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New Schiit Lyr: Hybrid 6W Headphone Amp. Yes. Six. Watts. RMS. - Page 21

post #301 of 823

I want a four on the floor stick shift on my Lyr.

Hmmmm, now there is a custom niche market someone could fulfill.....

First I've gotta find my black rattle can. <<scratches head>>

post #302 of 823
A "T shifter" would make a pretty cool headphone stand with the gear indicator base. :-)

 

post #303 of 823

or just replace the switch with a stick switch if any exist and create some kind of key hole which a key locks it into the on position?

 

That would be a rather epic design albeit something I would never buy.

post #304 of 823

If my source has a volume pot, I'll just remove the Lyr's volume pot, just make it an amplifier. But that void the warranty ksc75smile.gif

post #305 of 823
Quote:
Originally Posted by Skylab View Post



Quote:
Originally Posted by wuwhere View Post

Also most volume pots are log tapered, meaning the resistance is applied logarithmically not linear.



Indeed, but this will be an interesting thing to learn about the Lyr - if one does try to use it with high efficiency headphones like Grados, will one be restricted to such a small portion of the volume control's range that it becomes difficult to use?  I'm not saying this will be the case, but it could be.  Only time will tell. 

 

But of course the real purpose if this amp is for those much harder to drive cans.  And for that, if it delivers the way the first two Schiit amps have, it will be a godsend.

 

 

Quote:
Originally Posted by wuwhere View Post

If my source has a volume pot, I'll just remove the Lyr's volume pot, just make it an amplifier. But that void the warranty ksc75smile.gif


It is a good suggestion to use a source with volume pot, to use as a preamp if needed.  Many of my sources have a volume control, including my uDAC-2 and HDP, Apogee mini-DAC, and PS Audio Prefectwave DAC.

post #306 of 823


Firstly, a mistake of mine I need to clarify (sorry Jason):

Originally Posted by gogogasgas View Post
Valves/tubes. Bummer (for me) the unit isn't a super-duper version of the solid state Asgard - now that could be a giant killer. Jason said something like it was hard to get the Lyr's current to a sufficient level to maintain pure class 'A' using tubes. I repeat, an ass-kicking version of the Asgard would do nicely for we solid-state folk. Perhaps that too is "in the works".

 

 Dumbo me didn't read the 'Frequently asked questions' section relating to the Lyr on the Schiit website, which states:

 

"Sorry, gotta use more engineering-speak here. We chose to use tubes for voltage gain because they allow us to use a single stage to deliver huge voltage swing at low distortion without feedback. The JFETs we use in Asgard would go “pop” in a big hurry if we used them here. Yeah, we tried high-voltage BJTs, but they didn’t sound as good. Yeah, we’re playing with depletion-mode MOSFETs, but they’re noisy. Sorry guys, in this case, tubes are best for the design, so that’s what we went with. Also, you can change ‘em up...."

 

Originally Posted by Skylab View Post

Indeed, but this will be an interesting thing to learn about the Lyr - if one does try to use it with high efficiency headphones like Grados, will one be restricted to such a small portion of the volume control's range that it becomes difficult to use?  I'm not saying this will be the case, but it could be.  Only time will tell. 

But of course the real purpose if this amp is for those much harder to drive cans.  And for that, if it delivers the way the first two Schiit amps have, it will be a godsend.

 

I want to get front-end pieces of the audio chain together before I buy my next headphones (likely candidate: the LCD-2s). So, in the meantime, I will be using my trusty Senn 650s. I too wonder if I would have much adjustment on the volume pot when using my 650 'phones.

 

Jason, can you explain the following statement, which I lifted from the Schiit website. Are the opamps are in the signal path?

 

"Lyr uses an op-amp for its DC servo, so we can be DC-coupled at input and output. For a DC servo, op-amps are fine. Theta used ‘em. Sumo used ‘em. Swapping it for some super-expensive part won’t change the sound–the servo is essentially out of the circuit by 1 Hz."

 

Also, like others, I would like a balanced version of this amp. I wouldn't like to pays me's money and find out a balanced version was due for release in six months time....

post #307 of 823
Thread Starter 

Hey all, sorry I've been scarce. To answer some questions:

 

1. Lyr with Grados? Yeah, you can--and you'll have good control on the volume pot, though you will be staying way down on the lower half of it. We're using a real, audio-taper pot with excellent matching between sections. However, I gotta say--Asgard with Grados is one of the most insanely synergistic matches we've found. If I had only our Grados, I'd be buying an Asgard, period.

 

2. Lyr with HD650? Sure, you bet! And you'll have much better range on the volume pot than with Grados. It's a nice match that really wakes up the HD650s.

 

3. DC servos? We could have a discussion for a week about the pros and cons of DC servos vs coupling caps vs twiddling pots, are they technically in the signal path or not (being pedantic, we can say *everything* is in the signal path, including power supply, PC board, wiring, chassis, etc, etc.) Bottom line: the DC servo is more acoustically innocuous than any coupling cap we've heard. 

