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The (new) HD800 Impressions Thread - Page 443

post #6631 of 24278

Excellent, I'm looking forward to hearing impressions with the hd800 + vali and comparing it iwith my own. Of course we all have different dacs so it'll be a bit different. 

 

I'm just looking for a really great budget amp that suits my preference as I won't be afford to afford any of the high end amps for quite a while.

post #6632 of 24278
Quote:
Originally Posted by Frank I View Post
 

Been listening to the HD800 today with the WA22 and it is an excellent combination. The Moon Black Dragon is the cable I am using balanced with the hd800. Making guid music.

Glad you're enjoying the combination Frank. I really did when I owned the WA22.

post #6633 of 24278

I heard the Vali with my own HD800's at Canjam and will be ordering one soon.  It is very good in my opinion.  I like the idea of having a small tube amp I can use on the road with the HD800's. I will be comparing it to my Asgard 2 and my Taboo MKIII once it gets here.  will be also trying it with Modi and Uberfrost.  I expect it to be very nice with either.

 

but as others have said you need to hear it for yourself...:L3000:

post #6634 of 24278
Quote:
Originally Posted by 7ryder View Post
 

I have a question about the HD800s and output impedance.

 

I'm currently using my pair with a Benchmark DAC2 HGC which has an output impedance of close to zero. I read recently on one of the HD800 threads (and I can't find it now) that the HD800s sound better with a higher output impedance (in fact, I think the new Sennheiser amps are in the 40 ohm range or so), otherwise the bass impact is lacking which is what I appear to be experiencing. Frankly, the bass impact from my ES5's with an AK120 is much better on the same material than with my desktop rig.  

 

Have any of you experienced the same with an amp with low output impedance?  Benchmark claims that the zero output impedance provides the best control of the transducers, but based upon the descriptions I'm reading here, I'm thinking that this isn't a good match for the HD800s.

 

I am thinking about getting a SS amp for the HD800s, so should I be looking for an output impedance greater than zero, in the range of the Sennheiser amps or something else?

 

Thanks.

 

ChrisG

 

I think there are 2 separate phenomenon relating to output impedance with dynamic headphones - one is frequency response, and the other is damping factor.  In a headphone such as HD800 the impedance changes across the frequency response.  An amplifier with close to zero output impedance will be least affected by the impedance curve of the headphone and possibly have elevated bass response reflecting the impedance curve.

 

Damping factor affects the ability for the amplifier to provide greater control over the bass response and stop unwanted movement of the driver.  The lower the lower the output impedance, the higher the damping factor.  Some people feel that the HD800 are "overdamped" with amplifiers with very low output impedance and maybe prefer a little more bass decay and possibly boosted midbass due to the impedance curve.  At least this is how I understand these things.

post #6635 of 24278

Ordered the Vali this morning.  Will be comparing to the WA7 with both the WA7 DAC and the Dragonfly.  It will be interesting to see how the DF/Vali combo compares with the WA7.

post #6636 of 24278

In regards to low cost amps for the HD-800, I'll be building the BAL-BAL version of "The Wire" very soon. All for about $140, sans case of course. It might very well be regarded as one of the best amps around for the HD-800, which is why I'm building it. The cost of ownership just makes it that much sweeter :)

post #6637 of 24278
Quote:
Originally Posted by skeptic View Post
 
Quote:
Originally Posted by olor1n View Post

The right side of my headband adjustment is a tad loose. It doesn't quite click and lock along the adjustment markers as the left side. I've detached the headband padding to expose the mechanism. There's a small ball that slides over grooves on the metal part of the headband. I've tried pressing down on the small plate that secures the ball but that doesn't increase the pressure. Has anyone had this issue?

I have the same issue with mine. They don't slide while on my head, but the one side often does if I pick them up by the headband. If you come up with a fix, please let me know. I'm planning to reach out to sennheiser about it sometime soon.

