almarg
Responses from almarg
| OTL Tube Amp for Maggie 3.6? 03-25-11: AhendlerI know that the Zeros are an autotransformer but isn't the big reason of the sound of otl's is because they do not have an output transformer. Now we stick one back into the equation. Seems counter intuitive.Yes, it does seem cou... | |
| Does phono stage noise drive you crazy too? The 53db. A weighted noise figure was provided by the factoryAssuming it is based on one of the commonly used test conditions and reference levels, a 53db A-weighted s/n ratio is in a ballpark that I would expect to result in the audible hiss leve... | |
| Does phono stage noise drive you crazy too? 53db. A weighted noise it turns outWhat does this mean? Are you saying that at the listening position you measure 53db A-weighted noise with an spl meter, with the volume control at a setting that you would use for listening? If so, that would def... | |
| Parallel Capacitors-Theoretical Question 03-22-11: PaulsaxShouldn't the tolerances for cap add in quadrature? (0.1^2 + 0.1^2)^0.5 = 0.14 or 14%?Hi Paul, You ask a good question, as usual.If the two tolerances are the same in percentage terms, then as I stated the tolerance of the paralle... | |
| perfect speakers for atmasphere amp and preamp Probably many or most of the models mentioned in this thread about high efficiency speakers, although the power capability of your MA1's may be overkill for some of them.Coincident and Devore would undoubtedly be good choices to consider, as would... | |
| How to check an IC? Yes, 3 to 4 ohms sounds too high, assuming that the length of the cable is not extremely long (for example, 50 feet!).If you are confident that you did the measurement properly, and that before and after you made the measurement you checked that t... | |
| How to check an IC? Actually, the R x 1 scale on a Radio Shack analog multimeter is undoubtedly not a 1 ohm scale. It simply means that the number indicated on the dial scale by the pointer should be multiplied by 1, as opposed to being multiplied by 10 if the R x 10... | |
| Vinyl lovers I must be crazy Are you sure that the problem is not simply that your present high quality system is revealing deficiencies in the recordings that your 1970's system did not reveal? In which case vinyl vs. cd has nothing to do with it. Just a thought. Regards,-- Al | |
| How does music "move" down a wire? Lplayer, thanks for providing the link to that paper, which is excellent IMO. When I wrote my earlier comments, I hadn't thought of the fact that propagation velocity will slow at low frequencies. However, as can be seen in Figure 2 of the paper, ... | |
| Cables – Speaker as well as interconnects – ugghh Rbschauman, yes, your interpretation of my comments is essentially correct. IMO many cable-related comments that you may see are flawed in three ways:1)They fail to take into account that cable effects are significantly dependent, and perhaps most... | |
| Cables – Speaker as well as interconnects – ugghh Hi Lynne,No, as far as I am aware all speakers will exhibit measurable capacitance at some frequencies. Speaker impedance becomes more benign to the extent that:1)Nominal impedance is higher.2)The impedance varies less as a function of frequency.3... | |
| Parallel Capacitors-Theoretical Question Given that the paralleled caps would presumably be similar in design, I'm not sure that using dissimilar values would make any difference compared to using values that are close to each other. But my instinct would be to use values that are as clo... | |
| Cables – Speaker as well as interconnects – ugghh The Sandringham's have an 8 ohm nominal impedance, and also apparently have a benign impedance vs. frequency curve. That will reduce their sensitivity to cable differences, compared to speakers having lower nominal impedance and/or a more difficul... | |
| Why Don't We See More High Current Electronics? Thanks Kirk. But note that Irv specified a 40Hz impedance of 4 ohms, so I believe that my indication of 50W (rms of course) at 40Hz was correct.Also, I think that when you referred to 40V and 20V "peak-to-peak," you meant to say "peak." The 100W f... | |
| Why Don't We See More High Current Electronics? Irv, thank you for offering the words of reconciliation to Grant.03-16-11: IrvrobinsonFor a good voltage-source amp with 100w into 8ohms, if the speaker has a peak impedance of 16 ohms into 4KHz the amp will clip at 50w, and if the lowest impedanc... |