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Project Ember Review - Page 29

post #421 of 433
Quote:
Originally Posted by lynx121 View Post

 

Noob here. I'm curious as to how changing the output impedance affects the sound, care to explain and/or describe the sound?

Low output impedance with high input impedance delivers voltage amplification. High output impedance with low input impedance delivers current amplification.

 

You generally want your headphone impedance to be at least x8 greater than the output impedance of the amplifier. If the amplifier's impedance is too high, you will start to hear background noise on more sensitive headphones.

 

Since headphone impedance changes with frequency, the different voltages of different output impedance levels will also change with frequencies. Larger output impedance will result in greater frequency response deviations, and can lead to noticeable sonic changes. May tune this to your preference.

 

Also, larger output impedance has reduced electrical damping. Decreasing electrical damping will most noticeably effect the bass performance, leading to a boomy looser bass with slower transient response and rolled-off extension. This can result in a warm tube-like sound. I believe this is why people say that high gain can give you a warm bass boost, while low gain offers a more transparent sound.

 

Generally, people seem to think that low impedance/low gain is superior for accurate reproduction ("solid-state amp sound"), while higher output impedance/low gain may make your music sound rich, full, and 'euphonic' ("tube amp sound"). Really personal preference I guess, so you can play around with the settings and see what you find & like.

 

Hope this was helpful! :)

post #422 of 433
From a end results standpoint, most balanced armature IEMs have very low impedance specs and will deliver sloppy / bloated bass if driven by an amp with higher output impedance (the Ember's low impedance setting of .1 is perfect in this case). On the other hand, some of the higher end full-size cans with dynamic drivers (Sennheiser, Beyerdynamic, etc.) have a much higher impedance spec and can sound harsh, bright, or excessive in treble if driven with a low impedance amp, but can excel when driven by an amp with higher output impedance.
post #423 of 433
Last night i watched movies with Ember and Audio Gd NFB-2 DAC with hd650 ..... AWESOME.
It's like being there in the scene with the story.
Soundstage depth helps a lot in this case, sound separations and detail is WOW.
Vocals has proper weight, emition detail, separated nicely in the center, all the background sound like insect sound, creaking of wooden floor, wind, dried leafs, bird chirping all clearly heard where it supposed to be, in the background.
It doesn't interfere with the vocal.

I never know hd650 capable of doing all these details, frequency extension.

I am pleased .... wow.
Edited by RedBull - Yesterday at 9:12 pm
post #424 of 433
Quote:
Originally Posted by RedBull View Post

Last night i watched movies with Ember and Audio Gd NFB-2 DAC with hd650 ..... AWESOME.
It's like being there in the scene with the story.
Soundstage depth helps a lot in this case, sound separations and detail is WOW.
Vocals has proper weight, emition detail, separated nicely in the center, all the background sound like insect sound, creaking of wooden floor, wind, dried leafs, bird chirping all clearly heard where it supposed to be, in the background.
It doesn't interfere with the vocal.

I never know hd650 capable of doing all these details, frequency extension.

I am pleased .... wow.


Can I ask what player/source you used (Bluray / DVD or computer?) and how it was connected to NFB-2?  I've never tried headphones watching movies but since I'm retired I've been going to sleep like 4 or 5 in the morning so can't turn up the speaker system.  What's the best or recommend way to connect Bluray player?  I can go HDMI to receiver and coax out to DAC or should I direct with optical or coax to DAC?

post #425 of 433

I do not want to go super complicated way to watch movies with headphone.

I was just using Minix Neo X8-H media player (4 core CPU, 8 core GPU) via Optical out with humble 3  meters toslink cable.

I know 3 meters optical cable is not optimal, but who cares :)

 

For your setup, I think going direct via Coax to DAC might be the best way as it does not have to go through additional complex component like your receiver.

I think coax it better than Optical, but since Minix does not have Coax out, it's better than nothing.

 

Provided your DAC can support ALL audio format from the BluRay like DTS etc, OR

Your BluRay can convert to LPCM 2 channel to your DAC first then your DAC just process 2 channel information.

The former is better, but my setup only allows me to do the later.


Edited by RedBull - Yesterday at 10:06 pm
post #426 of 433
Quote:
Originally Posted by RedBull View Post

 

For your setup, I think going direct via Coax to DAC might be the best way as it does not have to go through additional complex component like your receiver.

I think coax it better than Optical, but since Minix does not have Coax out, it's better than nothing.

 

Provided your DAC can support ALL audio format from the BluRay like DTS etc, OR

Your BluRay can convert to LPCM 2 channel to your DAC first then your DAC just process 2 channel information.

The former is better, but my setup only allows me to do the later.

Thanks for the quick reply.

 

Got it, I know why it didn't work before, I need to change the output format on the bluray to 2 channel like you.

 

Do you know of any DAC that can do the DTS/Dolby Digital?  I don't think I've ever seen one that could but then again never really looked for something like it.

post #427 of 433

No problem David.

 

If I can suggest, I won't chase for DAC that can support all these audio format. 

The format change every now and then your DAC will be obsolete very soon.

 

I let my media player do the update of the Codec through Internet and I enjoy the 2 channel output. 

A little compromise but save money for other amps or headphones, more fun.

post #428 of 433

Good point about format changing.

 

Thanks for the help.

post #429 of 433
Yup. Enjoy your movies via headphones.
I prefer it to my 5.1 Yamaha home theatre any time of the day.
post #430 of 433
Quote:
Originally Posted by RedBull View Post

Yup. Enjoy your movies via headphones.
I prefer it to my 5.1 Yamaha home theatre any time of the day.


Just tired my lanai bluray and it worked with my Teac ah-01, coax connection, HD-700, wow, pretty good surround from headphone, went back to old Star Wars 4: A New Hope, the beginning when the Imperial ship passed over.  Thanks RedBull!

post #431 of 433
Told you so smily_headphones1.gif
I can hear details that i never heard before from my 5.1 systems. Well maybe less bass grunt compared to spekers with sub, but i can exchange that with much more delicate detail. So enveloping.
post #432 of 433
Did you tried with Ember David?
post #433 of 433
Quote:
Originally Posted by RedBull View Post

Did you tried with Ember David?


Can't use the Ember with the AH-01, no line out jacks.  I'm going to try moving my UD-301 out to the lanai as it has line out jacks, will post back later, on a golf trip to maui with girlfriend.  lol posting from my phone while waiting to tee off.

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