eldartford
Responses from eldartford
| Weather-induced amp performance variation Don't forget that the weather can play havoc with your sense of hearing. | |
| Amplifier Speed Onhwy61 and Sean...Although this "transit" or "propagation" time is not quoted in specs, and I for one have not measured it (although it would be easy to do) it cannot amount to more than a few degrees of phase shift for a 20 KHz signal, or else g... | |
| Will this isolation transformer limit power draw? sean...60 Hz ac sinewave input power is at zero volts 120 times per second, and below rail voltage most of the time. (That's why we found a square wave power input was better).Outboard location of some PS capacitance is OK. After all, some designs... | |
| Will this isolation transformer limit power draw? Sean...Using an audio program instead of 60 Hz for power is obviously an extreme case. Isn't it true that the diodes of the power supply only conduct during time intervals when the input 60 Hz voltage is greater than the rail voltage. Most of the ... | |
| Will this isolation transformer limit power draw? sean...Thanks for the straightforward answers. I could respond with follow up questions, but I doubt that we would ever agree completely. My concern (probably too strong a word) is that many audiophiles spend a lot of money on things that have no ... | |
| Amplifier Speed Slew rate (or rise time) is of no consequence for the LF audio amp in a biamp setup because the LF signal from the crossover has no steep wavefronts to be followed. | |
| Amplifier Speed In order for global feedback to work at all, propagation time through an amp must be a few degrees of phase angle for a 20 KHz signal. I suspect that there is little difference between amps.Phase shift in the crossover would be more significant. | |
| Driver efficiency vs. overall speaker efficiency Trelja...What if the "box" includes a passive radiator? Of course the PR draws its power from the driver, but I think it does the electrical-to-acoustic conversion more efficiently (because cone excurion is less) than if the audio all came from th... | |
| Will this isolation transformer limit power draw? Lak...Some questions...1. If a transformer removes "grunge" (that must be some technical term that I am unfamiliar with) why doesn't the transformer that is already in the audio equipment do the job?2. Why doesn't power supply capacitance do the j... | |
| Will this isolation transformer limit power draw? The transformer is probably OK for any reasonable home use of the amp, but why the heck are you using the transformer? | |
| House Amperage vs Stereo Amperage sean...About circuit breakers...when a tree next to my house was struck by lightning almost every fuse in the house blew, but not a single breaker opened. (Give me fuses any day).About rail voltage sag...if the audio signal peaks at 35 volts this ... | |
| House Amperage vs Stereo Amperage Chipman...A good observation. I suppose one could have an amp with ten volt rail voltages that could put out 150 amps, which would be 1500 watts. It would probably work better as a welding machine than an audio amp. | |
| Driver efficiency vs. overall speaker efficiency Jeffreybehr....My points are:1. The term "Efficiency" is just confusing. I don't see it quoted by manufacturers.2. You gave the answer, but did not "do the math" so that others could understand where you are coming from. I am not disagreeing with ... | |
| Driver efficiency vs. overall speaker efficiency "Efficiency"???...The only thing I see quoted in specs is SPL in units of dB at 1 meter for 2.83 volts. This is 1 watt for an 8 ohm load.Power = Volts squared divided by ohms.(2.83 * 2.83) / 8For 4 ohms it's 2 watts. | |
| What is the best phono preamp you have heard? I have an ancient outboard phono preamp...PS Audio II, which dates from the early 1980s, and was the original product of the firm. It consists of a single top quality circuit board, with top quality parts, inside an elcheapo folded aluminum shell ... |