or Connect
Head-Fi.org › Forums › Equipment Forums › Dedicated Source Components › Audio-gd NFB-28
New Posts  All Forums:Forum Nav:

Audio-gd NFB-28 - Page 21

post #301 of 1576
Quote:
Originally Posted by jodgey4 View Post

I've sent an email, and I am waiting for a reply. There is a constant hiss, I've tried many sockets, surge protectors, even a UPS source... even swapping cables. I live in an apartment complex right now... there's probably enough routers in here to give everyone in a 3 mile radius cancer. This happened before the jumpers. Hopefully Kingwa can help me figure this out, and I won't have to even think about returning this product. Also, I can only hear distorted music playing when using digital inputs. I'll keep searching for answers.

 



frown.gif Sorry jodgey4, I definitely never experienced any distortion in music whatsoever when using the digital inputs (or any of the inputs). There is definitely something not right going on. I would have immediately contacted Kingwa if that happened as it was pretty much brand new while I owned it. And I never experienced any sort of hiss either (but never had any IEMs with this unit). Are your IEMs fine and sound normal on all of your other sources? EDIT: I just noticed that you were experiencing the noise problem with your LCD 2.2's as well, from your previous post/review of them.

It's very strange that you can still hear music and/or hiss even with the volume at zero. Not normal at all. Uhhgg...the one apartment I lived in years ago were horrible on the electrical/power, and they were fairly new construction at the time. My UPS was "blurping" at least a few times every other day! I'm almost certain it saved my Mac Pro tower with outboard RAID disk array, TV, and stereo gear from meltdown. I never had any real issues with power anywhere else that I lived (except maybe in Puerto Rico, LOL).

LOL regarding the wireless router radiation there! But it shouldn't be a problem for the NFB unless one is very close to it...say 2-3 feet or closer.

FYI, I was also using the EXACT computer/source setup that kkcc described...never had any noise or distortion either.

frown.gif I really hope there is a simple solution. Let me know what Kingwa says!
Edited by bbfoto - 5/25/14 at 7:08am
post #302 of 1576

Wonder how does the Compass 2 [ES9018] compares with the NFB-28...

Single-ended use mostly for now, maybe balanced headphone out soon...

post #303 of 1576
Quote:
Originally Posted by kkcc View Post


Yes normal. Designed to protect against too having high volume for high sensitivity gears.


ok for info kkcc

 

btw an update from my NFB-28, the sound got distorted again after around 3 hours of listening, looks like i got defective unit, i hope i can get replacement unit from kingwa, i sent him email with the distorted sound that i record using my cellphone

post #304 of 1576
Quote:
Originally Posted by kkcc View Post



Hope you get these sorted out soon. Did you try if some ther usb DAC works or the nfb28 is the only DAC you have? I had not experienced any of the issues you described. I'm running 64-bit win7 using 32 bit win7 driver for the nfb28. Works perfectly for me in all wasapi, direct sound, or asio modes with fb2k and mediamonkey.

 



I was using this EXACT setup for playback into the NFB-28. Worked great for me as well. Note that the USB driver installation is very particular. There is actually a video included with the USB32 Driver download that details the installation process and specific settings that need to be made.

kkcc, do you have both IEMs and full-size cans? Have you ever experienced any noise floor, hiss, or distortion, even minutely while using your NFB-28? The background was always jet black for the short time I owned this unit. (FYI, for disclosure, I am the former owner of the unit that jodgey4 is discussing here). I only used this unit for a few months, so I'm interested in receiving more impressions from long-term users.
post #305 of 1576
Quote:
Originally Posted by KnightThe2nd View Post


ok for info kkcc

 

btw an update from my NFB-28, the sound got distorted again after around 3 hours of listening, looks like i got defective unit, i hope i can get replacement unit from kingwa, i sent him email with the distorted sound that i record using my cellphone

 



This is when using the USB input only, right? Are you using a USB 3.0 port or USB 2.0 port on your computer? FYI, mine worked fine from either 2.0 or 3.0, but I know some people experience problems with other DACs or devices depending on the computer that's used (different internal USB controller chips and drivers).

Compared to USB 2.0, USB 3.0 implements a lot more "management" or variable control of the power output and data throughput to the connected device. Some devices work fine at first, but may get "confused" after a certain amount of time when the USB controller tries to "manage" or control throughput/output.

It could also be other "processes" that your OS or installed software and programs may be starting up randomly or on a schedule...seems strange that this is always happening near the 3-hour mark. Is your computer or screen set to sleep or hibernate after 3 hours? ...I'm just trying to think of possible things that could be causing this issue.

Do you have another computer to try with the NFB's USB?
Edited by bbfoto - 5/25/14 at 8:06am
post #306 of 1576
Quote:
Originally Posted by bbfoto View Post
 
Quote:
Originally Posted by KnightThe2nd View Post
 


ok for info kkcc

 

btw an update from my NFB-28, the sound got distorted again after around 3 hours of listening, looks like i got defective unit, i hope i can get replacement unit from kingwa, i sent him email with the distorted sound that i record using my cellphone

 



This is when using the USB input only, right? Are you using a USB 3.0 port or USB 2.0 port on your computer? FYI, mine worked fine from either 2.0 or 3.0, but I know some people experience problems with other DACs or devices depending on the computer that's used (different internal USB controller chips and drivers).

