almarg
Responses from almarg
| Chasing 60 hz hum 11-09-11: BroimpWill study all these suggestions. Many thanks! I was getting the hum (just realized) with TV input selected only and will look at maybe a missing ground where the coax comes into the house.Ground loop issues involving connections b... | |
| Which is more accurate: digital or vinyl? 11-08-11: AlmargThe difference in db between the maximum possible value as represented digitally (65,535 as expressed in decimal form) and one "level" less than that ... is:20log(65535/65534) = 0.000132 dbA slight correction to this statement in m... | |
| Which is more accurate: digital or vinyl? Hi Sam,This Wikipedia article appears to address your questions much more knowledgeably than I could. Some excerpts:Because of the nature of sigma-delta converters, one cannot make a direct comparison between DSD and PCM. An approximation is possi... | |
| Which is more accurate: digital or vinyl? 16 bits specifies 65,536 levels, approximately 0.00146 decibel per level. Actually it shouldn't be looked at that way, because the CD medium uses linear encoding, while the db scale is logarithmic. For example, the difference in db between the max... | |
| I have a AC Regenerator. Get dedicated line too? A commonly stated rationale for upgraded power cords, which IMO is plausible, is the fact that the shielding they provide can prevent rfi (radio frequency interference) that may be generated by the power supply of an amplifier from escaping and co... | |
| Which is more accurate: digital or vinyl? 11-07-11: AtmasphereMy guess though is that when we can do 64-bit DACs on a regular basis that digital will start demonstrating the promise that its been showing.Thanks, Ralph. It seems to me, though, that it would be a pretty safe bet that that w... | |
| Balanced vs standard power For the record, I just noticed what appears to be a boo boo in the paper by Mr. Whitlock of Jensen Transformers. In figure 2, which I referred to earlier, the formulas for Vx and Vy should have CPS1 and CPS3 in their numerators, respectively, rath... | |
| Which is more accurate: digital or vinyl? Ralph, what do you feel is the more significant limiting factor for redbook, sample rate or bits per sample? Just curious.FWIW, my instinct has always been that sample rate is the more significant issue, at least for most music. In fact I've been ... | |
| Balanced vs standard power Perhaps Jim or Al can comment on the issue of UL/CSA standards and shunting/grounding as compared to IEC. I gotta step back and listen when those guys are talking.Thanks for the compliment, NG, but those kinds of standards are not among my areas o... | |
| Balanced vs standard power Hi Dan,I read through the Equitech paper, and it strikes me as excellent. However, it also strikes me as not inconsistent with the comments on balanced power in the Jensen paper, which is to say that there would probably be significant hum reducti... | |
| Balanced vs standard power Just having one of the other amps plugged in but not turned on or connected in any other way is enough to cause the hum. Wow! That's different! When the amp that is not connected to anything except power is turned on, does the hum get better, wors... | |
| Balanced vs standard power 11-06-11: Dan_edI think I get it, but see what you guys think about this. My two amps hum because they reference ground at a slightly different potential, and that creates a small current between them when they are on the same circuit. The balance... | |
| Which is more accurate: digital or vinyl? 11-04-11: Hevac1When recording say a violin, is the first sample taken at the start of a note played and does it also sample at the very end of the note regardless of the samples in between? If it does not then how can digital play back components... | |
| will a low 60Hz harmonic hum wear out my speakers? My worry was not about the electronics and the amount of power being sucked in, but actually (and likely simplistically) about mechanical wearing off of the driver membranes, given the constant movement to make that noise. Yes, that was understood... | |
| will a low 60Hz harmonic hum wear out my speakers? Assessing the level of hum or buzz when the amp inputs are disconnected from the preamp will only be meaningful if it is done with shorting plugs (or something equivalent) connected to the amp inputs. Without shorting plugs the amp may simply be p... |