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Schiit Lyr Shipping! Impressions?
Nov 21, 2011 at 4:54 PM Post #2,056 of 2,392
 
Does the unit have a switching power supply?
 
If yes, get use to the buzzing, switchers are generally lighter and less expensive but the noise is a problem.
 
We actually added noise limits on switchers and fans we used for industrial telecommunications equipment because the noise would drive our customers crazy. Especially when you have tens of units in the same room.
 
If its a switcher and its really loud, call the factory they will probably do something for you.
 
Quote:
knowhatimean said:
Just out of curiousity, did you place any "feet" of any type on the bottom of your Lyr or is the chasis sitting directly on shelf or rack you've placed it on ? Transformers will buzz if placed on a solid surface, raising the amp off of the surface allows the vibration to dissapate enough that you should'nt hear it from a few feet.
 
 
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Nov 21, 2011 at 5:30 PM Post #2,057 of 2,392

Could be a shielding problem with the cable, the DAC or the amp. The metal cases on the DAC and AMP should provide adequate shielding if the units are properly grounded. It's possible that the USB cable is transmitting to the cables connecting the DAC and AMP or even to your headphone cables. I forget the exact specs for C1 conditioned phone lines to prevent induced noise, but I think it is 6 twists per foot. This is why you see after market braided headphone cables. Always get shielded cables. I recently added a Monster Power Conditioner to my home TV and Audio, the Picture and the sound improved on everything. Noticeably better. Unfortunately, to get a real conditioner that stabilizes the power to a fixed spec costs $2000. I'm not ready to cross that bridge yet.
 
You could also get some 12VDC car batteries (something besides acid if indoors) and run them in parallel making one big 12VDC battery; then put a 12V to 120 VAC converter for a car on the other end of the circuit. You would also need a charger that could keep up with the draw of your systems. This is basically how Telephone company central offices are set up with -48VDC batteries. Check with an engineer before you build this a DYI project so you don't burn the house down. This could be as cheap as $300, plus run it into the Monster system before distributing it to you beloved stereo and TV. Pyle and others make the DC to AC converters (some regulators are probably better than others) and a low amp car battery charger could probably drive the AC to DC for you. This could probably be housed in the garage and an outlet set up indoors to feed the Power Center.
 
The monster power center shows the voltage, which bounces between 117 and 122 VAC over the course of 20 minutes as the load changes in the neighborhood. My local power loop is the latest and greatest and the same loop as City Hall (which is the power company in my town) so this is a good as its gets on City Power.
 
I have a friend that designs ICs, I'm guessing he could design this fairly quickly on a napkin.
 
 
Just finished e-mail exchange with engineering friend, maybe we will make a project out of this.
Engineer says......................
"Well the charger - battery - inverter structure has been used before.
Some non-interruptable power supplies used this architecture.
The inverter is probably the weak link. The sine wave may look terrible
and you might be surprised that the Voltage varies more than your line
under varying loads. So, yes you could do it, but you need to be careful about
about the inverter"
 
 

[size=1.7em] $ 222 Monster HTS 3600 MKII 10-Outlet Power Center with Stage 3 Clean Power[/size]

 
Quote:
shaunybaby said:
on page 35 i was talking about how there was a static sound coming from my amp and by leaving it on for about an hour the sound would then just disappear, last night i was moving around in my chair while listening to music and while doing so the static increased I found that when I moved the usb cable in my dac static would be created (dac is Nuforce hdp), i thought other people might be having the same problem.
 
looks like buying a bifrost is an easy solution. 
normal_smile .gif
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Nov 29, 2011 at 1:11 AM Post #2,061 of 2,392
Quote:
bubo said:
Does the unit have a switching power supply?
 
If yes, get use to the buzzing, switchers are generally lighter and less expensive but the noise is a problem.
Click to expand...

 
I recently had a look at the inside of my Lyr and it seemed to have an R-core transformer. Not sure what that means about the power supply though.
 
Nov 29, 2011 at 2:22 AM Post #2,062 of 2,392
I seriously doubt that the Lyr power supply is a switcher due to it's topology.
Large transformers and big filter capacitors (as in the Lyr) are not the hallmarks of a switching psu.
Besides, it is bad form from a design standpoint to include a switcher in the same case as the amp.
As you know, they can be very "noisy" due to their internal high frequency voltage conversion.
Not what one desires inside of an audio product.
(click pic to enlarge)
 

 
Dec 1, 2011 at 1:04 AM Post #2,063 of 2,392
Just dropping by to say Hi. Even though this is posted on the Lyr tube roll thread I will re-post it here. I guess ppl should like photos.
 


 

 
I got the pair of Valvo CCa for $80. If you see this kind of deal don't miss it. I personally think that the stock tubes is good sounding, but it doesn't sound as good as some of the tubes made in the 60s. I am at the height of tube rolling for the Lyr, some of the tubes will be sold in a few weeks' time.
 
 
 
Dec 1, 2011 at 1:33 AM Post #2,064 of 2,392
LCD-3? wowowowow I envy you :)
 
How does lyr sounds with LCD-3? any tube changed from lcd2 to lcd3, in case you had lcd2?
 
Dec 1, 2011 at 1:45 AM Post #2,065 of 2,392


Quote:
obazavil said:
LCD-3? wowowowow I envy you :)
 
How does lyr sounds with LCD-3? any tube changed from lcd2 to lcd3, in case you had lcd2?
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And I envy those with Stax...I have not heard much of any high end headphones, but I think the Lyr drives the LCD-3 fine. The sound is quite dependent on the tubes you put in there. Out of all the tubes I have, a few that I really like is the Telefunken E88CC (everything is good except slightly brighter sounding), Amperex 7308 (typical Amperex house sound, but better than the younger brother, 6922), Valvo E88CC (very middle ground sound, very pleasant), Siemens E188CC (this one is good, slight colder than Amperex, but a tad warmer than Telefunken, impressive imaging), Mullard CV 2493 (as good as the Siemens, slightly soft at the lows and highs, very smooth, slightly more forward mid than the Siemens). Both Mullard n Siemens have one tube that died, so I either hv to sell them or get one new tube...
 
And I am currently listening to Valvo CCa, I think for me they sound the best, if not, they are certainly up there. Like the Siemens n Telefunken, they have the uncanny ability to portray the micro details really well, for example you can hear the lip movements of the singer at times.
 
I do not have the LCD-2, jumped straight to the 3.
 
 
Dec 19, 2011 at 11:53 PM Post #2,069 of 2,392
I was tempted to pick up a Bifrost + Lyr combo and was wondering if anyone has found the sound quality to be excellent with the HD 800s. 
 
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