Recent content by mich41
-
M
Current Mode Amplifiers, how do they work?
It's not an issue when the driver has sufficient mechanical damping, like orthos do. If you look at frequency response plots in this "Transient and frequency response of the moving-coil loudspeaker current-drive and voltage-drive method" paper mentioned above (which deals with full-size...- mich41
- Post #17
- Forum: Sound Science
-
M
Hearing high pitch noise/bleep when moving mouse. Newly bought mini usb dac go vibe, how to eliminate noise?
You can temporarily eliminate the ground loop by disconnecting either the computer or the receiver from the ground - just use cable with a two pole AC plug instead of a three pole one. This way you can find out how much of your troubles is caused by the loop and how much isn't. If you are...- mich41
- Post #10
- Forum: Introductions, Help and Recommendations
-
M
Xonar Essence STX fake?
1% of their avg monthly salary per card. Decent compensation for 5 minutes of work IMO. And this isn't even the craziest thing that happens in China. You may be interested in pages 5-7 (20-22 in the pdf) of this US Senate report...- mich41
- Post #6
- Forum: Computer Audio
-
M
Xonar Essence STX fake?
It seems that somebody harvested stock opamps and replaced them with some incompatible ones. Also, I'm sure that my STX had few capacitors which were solid violet, but yours has none. The rest is probably genuine. Look for component lists or photos of other cards and compare.- mich41
- Post #4
- Forum: Computer Audio
-
M
Asus Xonar Essense STX Sound Card - Glitch with the right channel
This smells analog hardware damage. Do you have any other device to test optical input on this receiver? Also, check analog outs from the STX as it could be software after all.- mich41
- Post #3
- Forum: Computer Audio
-
M
Please recommend a computer psu
As for the power, HDDs use few watts each, motherboard components a dozen or two and Core i3 less than hundred - pretty much every PSU is enough to run this setup. SS-400FL has silentpcreview recommendation and these guys appear to know what they are doing. If your case has some ventilation in...- mich41
- Post #23
- Forum: Computer Audio
-
M
Help with USB jitter
Computer motherboard's "ground" is actually few millivolts above the real ground because there is a current flowing from motherboard "ground" traces to the real ground through cables which have some nonzero resistance. Apparently your DAC isn't designed to deal with being connected to two...- mich41
- Post #11
- Forum: Computer Audio
-
M
Weird siren noise from my amp
Be careful though, because you will probably get the same noisy surprise if you accidentally touch this amp's case with any other grounded object.- mich41
- Post #19
- Forum: Computer Audio
-
M
.WAV vs. FLAC
http://www.head-fi.org/t/650804/is-apple-lossless-real-lossless http://www.head-fi.org/t/650804/is-apple-lossless-real-lossless#post_9155654 :deadhorse:- mich41
- Post #40
- Forum: Sound Science
-
M
Impact of vibrations?
But your bricks only protect the equipment from vibrations and cosmic rays, while the mat prevents laser light from escaping through back side of the CD and carrying microdetails away. IMO true neutrality and independence from the harsh environmental conditions we all are exposed to can only be...- mich41
- Post #55
- Forum: Sound Science
-
M
Impact of vibrations?
Good one :) Does this thing seriously exist or is it just photoshop?- mich41
- Post #38
- Forum: Sound Science
-
M
Why do amps get hot?
"High end" headphone amplifiers are often overpowered and based on ancient designs and technologies which are horribly inefficient. Tubes need bias currents. Class A constantly produces heat at rate no lower than 1.41 of it's maximal output power. High output impedance wastes further power...- mich41
- Post #2
- Forum: Sound Science
-
M
Soundcard Question
New soundcards are flat enough most of the time. Any bass boost you may hear is likely caused by high output impedance (combined with highly reactive headphones) and could be reduces by external amp with low output impedance. Or maybe this "other source", whatever it is, has bass rolloff.- mich41
- Post #10
- Forum: Sound Science
-
M
Why do CDs sound better than loss less audio files?
Make a 700MB zip archive with anything. Burn it to 100 different CD-Rs. Get some MD5/SHA1/whatever checksumming software. Compare checksums. They will all be the same. Now throw these CDs on the floor and walk over them. Compare checksums of copies which will be still fully readable. They...- mich41
- Post #31
- Forum: Sound Science
-
M
Ive got a PhD and I can't get this straight.
Most stuff is released at 44kHz/l6bit because this format is used on CDs and because it's sufficient. Your OS converts all streams from all applications to one common format in order to mix them. Conversion of 16bit audio to 24bit is completely harmless. Sample rate conversion can be done in...- mich41
- Post #6
- Forum: Computer Audio