almarg
Responses from almarg
| A Question on Speaker Driver Efficiency ... not 20 X log 10(P/Po) db as you [Erik] suggested above. CJ1965, Erik did not say that or suggest that. He said 20 x the logarithm of the ratio of applied voltage, not 20 x the logarithm of the ratio of power. If half the voltage is applied pow... | |
| Switching a single set of speakers between two amps The thing to be careful about, as you may realize, is that most tube amps should not be operated unloaded, at least when they are processing a signal. So you would have to be sure that the tube amp is always turned off when the other amp is bein... | |
| A Question on Speaker Driver Efficiency Thanks, Kijanki. Here's another interesting quote, this one from the thread Tim referred to above: CJ1965 4-19-2018For some people, "results" means using antiquated 80 year old technology that is highly vulnerable to changes in performance depen... | |
| A Question on Speaker Driver Efficiency As quoted by CJ1965:" So if you have a 97 db 1 watt/1 meter 8 ohm driver, two in series will have the same efficiency (since each is absorbing 1/2 watt) while the sensitivity is 94 db " - atmashpere [sic] Given that efficiency is defined as the SP... | |
| A Question on Speaker Driver Efficiency CJ1965 4-18-2018... the erroneous statement atmasphere made and you [Almarg] supported which suggested two 8 ohm speakers in series would each dissipate 1/2 watt with a total of 2.83V applied as input. Neither I nor Ralph (Atmasphere) said ... | |
| A Question on Speaker Driver Efficiency CJ1965, re your last post that was directed to me, your math is of course correct. However, once again, if efficiency is defined as the SPL produced at 1 meter in response to an input of 1 watt, if that 1 watt is provided to two speakers connected... | |
| A Question on Speaker Driver Efficiency CJ1965 4-17-2018 "So if you have a 97 db 1 watt/1 meter 8 ohm driver, two in series will have the same efficiency (since each is absorbing 1/2 watt) while the sensitivity is 94 db. If you put the two drivers in parallel for a 4 ohm load, the effic... | |
| A Question on Speaker Driver Efficiency CJ1965, I believe that what your analysis about phase differences between voltage and current in reactive circuit elements may not be taking into account is that the motion of a dynamic driver results from the current it is conducting, rather than... | |
| A Question on Speaker Driver Efficiency CJ1965 4-17-2018 If you [Atmasphere] had any experience designing or building amplifiers, you’d know that every energy storing element within a circuit contributes to phase lead or lag between voltage and current. Loudspeaker coils are no differen... | |
| Ugraditus is calling....again. Phono stage? I also have an SME series 3 but that maybe too light? @analogluvr, on paper a reasonable case could be made both for and against that combination, IMO, so it may very well be worth trying the ART9 in the SME III.A case that could be made for it wo... | |
| Ugraditus is calling....again. Phono stage? @analogluvr & @uberwaltz,Like many others here I’ve been delighted with the ART9. Among its many excellent qualities I would say that the one which stands out the most is simply its neutrality, meaning that it doesn’t seem to overemphasize or ... | |
| Seeking arm suggestions for a Grace F9R FWIW, for several years I used an F9 with the Soundsmith "Ruby Cantilever/Nude Contact Line Diamond" stylus assembly (which apparently is similar to the OCL aside from the stylus profile) on my Magnepan Unitrac I arm. I was very pleased with the c... | |
| Just Got My Oppo 205! Chayro, I have no experience with Oppo products, but assuming you are using the 205 with the Viva Solista integrated amp listed in your system description I’m wondering if the fact that you have to use the unbalanced outputs of the 205 may be a fa... | |
| Ugraditus is calling....again. Phono stage? @analogluvr, thank you kindly for the very nice words.BTW, your comments about the Herron phono stage in past threads were prominent among those which led me to become yet another very happy owner of a VTPH-2 a couple of years ago. Thanks for tha... | |
| Changes that made a difference (in order of effect). In the past three years:1)Replaced my Classe CP-60 preamp with a DEQX HDP-5, which in addition to serving as a preamp provides numerous signal processing functions including room correction, speaker time alignment, DAC functionality, A/D converte... |