New or Old DAC


I currently have an older Theta front end. Data ll transport & Chroma HDCD. I like it, even though it is old and discontinued. I would like to update my DAC first , I am looking for a Theta Pro Gen va. I know the sound of the older Theta stuff and like it. But, are there any newer DAC's out there in that $1K (used) price range that can really give an equal or better performance than the Pro Gen Va? Do the newer anti jitter (re-clocking) DACS fall into that price range?

thanks, mike
128x128mikedaniels

Showing 17 responses by pettyofficer

Jmcgrogan2- I am still awaiting an answer! How is A.C. Current that has been Rectified to D.C. Current, and is Voltage Regulated, and now supplies Analog as well as Digital Stages, Analog Based? Direct Current is Direct Current regardless if it is supplying Analog or Digital Stages, perhaps at a different Voltage, but it is still Direct Current! What is your basis of, "Analog Based" in Direct Current?
Jmcgrogan2:

"Remember- no one puts Tubes, fancy caps or resistors in the Digital to Analog Converter, these Premium parts go in the Analog Output Stage."

Sorry to disagree, my Space Tech Lab DA-64XT DAC utilizes an STR-104 Tube Rectifier. This Rectifier does have two very, very large Tubes that supply power to all of the components within the DAC.
Digital or Digital to Analog Conversion Stages run off of what power source, Pyramid Power, or a real tiny Zero Point Module (imported from Stargate Atlantis from another Galaxy somewhere no-less). Must be one hell of an Import Tax. Since when is Direct Current, "Analog Based"? There are Direct Current Power Supplies to Digital Microprocessors, unless these things run off of a vacuum.
Jmcgrogan2-Sorry, I am still trying to translate what you are saying into something that makes sense. You classified DC Power to an Analog Stage as being, "Analog Based". Since when if both Analog and Digital Stages are based on DC Power Supplies. There is no difference in the Power Supply to either, other than the designed Voltages. DC is DC, regardless if it is supplying a Digital or Analog Stage. There is nothing special about the DC Power Supply to an Analog Stage that sets it apart from the DC Power Supply to a Digital One. Your claim that, "no-one puts Tubes, fancy Caps or Resistors in the Power Supply to Digital Stages as opposed to Analog Stages" is a bogus claim. Both Digital and Analog Stages recieve the same DC Power (at different regulated Voltages) from the same source, the AC-DC Rectifying Stage. This Stage, if Tube Rectified, supplies DC Power to both Analog and Digital Stages. There is nothing that sets this DC Power apart when supplying an Analog Stage as opposed to an Digital One, other than the underlying Regulated Voltage. It is bogus to claim that DC Power is anything else (Analog Based What?) other than simply DC Power! There is no real difference, other than Voltage, and it is simply wrong to imply that there is a difference! This is a fact, not a matter of agreeing to disagree, and stop using that as an excuse to support an bogus arguement! Your false statement IS the issue, stop trying to distract from that by using the issues of this Thread as cover! You are not fooling anyone, least of all me! Obviously, I am going to have to keep an eye on you! Your Statement was false, Period. You are not going to be able to diplomatically slime your way out of this one! Busted, with your hands firmly in the Cookie Jar, lets see you try to charm your way out of this one! I have a firm grip on you, and I am not letting go! You haven't a clue as to how the Power Supply works in any Stereo Component, more or less a CD Player/Processor, do you?
You want the short version? Analog based DC Power is a completely bogus and twisted concept. Analog based DC Power, this is your word construct, not mine! It is something that would be constructed by someone who has no idea of how a Power Supply works in any Stereo Component. It sounds like someone who doesn't know what he is talking about, trying to pretend like he knows what he is talking about. Life is too short to have the wool pulled over one's eyes. I enjoy myself more when someone is NOT seriously trying to jerk my chain. Life is too long to allow such a gross conceptual error to continue!
Great! Analog based DC Power exists, the Earth really is flat, the Moon is really made of Green Cheese, the Loch Ness Monster really exists, so does Big Foot, the Land of OZ really exists, and Smoking actually improves your health! Are there any other Myths out there that someone wants to carve into reality? I don't want to be part of a Community that conveniently lives in complete denial of Reality, one that chooses to ignore that Man hiding behind that curtain in the Land of OZ! You just can't make things up as you go along, and then get offended when someone challenges your Fantasy with a healthy dose of reality! Perhaps this is all nothing more than Angel Dust Flashbacks to the Land of OZ. Just one request, can I be there when anyone decides that they can fly, and jumps off a cliff to prove it? I know, I am the idiot for even concidering the downside of this endeavor! How dare I insult anyones attempt at this brave exercise! I am the one who's logic is flawed! I'm not being very nice and dyplomatic about this example of absolute stupidity! I am calling the Men In Black, you have got to be the nuttiest excuse for an Alien from another Planet! No wonder that you will believe just about anything you read and hear, no matter how much Reality exists to the contrary. You don't want to read beyond the first line or two, because it would really upset your existence in a Fantasy World! Analog based DC Power does not exist, it is a Government Conspiracy to get you to buy more expensive Stereo's to help support the Economy! Is that enough Fantasy for you to now believe, I can just as well make it up as I go along! Wait, they have found me, they are pounding at the door! It is the Government, they have come to get me! Make sure more people are informed of the Conspiracy, gotta go!
REALLY!
Almarg-The Power Supply to Analog circuitry, as well as Digital circuitry, comes from the same source. It is Direct Current from the Rectifying Stage. This Direct Current isn't Transmogrified if it is supplying an Analog circuit instead of a Digital circuit. How do you Transmogrify Direct current anyways? Jmcgrogan2 claims that no-one uses Tubes, fancy caps or resistors in the Power Supply to a Digital Stage as opposed to an Analog Stage. The point is completely bogus, since both Digital and Analog Stages both run off of the same power source, Direct Current from the Rectifying Stage! Hello, Tubes are used for Rectifying AC to DC to supply Analog and Digital Stages! My System does exactly that, and it is certainly not the only one that uses Tubes for the Rectifying Stage. Direct Current is not Analog based, regardless of whatever analog circuitry is being supplied by this direct current. If I must, I will supply a list of Manufacturers and their Model numbers that utilize Vacuum Tubes in their Rectifying Stages. I guarantee you that there will be more than just a handful. This spans Amplifiers, Pre-Amps, CD Players, Digital Processors, you name it! The issue was never Analog Circuitry, it was fancy Resistors, capacitors, and Vacuum Tubes! All of these are used in a Rectifying Stage to supply Direct Current to both Analog and Digital circuitry-FROM THE SAME SOURCE!
Almarg-

