[CobraVerde]

Quick question team, I have the Phono card installed in my Jot and I am getting hiss when once turn the volume past 12 o'clock. Is this normal?
 
Cheers
 
CV

 

[Smithington]

Hiss or hum? There are other threads on here that talk about phono hiss / hum. Might be worth a read.

http://www.head-fi.org/t/506250/how-do-i-stop-the-hiss-coming-from-my-phono-pre-amp

 

[CobraVerde]

Its hiss, its just as present when the nothing is connected to the unit, the XLR and the rca inputs are dead silent.
 
Thanks for the link btw it looks like a good read

 

[patton]

   
 
The Jot has fully balanced output regardless of the input being SE or balanced.

 
 
In trying to decide what equipment and and audio streaming service I want to keep I went to the following website to compare 16bit vs 8 bit performance.
 
http://www.audiocheck.net/audiotests_dithering.php
 
I have a balanced wire for my HD650s and tested it against the SE output on my Jot. I do not think Im getting more than double the output with the balanced, in fact I'd say its the same. I also have the Mimby and questioning if its truly worth the the extra $. Can anyone confirm if a balanced input is required for the balanced power output advertised on Schiits site:
 
Balanced Headphone Output:
Maximum Power, 16 ohms: 7500mW RMS per channel
Maximum Power, 32 ohms: 5000mW RMS per channel
Maximum Power, 50 ohms: 3000mW RMS per channel
Maximum Power, 300 ohms: 900mW RMS per channel
Maximum Power, 600 ohms: 500mW RMS per channel
Single-Ended Headphone Output:
Maximum Power, 16 ohms: 2500mW RMS per channel
Maximum Power, 32 ohms: 1500mW RMS per channel
Maximum Power, 50 ohms: 800mW RMS per channel
Maximum Power, 300 ohms: 350mW RMS per channel

 

[CarlosUnchained]

   
 
In trying to decide what equipment and and audio streaming service I want to keep I went to the following website to compare 16bit vs 8 bit performance.
 
http://www.audiocheck.net/audiotests_dithering.php
 
I have a balanced wire for my HD650s and tested it against the SE output on my Jot. I do not think Im getting more than double the output with the balanced, in fact I'd say its the same. I also have the Mimby and questioning if its truly worth the the extra $. Can anyone confirm if a balanced input is required for the balanced power output advertised on Schiits site:
 
Balanced Headphone Output:
Maximum Power, 16 ohms: 7500mW RMS per channel
Maximum Power, 32 ohms: 5000mW RMS per channel
Maximum Power, 50 ohms: 3000mW RMS per channel
Maximum Power, 300 ohms: 900mW RMS per channel
Maximum Power, 600 ohms: 500mW RMS per channel
Single-Ended Headphone Output:
Maximum Power, 16 ohms: 2500mW RMS per channel
Maximum Power, 32 ohms: 1500mW RMS per channel
Maximum Power, 50 ohms: 800mW RMS per channel
Maximum Power, 300 ohms: 350mW RMS per channel

 
Correct me if I'm wrong, but output power is not equal to volume, gain is more related.
Both output stages don't have to be necessarily on the same gain level.
 
You may be getting more headroom through balance, but not twice the volume. 

 

[franzdom]

Those nuimbers are probably only relevant at full volume.

 

[patton]

  Those nuimbers are probably only relevant at full volume.

I was playing a 100% maximum volume, dont start there, the test files start at a normal scale volume and slowly get quieter. 
 
 
 

   
Correct me if I'm wrong, but output power is not equal to volume, gain is more related.
Both output stages don't have to be necessarily on the same gain level.
 
You may be getting more headroom through balance, but not twice the volume. 

