almarg
Responses from almarg
| 4 ohm taps on an 8 ohm speaker Does it make sense that because the amp's output impedance starts relatively low on the 8 ohm tap and doesn't have a lot of room to go lower on the other taps, the sound quality would vary less from tap to tap relative to higher output impedance a... | |
| 4 ohm taps on an 8 ohm speaker Tmcclintock, thanks for including the links in your post. My suspicion is that the main reason you have found the 8 ohm tap to provide the best results is simply that it is the tap that is the closest match to the speaker's impedance, at all frequ... | |
| Phono rig capacitance IMPORTANT P.S: I just noticed that in the second model the units of the transformer coil inductances appear to be Henries, while in the first model they appear to be microHenries (with the numerical digits being the same in the two models)!!!That ... | |
| Phono rig capacitance Looks like you've made some progress. Good!I'm surprised that relocating the connections of the cable capacitance elements in the model (together with the minor changes you've made in some of the capacitance values) had such a profound impact on t... | |
| Is there a minimum length for power cords? Dover, with respect to your comment I don't think a 2 meter or any other precise point of demarcation between what will be seen by the power supply as a stub vs. as part of the loop can be defined. It depends on the specific frequency component of... | |
| Phono rig capacitance P.S. to my previous post: Regarding "leakage inductance," see this Wikipedia writeup.Regards,-- Al | |
| Phono rig capacitance ... Can you please give some input on the basic structure.... I tried to follow Jcarr's model, but in the end I am still not sure why when modeling a wire connecting devices you would model the RCL in series or in parallel, and in what order you p... | |
| Is there a minimum length for power cords? ... any length shorter than 1.8 meters (5.9 feet)will begin to degrade the effectiveness of the shielding and filtering capabilities; regardless of who is the manufacturer.But on the other hand the resistance and inductance of the cord will increa... | |
| What happened to Jfox 07-04-14: JudyazbluesWho is John Galt?Wow! Definitely the best literary reference of the day. I had to look this one up.Best regards,-- Al | |
| Phono rig capacitance Dfel, as I indicated earlier in the thread I can't speak too knowledgeably about modeling of SUTs. But FWIW the following thoughts occur to me:1)Depending on how the simulation program you are using works, I think you might have to model the SUT a... | |
| Soulution amp and tubed preamp Hi Charles,As you know the CSLS has transformer coupled outputs, which I suspect maintain a fairly constant output impedance across the audible frequency range. I'm pretty certain that the ARC Ref amps have capacitively coupled outputs, which caus... | |
| Soulution amp and tubed preamp You didn't mention the specific ARC preamp model, but my strong suspicion is that it would NOT be a favorable match. Typically the output impedance of the ARC preamps having 600 ohm specifications rises to significantly higher values than that at ... | |
| Mcintosh mc 225 vs Marantz model 2's RetroTodd, welcome to Audiogon!I haven't ever heard an MC-225 or an 8B. But I know that the 7591 power tube used in the MC-225 is a fine tube, and I'd imagine that it will prove to be quite a nice sounding amp, especially with the substitutions yo... | |
| 4 ohm taps on an 8 ohm speaker Bruce (Bifwynne), looks like you and I and Anthony (Clio09) were all responding at the same time. Great minds think alike! The one very slight qualification I would make to your post is that the reference to higher frequencies being less augmented... | |
| 4 ohm taps on an 8 ohm speaker 07-03-14: Jmcgrogan2I have been told that the lower ohm taps will drive more current, whereas the higher ohm taps will drive more voltage. I don't know if there is any truth to that though. Maybe our local electrical hero Al (Almarg) will drop in ... |