Do you have another computer to try with the NFB's USB?


yes, so far i can only use USB (usb 2.0), because right now i dont have other digital source to feed to NFB-28 so i dont know if the coax and optical also affected, but the other DAC/amp that i tried/owned before work flawlessly with my laptop (grace design m903, centrance DACport LX, DACmini, pico dac, HRT headstreamer, HRT music streamer II, Astell&Kern AK10 (use it with my FAD heaven-s IEM), asus xonar u7, TEAC UD-H01, etc) never get truncated songs, no distortion even after long period of continuous use

 

tomorrow i'll try to use my friends MacBook, i'll give an update tomorrow

 

btw the other funny thing is every 1 hour the volume on my NFB-28 automatically increased by 1 (4 hour ago it was 40 right now its 44) and no one touch the volume knob nor remote

post #307 of 1576
Quote:
Originally Posted by KnightThe2nd View Post
 


yes, so far i can only use USB (usb 2.0), because right now i dont have other digital source to feed to NFB-28 so i dont know if the coax and optical also affected, but the other DAC/amp that i tried/owned before work flawlessly with my laptop (grace design m903, centrance DACport LX, DACmini, pico dac, HRT headstreamer, HRT music streamer II, Astell&Kern AK10 (use it with my FAD heaven-s IEM), asus xonar u7, TEAC UD-H01, etc) never get truncated songs, no distortion even after long period of continuous use

 

tomorrow i'll try to use my friends MacBook, i'll give an update tomorrow

 

btw the other funny thing is every 1 hour the volume on my NFB-28 automatically increased by 1 (4 hour ago it was 40 right now its 44) and no one touch the volume knob nor remote

 

Thanks for the info.  Keep us posted!

That last bit regarding the volume change is a feature implemented by Kingwa for your listening pleasure. :D  :p Just kidding!

 

That is very weird!  :blink: 

post #308 of 1576

ok here is the update, tried NFB-28 with MacBook and the result is the same, first half-sec of songs got truncated, and here is the explanation from kingwa

 

"The DAC include DSD playback ability must had the mute design.

Otherwise while playing between PCM and DSD music, will had quite loud switch noise produce by the ES9018 , or other DA chip.
In NFB28 we are applied the relay mute design for avoid effect the sound quality.
It is mute 0.5 second for avoid the DSD / PCM switch noise.

Kingwa"

 

about the distorted sound after 3hours of continuous use, he suggested that i send the unit back to him for inspection

kudos to kingwa for excelent afterales service :)

post #309 of 1576

There's new USB drivers up today as well... I'll try them tomorrow and report back. I'm not expecting any improvements, but Kingwa wants me to test them and get back to him after.

post #310 of 1576
Quote:
Originally Posted by bbfoto View Post

Quote:
Originally Posted by kkcc View Post



Hope you get these sorted out soon. Did you try if some ther usb DAC works or the nfb28 is the only DAC you have? I had not experienced any of the issues you described. I'm running 64-bit win7 using 32 bit win7 driver for the nfb28. Works perfectly for me in all wasapi, direct sound, or asio modes with fb2k and mediamonkey.

 




kkcc, do you have both IEMs and full-size cans?

Check my profile for the phones I'm using. Out of my collection hiss can be detected by the tg334, but only on some volume setting: it would have a slight hiss on volume 5, 6, 7 but not at 8, then again on 9, 10, etc.... so I would pick the points where it is pitch black to use with it (not really that often). The tg334 is ultra sensitive even by iem standard and we sometimes jokingly call it the I use detector. None of my other phones/iems pick up hiss.
post #311 of 1576

I think this will get my nod instead of compass 2... It's just 180 USD more now and it's a better, ready-to-go-balanced unit...

Just FYI :]

post #312 of 1576
Quote:
Originally Posted by KnightThe2nd View Post
 

ok here is the update, tried NFB-28 with MacBook and the result is the same, first half-sec of songs got truncated, and here is the explanation from kingwa

 

"The DAC include DSD playback ability must had the mute design.

Otherwise while playing between PCM and DSD music, will had quite loud switch noise produce by the ES9018 , or other DA chip.
In NFB28 we are applied the relay mute design for avoid effect the sound quality.
It is mute 0.5 second for avoid the DSD / PCM switch noise.

Kingwa"

 

about the distorted sound after 3hours of continuous use, he suggested that i send the unit back to him for inspection

kudos to kingwa for excelent afterales service :)

The NFB-28 has been on my short list, but I was having my doubts as I read this thread. Good to hear about an explanation (and fix?) for the problem,  and the good services kingwa offers.  

post #313 of 1576
Quote:
Originally Posted by jodgey4 View Post
 

There's new USB drivers up today as well... I'll try them tomorrow and report back. I'm not expecting any improvements, but Kingwa wants me to test them and get back to him after.

i already installed the new driver and yeah this 1 better than prev 1, ASIO working well now, prev 1 crass alot when using ASIO

post #314 of 1576
Quote:
Originally Posted by qveda View Post
 

The NFB-28 has been on my short list, but I was having my doubts as I read this thread. Good to hear about an explanation (and fix?) for the problem,  and the good services kingwa offers.  


i use Post/pre-track silence DSP (foobar) for a temp counter measure

post #315 of 1576

Has anyone been able to compare the NFB-28 to the Schiit Mjolnir at all?  I know one is a dedicated amp and the other (NFB) has more features, but any info/thoughts on sound would be great!  Sorry if this has already been covered at all!

ZMF Headphones creates custom orthodynamic headphones. By implementing wood cups, high production tolerances, and truly american handmade quality,...
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Dedicated Source Components
Head-Fi.org › Forums › Equipment Forums › Dedicated Source Components › Audio-gd NFB-28