"The Rectifying Stage Circuit IS the Power Supply, and it is an Analog Circuit"

Then if the Rectifying Stage Circuit IS the Power Supply, and it utilizes Tubes, then Jmcgrogan2's claim that no-one uses Tubes-fancy Caps-or Resistors in the Power Supply for Digital Stages is completely bogus. Is there supposed to be a separate Rectifying Stage for both Analog
and Digital Stages? Can no-one see the contradiction, or did I.Q.'s just drop sharply on this Thread? A Rectifying Stage, that uses Analog circuitry, to convert AC to DC, whose DC Output is never the less NOT Analog based- what is so difficult to understand about this? Am I going too fast for everyone? S-h-o-u-l-d I s-l-o-w i-t d-o-w-n f-o-r e-v-e-r-y-o-n-e? Maybe if I took the Vacuum Tubes out of the Rectifying Stage of my DAC, and shoved them in Jmcgrogan2's dark place. Then broke them off, perhaps then he would get the point that they are NOT simply part of my imagination! Try Rectumfying that! Almarg- what are you trying to tell me- that no DAC in existence can utilize Vacuum Tubes in its Rectifying Stage as a Power Supply to its Digital Circuits? And you agree with Jmcgrogan2 in this regard? If you really are an EE, I would suggest that you stick to working on Solid State circuits, because you are apparently as clueless as Jmcgrogan2! Where do I get off of this Flat Earth Society Thread anyways?
Almarg-
I am going to try this one more time. It doesn't matter if one is refering to the DAC as the entire component or strictly the the "digital to analog converter" dac circuit or chip! There is no distinguishing the power supply within the overall component. Everything that is the Component, as well as what is part of the component, is fed Direct Current via the Rectifying Stage. The ONLY thing that gets fed anything else, Alternating Current, is the Rectifying Stage itself. The ONLY difference to the power supply of each part of the Component is the Voltage, and Capacitance of the DIRECT CURRENT via the Rectifying Stage! The DAC Circuit is supplied DC from the same source, the Analog Output Stage is supplied DC from the same source, that source being the Rectifying Stage. There is no distinction, other than Voltage and Capacitance, between the power to the Analog Output Buffer Stage and the D/A Converter Stage. Other than Voltage and Capacitance, Direct Current is Direct Current no matter what it supplies. Why do you and Jmcgrogan2 insist that there is a distinction between Two Direct Current Power Supplies that come from the same source? Do you not concider the Direct Current Output of the Rectifying Stage as being part of the Power Supply that we are refering to? Other than Voltage and Capacitance, what is the specification of the distinction between two Direct Current Power Supplies that you are refering to? Wave Amplitude and Cycles Per Second? Two Direct Current Power Supplies, one to the Analog Stage, one to the D/A Converter Stage, what is the distinction other than Voltage and Capacitance? Need I remind anyone that these two DC Power Supplies come from the same source?
This is basically the same logic and reason, as concidering the Lungs as not being part of the Human Circulatory System. If you eliminate the Lungs from the Equation, just what is the Circulatory System circulating?
Sorry to notice the gap in your logic and reason being as wide as the Grand Canyon. The best that I can do is offer you a shovel.
Pettyofficer: Sorry to disagree, my Space Tech Lab DA-64XT
DAC utilizes an STR-104 Tube Rectifier. This
Rectifier does have two very, very large Tubes
that supply power to all of the components
within the DAC.

