacers made of the same foam material that is inside the pads.

 

On another matter.. managed to get this working with sinegen. Its possible to use sinegen and EQ in realtime to get the FR even. It has only 10 bands but the are settable to any frequency, at this stage I have been working on the 1kHz-4kHz area. You can use the slider in sinegen to sweep and then adjust the EQ and then retest and adjust again. There are so many variations in the FR its still not that easy though. Must be some kind of microphone setup that can do this automatically.

 

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