[kantana]

  Roxanne
 
AKG 3003i
 
Logitech Ue6000
 
Monster noise cancelling headphones.
 
Samsung Note 3
 
Ipod using a Aptx supported bluetooth adapter
 
itouch 5th
 
All the above and I still get the noise when using Bluetooth.

Thanks beemarman, thats the same behavior as me since all my earphones are low impedance.  I tried using my dealers Hugo and it was the same.  I also tried with iPhone 5, iPad 3, windows 7 laptop.  Only consolation is that an attenuator with 100ohms will remove the noise.  Also HD800 doesn't have this issue sice they are 300ohms impedance.

 

[kantana]

  What amp are you using? There is a chance that the hiss coming out of RCA of HUGO , here is a post I found very useful explaining it all:
 
http://www.head-fi.org/t/708051/recommendations-is-there-such-a-thing-as-hiss-less-portable-amp#post_10326970

It's a desktop speaker amp, Teac AH-01.  Let me try with the Hugo on USB if ut has hissing out the RCA.

 

[audionewbi]

  It's a desktop speaker amp, Teac AH-01.  Let me try with the Hugo on USB if ut has hissing out the RCA.

The only amp that I have which is completely hiss free with all my IEM is objective 2 amp, it is the only amp I can trust to test my gears. it sounds signature is neutral. If you can find a locker dealer having it perhaps test it with that, I did and will do tomorrow in more detail but I did not experience hissing using RCA out with my IEM that hissed on HUGO 3.5 jack. 

 

[kantana]

Hugo connected on HD USB out through RCA to amp.  Music paused/stopped pitch black no noise unless I max the volume on both Hugo and amp then use headphone out on amp.  Even then it's lower than using BT on Hugo.

 

[kantana]

  The only amp that I have which is completely hiss free with all my IEM is objective 2 amp, it is the only amp I can trust to test my gears. it sounds signature is neutral. If you can find a locker dealer having it perhaps test it with that, I did and will do tomorrow in more detail but I did not experience hissing using RCA out with my IEM that hissed on HUGO 3.5 jack. 

Thanks audionewbi, we are testing the RCA out to see if Hugo using BT has the same noisy output as when usinh headphone out.  In my testing thats a definite yes.  Using HD USB and no noise on RCA on my amp.  If I max the volume on both Hugo and amp then listen with IEM then I can perceive some very faint brown noise but not hissing and very definitely quieter than what is there when using BT on Hugo.

 

[audionewbi]

  Thanks audionewbi, we are testing the RCA out to see if Hugo using BT has the same noisy output as when usinh headphone out.  In my testing thats a definite yes.  Using HD USB and no noise on RCA on my amp.  If I max the volume on both Hugo and amp then listen with IEM then I can perceive some very faint brown noise but not hissing and very definitely quieter than what is there when using BT on Hugo.

I need to clarify something I did not carry my test using BT perviously, now that I am doing it I have noise for BT regardless whether I am using the RCA or headphone out. That is given as the RCA and headphone of hugo all share the same output. 

BT is something that might have to do with the casing to, some protective casing of devices might impact the signals. For me the BT noise is not an issue as I dont use it but yes I ho hear hissing even with the RCA out.

 

[woodcans]

   
It does seem that it's only low impedance that is doing it, but we have tested with 33 ohms headphones too, and it's fine. So it very much depends upon the headphone as well as the USB source.
 
What I would like to do is test with the noise on the headphones, then listen on the RCA through a desktop. If the desktop is OK, then it shows that the problem is the headphones, coupled with Hugo's low output impedance as we know attenuators solves the issue.

 
 
Using iphone5s w/ BT from 1/4" jack to ER4S there is low level noise that is volume independent that is only heard during pause, quiet passages and during very low volume listening. Placing iPhone on/near/far from Hugo makes no difference. Using RCA out to tu--05, no improvement. Actually usable when necessary, but usb input much preferred.
 
Similar findings when using BT and ZX1 as source, but the noise is just a bit quieter.

 

[kantana]

I don't need an absolute black background when using BT but there is too much noise that distracts from my listening experience.  I can tolerate a low volume hiss as seen on most amps and headphone outs but on the Hugo with BT it is a huge distraction.  I can hear it when there is no music playing eg paused but also on quieter passages of music. 

 

[kantana]

   
 
Using iphone5s w/ BT from 1/4" jack to ER4S there is low level noise that is volume independent that is only heard during pause, quiet passages and during very low volume listening. Placing iPhone on/near/far from Hugo makes no difference. Using RCA out to tu--05, no improvement. Actually usable when necessary, but usb input much preferred.
 
Similar findings when using BT and ZX1 as source, but the noise is just a bit quieter.

 
You can alleviate the noise to some extent by turning the Hugo on it's back, there is a circular plastic window. place the iPhone on that window, you may need to move it around but it should lower the noise to an acceptable level.  Only problem is I don't use my mobile phone in such a way when moving around.

 

[woodcans]

   
You can alleviate the noise to some extent by turning the Hugo on it's back, there is a circular plastic window. place the iPhone on that window, you may need to move it around but it should lower the noise to an acceptable level.  Only problem is I don't use my mobile phone in such a way when moving around.

 
I'll try that, but yes, does sort of defeat the purpose of using BT.

 

[podeschi]

Podeschi, what earphones or headphones did you use for BT from the Hugo? I'm strongly suspecting the problem is more noticeable from earphones or lower impedance IEMs.  Pls let us know so we can test this on our units.

Beyer T1. Will try my Ety er4p today.

 

[kantana]

Hmm Beyer T1 is 600 ohm impedance right?  You shouldn't be hearing noisy BT on that unless there's something we don't know about.

 

[muah]

bluetooth from my iPod touch lying on the Hugo, no hiss heard from my Fostex T50RP.
 
but with TG334, slight hissing when no music playing, but kinda of mask it when music starts.
 
just my contribution to the BT-saga.

 

[SoundFreaq]

Hugo is up for sale at Custom Cable for £1,199 or about $2K. Original Chassis only. Hard to resist!

 
Now down to £999 with a free Vertere cable. 
 
Done. 

 

[bpcans]

Now down to £
999 
with a free Vertere cable. 

Done. 

All jokes aside, really?