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If you are saying that all those parts in the studio harm the sound then I agree.
No, that's not what I'm saying at all. I have/heard plenty recordings that predate the "audiophile"/magic parts era, that are of outstanding fidelity. Others, more recent, that have traveled a million studio miles of commodity parts, being used a reference standards and for device test in my audio club.Go figure.cheers,AJ
Rogerfast amps lack good bass,what do you think?
Some would say that a tube Ampex studio machine is better sounding than a Studer A 80. You can include me in that. All the Patsy Cline, Buddy Holly, Dina Washington, Count Basie and others from that period were recorded through very simple control boards onto Ampex 300s and 350s. They sound mighty good to me.
Then I think we are in agreement? What about 70s stuff, like Cat Stevens Tea for the Tillerman? I wonder if audiophiles consider this (fairly popular/well known) as well recorded, pristine SQ?cheers,AJ
The balance between stability and good high frequency performance (not just slew rate but low distortion and good damping at high frequencies)is not an easy one to achieve. Although this is often touched upon in an EE education, if one is fortunate enough to find an analog design course, it is done in a strange mathematical way. While the professor and text will go on about phase shift and Nyquist conditions for stability they really don't get into how to measure it and how do deal with the consequences in a practical way. When i was at UVA in 1973 we touched on this. I had already designed a few SS amps in my teen years (for my band) and I was ready for them to pour the knowledge into me. Unfortunately none of them had built any SS amps. Forgive my digression: here is the problem we now face and will get worse. Little by little EE programs have become CE (computer engineering) programs and there are very few schools that still give a hoot about analog at all. This is one reason for me starting a school to teach these things, many of which I have had to learn on my own. As I have often said "Where is the next generation of Audio Engineers"
yeah learning the old fashion way is better,however internet is really one of the best schools around,don't you think?
I don't think so. There is a lot of misinformation on the net. How can someone learning sort out what is true and what is false and what is unsubstantiated opinion? The explanations given often disobey Ohm's or some other law. Most of the guys on the DIY sites are absolutely lost. There are some guys who know what is going on but not enough to monitor all the absolutely incorrect things I read. Not to name a name but there are several sites that show oscilloscope photos, graphs, schematics but often the explanation of what is going on is incorrect. The pictures they put up and what they say is so well done that one would think they are correct... but they are not.
Roger thanks,given what i know about electricity false/wrong ways won't work anyway,now if something works but differs from your perspective is not false? is just different!..
What do you think about the claims made for some modifications like tuning fuses. Can a fuse really be microphonic? If someone would tell me the microphonic output of the fuse I could work it out to how much that would influence the signal. In fact I did that on Audiogon Forum.
There are many amplifiers out there that have glaring errors yet do work.. but not very well. Most every designer wants to describe his ciruit and how it is better than whatever he is comparing it to. Someone can have a circuit that works but have an incorrect understanding about how it works.
Forget microphonic. I'd just like to see a single report on a fuse's performance that shows any error in distortion, noise or frequency response? You'd think the (audio) fuse companies would be all over this if they indeed had such evidence.
Pneumonic, do all amplifiers sound the same?Scotty
Thanks for a well stated question. I will make this as plain as possible. Lets look at what does affect distortion, noise or frequency response.Distortion is determined by the amplifying circuit and do a small extent the characteristics of the power supply. All circuits reject power supply noise and other effects to some extent. People love to talk about the importance of power supplies so lets look at that. To see if a fuse can affect the power supply we have to look at what things affect the voltage. The voltage of your power supply is regulated in most preamps and all digital sources because it has to be. Wide variations of line voltage are turned into very small variations by the regulator. A good regulator will reduce a 10 % line variation to less than 0.01 % or better. Some supplies reject input noise and variation by 100.000 to 1. Now while your regulator is dealing with these large variations in voltage input the fuse cannot add any significant variation to the line by comparison. Not even close. The regulator doesn't care what causes the variations on its input, it just deals with them.For a fuse to cause distortion or noise it would have to get past the transformer, filters and regulator. Each of those provides filtering and isolation from the power line. Frequency response is entirely determined by the circuit parameters and has nothing to do with the power supply at all. Perhaps this will help you see why this gets me rather riled up The maker and reviewers promoting these fuses are playing on the fact that the average audiophile does not know enough about electronics to decide for himself that the claims are ridiculous. The only reason for me to step into this quagmire is to inform the public that these fuses will cause damage in some situations and that the claims are just plain silly.
Indeed, Roger. But it's even simpler.If an EE were to describe his/her perfect audio reference it would very likely be a short, straight, piece of wire. Such a reference would be the perfect audio component for it would, when measured, exhibit no distortion, noise or frequency response error. Well, what is a fuse? it is a short, straight, piece of wire. Therefore, it can't have effect on sound.
