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Schiit Mjolnir headphone amplifier - Page 105

post #1561 of 3200
Quote:
Originally Posted by longbowbbs View Post

Before there was Halo there was Norse mythology...It is both a collection of names with a common theme and, hey, they are cool....

 

 

Mjolnir, the mighty hammer of Thor....

 

There was no life before Halo.

 

I like those pendants shown on the wiki page, I think Schiit should have one etched into the amp, like right next to the name. 

post #1562 of 3200
Quote:
Originally Posted by Solude View Post

No because the noise is doubled too ;)  That said the output level of balanced input is the same since the Bryston drops the negative leg.  Ie 3 pins enter, two get grounded, 1 continues through the amp.  I'd have to look again but its also possible Bryston sums the input, same difference.

 

Not quite, most dacs ive looked at that have extensive specs listed, show the balanced output having at least a couple db higher SNR. Like my D2 for instance, 123 vs 126 db single ended vs balanced outputs.

post #1563 of 3200
Quote:
Originally Posted by Solude View Post

No because the noise is doubled too ;)  That said the output level of balanced input is the same since the Bryston drops the negative leg.  Ie 3 pins enter, two get grounded, 1 continues through the amp.  I'd have to look again but its also possible Bryston sums the input, same difference.

 

According to the BHA-1 schematics both XLR pin 2 (+) and pin 3 (-) go to the input buffers (pin 1 is connected to ground). When using the SE inputs the input buffers negative input is connected to ground. Balanced input should normally mean double voltage swing into the power amps compared to SE input (even though the signal is always SE between the input buffers and the power amps). So for HE-6, use the balanced input (driven from a balanced source, of course).

post #1564 of 3200
Quote:
Originally Posted by CanDude View Post

 

According to the BHA-1 schematics both XLR pin 2 (+) and pin 3 (-) go to the input buffers (pin 1 is connected to ground). 

 

But riddle me this.  Where does it go after that if the volume is single ended ;)

post #1565 of 3200

Anyway enough derail... back to Mjolnir.

post #1566 of 3200
Quote:
Originally Posted by Solude View Post

 

But riddle me this.  Where does it go after that if the volume is single ended ;)

 

it could be that its a differential input stage, so its outputting a single ended signal regardless to go to the voltage gain stage?

post #1567 of 3200

It is tied to the output of the input stage, the other end is tied to ground

post #1568 of 3200

 

Quote:
Originally Posted by Dj HyPe View Post

why do schitt use halo armour names? are halo armour names german or something?

 

No offense intended.


Edited by Girls Generation - 10/17/12 at 4:49pm
post #1569 of 3200

Nordic mythology!

post #1570 of 3200
Quote:
Originally Posted by Solude View Post

 

Which makes sense since its a bridged amp, not a differential one.  Ie, single ended input doesn't result in balanced output.  WA22 has the same limit ignoring its output is always single ended :p

Exactly. smile.gif

post #1571 of 3200
Quote:
Originally Posted by Solude View Post

No because the noise is doubled too wink.gif

Are you sure about that, I know there's more (usually 2x) output voltage, but I would be surprised if there's any where near a proportional or corresponding increase in signal noise.
post #1572 of 3200

I'm talking about bridged here.  You have twice the voltage gain because you amp both the positive and negative taps.  Both sides have their own noise contribution, its not like just because you bridge an amp that each side becomes less distorted.  Kevin got into it with Ti back in the day because outside of power gain and slew rate, a bridged amp measures worse in every way.  Higher noise, higher output impedance...  But in the end agreed that the measurements on the B22 were so good that it was academic ;)

post #1573 of 3200
Quote:
Originally Posted by longbowbbs View Post

Before there was Halo there was Norse mythology...It is both a collection of names with a common theme and, hey, they are cool....

 

 

 

Mjolnir, the mighty hammer of Thor....

 

Sometimes I worry about the future of humanity.....sometimes I don't and simply accept we're in deep Schiit.... confused_face.gif

post #1574 of 3200

^^

 

(Dang....where is....) Hey! Found the snare drum!.....

 

Seriously, was that a troll or what?

post #1575 of 3200
Quote:
Originally Posted by Solude View Post

I'm talking about bridged here.  You have twice the voltage gain because you amp both the positive and negative taps.  Both sides have their own noise contribution, its not like just because you bridge an amp that each side becomes less distorted.  Kevin got into it with Ti back in the day because outside of power gain and slew rate, a bridged amp measures worse in every way.  Higher noise, higher output impedance...  But in the end agreed that the measurements on the B22 were so good that it was academic ;)

 

Just to be clear, Mjolnir isn't a bridged amp. It's a circlotron--an inherently balanced, differential in, differential out stage that automatically converts single-ended inputs to differential, thanks to the magic of an input differential amplifier. Yes, lots of differential there.

 

Bottom line, Mjolnir doesn't have the "only one leg driven" problem of some amps you're discussing, nor does it have to compromise by summing everything down to single-ended, then running through a volume pot, then applying the signal to two separate stages, like other amps you're discussing. It's really an elegant solution--the only catch being the complexity of the power supply.

 

I know I'm being pedantic, but people get strange ideas, especially when the thread title is "Schiit Mjolnir Headphone Amplifier." Just a little disambiguation among friends.

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