kijanki
Responses from kijanki
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? luisma31, If it is not grounded at either end, then capacitance to what? To electrically floating object? | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? Almost none. I ran unshielded tonearm cable in my home system for some years. You could crank up the volume and no hum or buzz from the cable, even if grasping it or moving it around. You do still have to ground the tone arm and it works best if t... | |
| Beryllium Tweets @yyzsantabarbara On their website they call it Zylon. It is proprietary composite material, so it might be hard to find out what it is. Engineering, most likely, will go that route, designing new materials with extreme stiffness at very low ma... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? Ralph, very interesting. As roberttdid said about differential filter "it seem obvious", but it escaped me completely, being stuck on "matching". | |
| Beryllium Tweets Steve Mowry says in the article "The Whole Truth About Beryllium Diaphragms: -"For a given geometry the first bending (break-up) frequency is proportional to the material Speed Of Sound, where the speed of sound within a material is defined as the... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? Roberttdid, I would compare single ended phono preamp input to, for instance, oscilloscope. When you short oscilloscope probe (tip to probe GND) there will be still some noise on the screen - bigger if you touch shorted inputs (in-spite of you "... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? That's not how it works. I think you are confusing something. For a 40db CMRR, you must have gain matching of gain matching between the two channels to +/- 0.5% (1% total), and you must have perfect transistor matching (which they never are).Look ... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? With a cartridge, you only have a ground connection on one end. Equal currents induced in the same direction on each wire (common mode) "induce" the same voltage and cancel each other out (it is a loop), at least at practical audio frequencies. Di... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? @lewm One advantage of true balanced is to remove reference to GND in order to get rid of wire to shield capacitance, but the same can be achieved with input transformer. The other is that even harmonics produced by both "legs" cancel, but some ... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? I can see one possible problem with true balanced operation. Gains of both amplifiers have to be exactly the same, otherwise common mode noise will get converted to normal mode signal. It requires some form of cross-feedback to keep gains exact... | |
| The meaning of “Remastered” Some "remastered" CDs sound cleaner and better, some worse. It is possible that they removed noise or digitized again with stable A/D clock. Artifacts of jittery A/D conversion cannot be removed ever. The only option is to digitize (remaster) a... | |
| Streaming: WiFi or wired?? Wired is twice as fast as wireless. That should be the deciding factor.No, it isn’t. What you need for typical CD is 1.4Mbit/s while WiFi delivers 54Mbit/s. Streaming services most of the time use lossy compression so it will never sound as good a... | |
| Streaming: WiFi or wired?? Also, with higher frequencies (at 5G) , your signal degrades quicker so distance becomes more of an issue. This is laws of physics and you just have to live with it.This and the fact that higher frequencies penetrate walls poorly prevent interfer... | |
| USB cables and Galvanic Isolation Yes, electrical noise can enter the DAC but is that really relevant if the DAC has a measure of -120 SINAD from the analog output?Even if this -120dB SINAD was specified for the USB input signal I'm pretty sure they did not use for this specificat... | |
| USB cables and Galvanic Isolation USB of newer DACs is asynchronous, meaning incoming data clock and D/A conversion clock are independent. Sound cannot be affected by the timing of the data, as it is with S/Pdif, but still can be affected by injected electrical noise (that affec... |