 

4. Balanced version of this amp? Nope. Balanced Asgard? Nope. Balanced in the future? Yep. When? I don't know. Will it cost a lot more than this amp? You better believe it.

post #308 of 823

I think by a logarithmic scale it means log(y) = x

 

where y is the volume, and x is the distance you turn on the knob,

 

this means that dy/dx (i.e. the change in volume per unit of distance turned on the knob) is dy/d(logy)*d(logy)/dx = y

 

or dy/y= dx

 

the proportional change in volume is equal to the change in the distance turned on the knob (e.g. every 1cm turned on the knob increases volume by 10%)

 

 

 

if you plot a logarithmic scale in the x-y plane, it should look like y = e^x

 

 

 

Quote:
Originally Posted by revolink24 View Post


 

Quote:
Originally Posted by kwkarth View Post



 


Volume controls are logarithmic in their progression through their resistance range.  The first 30 % of rotation give you very fine control over very minute changes in volume and power.  The next thirty percent of rotation apply a little more power so that at the end of the first sixty percent of rotation you're accessing maybe 20% of the amp's power on tap.  Remember, the output volume is still wholly dependent upon the input signal volume.  Quiet is still quiet whether you're at 0 volume or 60% volume.  The last 30% of the rotation of the volume knob gives access to the rest of the amplifier power.  You basically would never need to go there.



Huh? Last time I checked audio pots were logarithmic because that was how human interpretation of decibels worked, and also that in a logarithmic function, the function varies more at the start, not less.Logarithmic potentiometers in audio are used to give the perception of linear volume.500
post #309 of 823
Quote:
Originally Posted by imademymark View Post

I think by a logarithmic scale it means log(y) = x

 

where y is the volume, and x is the distance you turn on the knob,

 

this means that dy/dx (i.e. the change in volume per unit of distance turned on the knob) is dy/d(logy)*d(logy)/dx = y

 

or dy/y= dx

 

the proportional change in volume is equal to the change in the distance turned on the knob (e.g. every 1cm turned on the knob increases volume by 10%)

 

 

 

if you plot a logarithmic scale in the x-y plane, it should look like y = e^x

 

 

 

Quote:
Originally Posted by revolink24 View Post


 

Quote:
Originally Posted by kwkarth View Post



 


Volume controls are logarithmic in their progression through their resistance range.  The first 30 % of rotation give you very fine control over very minute changes in volume and power.  The next thirty percent of rotation apply a little more power so that at the end of the first sixty percent of rotation you're accessing maybe 20% of the amp's power on tap.  Remember, the output volume is still wholly dependent upon the input signal volume.  Quiet is still quiet whether you're at 0 volume or 60% volume.  The last 30% of the rotation of the volume knob gives access to the rest of the amplifier power.  You basically would never need to go there.



Huh? Last time I checked audio pots were logarithmic because that was how human interpretation of decibels worked, and also that in a logarithmic function, the function varies more at the start, not less.Logarithmic potentiometers in audio are used to give the perception of linear volume




That's essentially what I mean't. All I meant to say with my post was that the pot was logarithmic exactly so the proportional change in volume was equal to the distance turned. It seemed like kwkarth was implying that because it was logarithmic, the perceived volume change was much lower in the lower 10% of the pot because of it being logarithmic.

Feel free to correct me if I'm mistaken.
post #310 of 823

Jason, thanks for the new post. Although I know this thread is about the upcoming Lyr, I'd like to put in a special order for a new Schiit headphone called the 'Ström' (Nordic for swiftly flowing water)

 

The 'Ström' has much of the design of the Lyr, perhaps with an all solid state solution to that valve/tube set-up and:

 

1. Balanced and single-ended inputs and outputs

2. A pre-amp with multiple input selection

3. A two box set-up, using two of your existing silver boxes, with the bottom box housing two separate, over-engineered power supplys

4. Be a completely 'dual mono' design

5. And something essential to proper listening pleasure, two analog VU meters! Woof!

post #311 of 823
Quote:
Originally Posted by gogogasgas View Post

Jason, thanks for the new post. Although I know this thread is about the upcoming Lyr, I'd like to put in a special order for a new Schiit headphone called the 'Ström' (Nordic for swiftly flowing water)

 

The 'Ström' has much of the design of the Lyr, perhaps with an all solid state solution to that valve/tube set-up and:

 

1. Balanced and single-ended inputs and outputs

2. A pre-amp with multiple input selection

3. A two box set-up, using two of your existing silver boxes, with the bottom box housing two separate, over-engineered power supplys

4. Be a completely 'dual mono' design

5. And something essential to proper listening pleasure, two analog VU meters! Woof!


Somehow I doubt we'll ever see VU meters in Schiit gear. Leave that to Mac.
post #312 of 823

 

Originally Posted by revolink24 View Post

Somehow I doubt we'll ever see VU meters in Schiit gear. Leave that to Mac.

So how then can you tell that the 'Ström' is going to '11'?

post #313 of 823
Quote:
Originally Posted by gogogasgas View Post

 

Originally Posted by revolink24 View Post

Somehow I doubt we'll ever see VU meters in Schiit gear. Leave that to Mac.

So how then can you tell that the 'Ström' is going to '11'?


When the VU meter goes to 11, you have a problem.
post #314 of 823

Had to break my New Years' resolution, no more buying schiit!!

 

Looking forward to it; 

Hope it works nicely with the Audio-gd Compass dac, granted, the Compass is beginning to show it's age.

post #315 of 823
Thread Starter 

 

Quote:
Originally Posted by gogogasgas View Post

Jason, thanks for the new post. Although I know this thread is about the upcoming Lyr, I'd like to put in a special order for a new Schiit headphone called the 'Ström' (Nordic for swiftly flowing water)

 

The 'Ström' has much of the design of the Lyr, perhaps with an all solid state solution to that valve/tube set-up and:

 

1. Balanced and single-ended inputs and outputs

2. A pre-amp with multiple input selection

3. A two box set-up, using two of your existing silver boxes, with the bottom box housing two separate, over-engineered power supplys

4. Be a completely 'dual mono' design

5. And something essential to proper listening pleasure, two analog VU meters! Woof!


Please send a deposit for $10,000,000, and we'll let you know when it's ready. Be patient. Very, very patient.

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