 

Have you tried removing the pad to get to the adjustment mechanism? I'd like to fully detach the plastic arm from the metal band to bend that little plate with the ball. It's locked on the last rung though. Not sure if it'll give with some pull but I don't want to force it.

 

post #6638 of 24278
Quote:
Originally Posted by brunk View Post
 

In regards to low cost amps for the HD-800, I'll be building the BAL-BAL version of "The Wire" very soon. All for about $140, sans case of course. It might very well be regarded as one of the best amps around for the HD-800, which is why I'm building it. The cost of ownership just makes it that much sweeter :)

More info please.  I would like to do some DIY also.  Thx.

post #6639 of 24278
Quote:
Originally Posted by brunk View Post
 

In regards to low cost amps for the HD-800, I'll be building the BAL-BAL version of "The Wire" very soon. All for about $140, sans case of course. It might very well be regarded as one of the best amps around for the HD-800, which is why I'm building it. The cost of ownership just makes it that much sweeter :)

Can it handle all the 12th you throw at it and an even bigger question where did you get that DIY amp?

post #6640 of 24278
Quote:
Originally Posted by koiloco View Post
 

More info please.  I would like to do some DIY also.  Thx.

Sure. I don't know if you have done some DIY amps before, but this isn't beginner friendly because it's SMD. I'd say it's intermediate level though.

 

- Perfectly flat FR from DC to over 100kHz
- No phase shift from 0-100kHz
- No capacitors (except for PSU)
- Extremely low harmonic distortion
- Extremely low IM distortion
- Extremely low noise floor
- Ability to drive down to 4 ohms with no load dependence
- Enough voltage swing to drive any reasonable headphone set.
- Excellent input CMRR
- Simple circuitry using the best parts available.

 

See link below, and scroll down for measurements. Really a remarkable amp that your eyes will have you in disbelief for its size.

http://www.diyaudio.com/forums/headphone-systems/179298-wire-ultra-high-performance-headphone-amplifier-pcbs.html

 

EDIT: The distortion is so low that I'll be hearing my DAC before hearing the amp, and the DA8 is no slouch lol :)


Edited by brunk - 11/25/13 at 7:46pm
post #6641 of 24278
Quote:
Originally Posted by RUMAY408 View Post
 

Can it handle all the 12th you throw at it and an even bigger question where did you get that DIY amp?

See my previous post :)

post #6642 of 24278

Thx!  I will check it out.  I have done plenty of DIY in the past, though not with HP amps.  Only one was a crack with a friend.

post #6643 of 24278
Quote:
Originally Posted by brunk View Post
 

Sure. I don't know if you have done some DIY amps before, but this isn't beginner friendly because it's SMD. I'd say it's intermediate level though.

 

- Perfectly flat FR from DC to over 100kHz
- No phase shift from 0-100kHz
- No capacitors (except for PSU)
- Extremely low harmonic distortion
- Extremely low IM distortion
- Extremely low noise floor
- Ability to drive down to 4 ohms with no load dependence
- Enough voltage swing to drive any reasonable headphone set.
- Excellent input CMRR
- Simple circuitry using the best parts available.

 

See link below, and scroll down for measurements. Really a remarkable amp that your eyes will have you in disbelief for its size.

http://www.diyaudio.com/forums/headphone-systems/179298-wire-ultra-high-performance-headphone-amplifier-pcbs.html

Thank you Brunk.

post #6644 of 24278
Quote:
Originally Posted by koiloco View Post
 

Thx!  I will check it out.  I have done plenty of DIY in the past, though not with HP amps.  Only one was a crack with a friend.

I think you would do OK then. Just find an old motherboard and practice soldering/de-soldering the SMD bits and you should be good to go :)

post #6645 of 24278
Quote:
Originally Posted by brunk View Post
 

I think you would do OK then. Just find an old motherboard and practice soldering/de-soldering the SMD bits and you should be good to go :)

Good tip!  those will take a bit more attention.  General soldering, I have no problem with.

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