 
 
Im not sure on that, but I couldnt tell the difference between the two connections at all

 

[MWSVette]

   
 
In trying to decide what equipment and and audio streaming service I want to keep I went to the following website to compare 16bit vs 8 bit performance.
 
http://www.audiocheck.net/audiotests_dithering.php
 
I have a balanced wire for my HD650s and tested it against the SE output on my Jot. I do not think Im getting more than double the output with the balanced, in fact I'd say its the same. I also have the Mimby and questioning if its truly worth the the extra $. Can anyone confirm if a balanced input is required for the balanced power output advertised on Schiits site:
 
Balanced Headphone Output:
Maximum Power, 16 ohms: 7500mW RMS per channel
Maximum Power, 32 ohms: 5000mW RMS per channel
Maximum Power, 50 ohms: 3000mW RMS per channel
Maximum Power, 300 ohms: 900mW RMS per channel
Maximum Power, 600 ohms: 500mW RMS per channel
Single-Ended Headphone Output:
Maximum Power, 16 ohms: 2500mW RMS per channel
Maximum Power, 32 ohms: 1500mW RMS per channel
Maximum Power, 50 ohms: 800mW RMS per channel
Maximum Power, 300 ohms: 350mW RMS per channel

No, a balanced input is not needed.  
 
Regardless of input the output via balanced connector is as listed above...

 

[patton]

  No, a balanced input is not needed.  
 
Regardless of input the output via balanced connector is as listed above...

Im a novice here but I dont understand how that could be possible given the extremely simply test I completed. Same source, dac, amp, and cables between them; the only variable was the connection between my HD650s and the amp. If the 550mW extra, per channel, are indeed there I am not hearing it. Any suggestion on where or how I could hear the difference? 

 

[Letmebefrank]

Im a novice here but I dont understand how that could be possible given the extremely simply test I completed. Same source, dac, amp, and cables between them; the only variable was the connection between my HD650s and the amp. If the 550mW extra, per channel, are indeed there I am not hearing it. Any suggestion on where or how I could hear the difference? 

The volume difference between balanced and single ended is easily noticeable to me and many other people in this thread. I wouldn't say it is double but more like 20-30% more volume. There are other advantages as well such as channel separation and slew rate, better dynamics from the increase in power/headroom. The list of advantages of balanced over single ended goes on.

Are you swapping the whole cable on your 650s or using a balanced>SE adapter?

Your brain can easily forget how loud it was during the time it takes to swap a cable.

If you can't hear the difference then that is fine, but there is a difference.

 

[patton]

The volume difference between balanced and single ended is easily noticeable to me and many other people in this thread. I wouldn't say it is double but more like 20-30% more volume. There are other advantages as well such as channel separation and slew rate, better dynamics from the increase in power/headroom. The list of advantages of balanced over single ended goes on.

Are you swapping the whole cable on your 650s or using a balanced>SE adapter?

Your brain can easily forget how loud it was during the time it takes to swap a cable.

If you can't hear the difference then that is fine, but there is a difference.

Im swapping the whole cable and the test available in the link I provided makes it very easy to compare the volume levels. Has anyone here tested the Jot balanced vs SE output with your own ears to repudiate or substantiate these claims? 
 
 
Edit-
Just to be clear, Im not making any generalizations about SE vs balanced. I am specifically referring to an unbalanced input on the Jot and comparing a balanced vs SE output. 

 

[watchnerd]

   
 
In trying to decide what equipment and and audio streaming service I want to keep I went to the following website to compare 16bit vs 8 bit performance.
 
http://www.audiocheck.net/audiotests_dithering.php
 

 
Sorry, I'm confused...what does dithering have to do with the Jotunheim?

 

[patton]

   
Sorry, I'm confused...what does dithering have to do with the Jotunheim?

absolutely nothing, but that doesn't negate the question or the validity of the test

 

[mwhals]

Try playing music at your normal volume on SE. Note the volume by using a piece of tape. Now listen to the same song at the normal volume on balancedband see if the knob is in a different position than SE (the tape).

 

[watchnerd]

  absolutely nothing, but that doesn't negate the question or the validity of the test

 
You'll probably get more interest in the topic by posting it in Sound Science, as opposed to plopping it into a Jotunheim-specific thread.