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# Schiit Mjolnir headphone amplifier - Page 144

Quote:
Originally Posted by technica18

I'm confused since someone mentioned much earlier in this thread that unlike the BHA-1, the Mjolnir does not have two separate amplifiers (one for each channel) so in that case how is the Mjolnir a true balanced amp?

At the risk of being:

a: redundant

b: stating the obvious

c: all of the above

bear with me........

an average stereo SE headphone amp with have two amps, one for the left channel, a second for the right channel

The Mo also uses only two amplifiers

one for the left channel and one for the right.

The difference is, each amp in the Mojo has a balanced input and a balanced output, so it is a balanced amp, input to output.  It uses a circuit topology called the Circlotron.

more than you probably want to know about the Circlotron topology here

http://en.wikipedia.org/wiki/Circlotron

Another example of a single amp with a balanced input and a balanced output:

http://en.wikipedia.org/wiki/Circlotron

Matrix sells an amp called the Quatro, it uses 2 amps per channel to create a "fake" balanced amp.

I'm not trying to dump on Matrix Electronics, I own a Matrix M Stage.

Anyway, by now someone thinks I'm

### Gear mentioned in this thread:

Quote:
Originally Posted by Chris J

Matrix sells an amp called the Quatro, it uses 2 amps per channel to create a "fake" balanced amp.

I'm not trying to dump on Matrix Electronics, I own a Matrix M Stage.

You mean like everyone else? Mjolnir is the only balanced amp on the market that isn't a bridged amp or a single ended amp who's output runs one leg and an invertor to create the other leg, cough BHA-1 cough :P  The Dynahi SuSy is another but its not technically on the market... yet.

Quote:
Originally Posted by Solude

You mean like everyone else? Mjolnir is the only balanced amp on the market that isn't a bridged amp or a single ended amp who's output runs one leg and an invertor to create the other leg, cough BHA-1 cough :P  The Dynahi SuSy is another but its not technically on the market... yet.

And, one interesting little historical detail: the Sumo Andromeda III was a supersymmetry topology (not to take away from Pass, it predates his patent, nor am I looking for accolades, money, or anything else--good on him that he recognized it for what it was, and patented it.) It never crossed my mind that it was a unique topology, and patentable. I just did it because it used less parts than the Andromeda II dual-diff input arrangement.

But yes, Circlotrons and SuSy are really the only true balanced topologies out there, unless I'm mistaken.

Quote:
Originally Posted by Solude

You mean like everyone else? Mjolnir is the only balanced amp on the market that isn't a bridged amp or a single ended amp who's output runs one leg and an invertor to create the other leg, cough BHA-1 cough :P  The Dynahi SuSy is another but its not technically on the market... yet.

It is on the market.  I have the boards in my hand..  However, they're not the on board heat sink boards, they're the off board heat sink boards.

Let me rephrase, no one sells a completed, cased, to end users Dynahi SuSy ala HeadAmp... yet :P

Quote:
Originally Posted by Jason Stoddard

And, one interesting little historical detail: the Sumo Andromeda III was a supersymmetry topology (not to take away from Pass, it predates his patent, nor am I looking for accolades, money, or anything else--good on him that he recognized it for what it was, and patented it.) It never crossed my mind that it was a unique topology, and patentable. I just did it because it used less parts than the Andromeda II dual-diff input arrangement.

But yes, Circlotrons and SuSy are really the only true balanced topologies out there, unless I'm mistaken.

Good ol' Nelsen. I've heard so many interesting stories from the local ex/retired audio engineers around here.

Quote:
Originally Posted by Solude

You mean like everyone else? Mjolnir is the only balanced amp on the market that isn't a bridged amp or a single ended amp who's output runs one leg and an invertor to create the other leg, cough BHA-1 cough :P  The Dynahi SuSy is another but its not technically on the market... yet.

Good grief man!

You seem to think that Bryston is ( gasp!) cheating! Oh no! Who do they think they are!
And there design is not really balanced!

It has a balanced input and a balanced output.
The input rejects CM noise.
The output is balanced.
So what's the problem?

BTW, the Bryston uses a pair of inverters in the output stage, not one.
So the inverting and non-inverting outputs are identical.

So it is truly balanced input to output. Period.

Go ask a real analog signal processing designer.

This again.

Quote:

This again.

Ok!
I give up!
Enough!
They are lying!
The temerity!

I never said the BHA-1 wasn't balanced, it is.  You however did say others are cheating, and they aren't.

You are ok with Bryston running an inverting amplifier with gain into another at unity gain and then AC coupling.  That's cool.  All I've ever said is that the design is terrible and like other designs that never should have been green lit, I won't be supporting it.  My hope is Bryston notices the market is strong and worth an honest effort.

If it makes you feel better that list of amps is pretty long and most on the list cost more than the  Bryston :P

Should try listening. If it sounds good, it is.
Quote:
Originally Posted by Maxvla

Should try listening. If it sounds good, it is.

Don't confuse the issue with sound quality. What good is that?

Quote:
Originally Posted by Maxvla

Should try listening. If it sounds good, it is.

Which is the real irony in this whole debate. I own both the BHA-1 and the Mjolnir, and to my ears, they sound virtually identical.

Quote:
Originally Posted by Olias of Sunhillow

Which is the real irony in this whole debate. I own both the BHA-1 and the Mjolnir, and to my ears, they sound virtually identical.
Then sell the more expensive one or the one you don't like the looks of. No problem there.
Quote:
Originally Posted by Maxvla

Then sell the more expensive one or the one you don't like the looks of. No problem there.

Wait... sell one?

I probably will end up keeping the BHA-1 because it's more versatile (switchable inputs, SE and balanced outputs). We'll see.

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