kijanki
Responses from kijanki
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? luisma31, sorry, I got confused with initial post about TT problems. You keep saying "unplugged from pre side" but you probably mean that shield was disconnected, otherwise what are you listening to if nothing is connected to pre? I suspect that... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? luisma31, Unplugging connector? You probably mean - disconnecting shield? If you had no hum with shield connected at both ends, then why to change it? I would guess that disconnecting shield at the Phono side only left TT ungrounded with floati... | |
| Why do most phono preamps lack XLR input even thought cartridges are naturally balanced? luisma31, It might be true, but I've never heard of hum caused by high capacitance of the cable. I've heard of output oscillations and frequency roll-offs, but not hum. | |
| amp pre amp matching joes44, In the manual they stated that >60k/<100pF is for optimal results, but >20k/<1000pF is minimum requirement. I looked at the schematic and it appears that in addition to Mosfet output stage there is 5uF output capacitor. This ... | |
| 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... |