Nice try Almarg, components within the DAC refers to the D/A Converter Chip Set amongst other Circuits, not the entire Component. Notice the use of the "Plural" version of component, meaning more than one. Notice the use of the word "within" meaning inside. Perhaps I am really going too fast for everyone, or is everyone trying to pull a fast one over me! You are going to have to try a little harder than that!
Almarg-everything that you and Jmcgrogan2 have suggested-can only lead to one conclusion. That you and him both believe that there is a serious distinction between the DC Current Supply to the Analog Stage as opposed to the Digital Stage. If not-why then bring up the issue of Vacuum Tubes being used in one or the other, when Vacuum Tubes are being used to supply power to both? Just what the Hell is your point? Mine is very simple, when Vacuum Tubes are used in the Rectifying Stage of a DAC, they become part of the power supply to both the Analog and Digital Stages! Someone is obviously NOT just strictly using Tubes in the Analog Stage as opposed to the Digital. If the Rectifying Stage is Solid State, and Tubes are used elsewhere, then Jmcgrogan2's statement might make sense. Why is this so hard for everyone to understand?
Audiofeil- perhaps YOUR tradition continues after you served
in the U.S. Navy years ago. Atleast I can abreviate "U S"! It is that funny looking key on your keyboard with an arrow pointing to your right (your military right-damn it) with a weird little dot just below it. I seem to remember being able to carry my liquor a whole hell of alot better than you. I think you need to sleep it off!
Jmcgrogan2- No-one is misinterpreting the Digital to Analog Converter chip to mean the Power Supply. Just don't understand how you can eliminate or exclude the Power Supply from the Digital to Analog Converter Chip Circuit. We are supposed to exclude any concideration of the Rectifying Power Supply Stage in discussing Tubes, fancy Caps or Resistors? If any of these are used in the Rectifying Power Supply, then they cannot be excluded from being part of the Digital to Analog Converter Chip Circuit. The Power Supply to ANY Circuit, IS PART of that Circuit! To argue otherwise, is being in denial of basic Electrical and Electronic Theory. There is no misinterpretation, bad English, or Drinking problem. There is simply YOUR inability to connect the Rectifying Power Supply TO the Digital/Analog Converter Chip Circuit. The Circuit will not work very well if it is SEPARATED from its Power Supply, but perhaps I am mistaken (hic!), and I need a whole HELL OF ALOT more booze to finally see things from your point of view!
Almarg- if you really are an E.E.- then you already know that the Power Supply to any Circuit, including an Digital to Analog Converter Chip Circuit, IS PART OF THAT CIRCUIT! Any distinction or interpretation WILL NOT CHANGE THAT FACT! You have got to have SOMETHING to conduct Current over the GAPS of your so-called "Distinctions" within a Circuit. Distinctions don't conduct current very well! I seriously doubt that your Distinctions would even insulate me from getting zapped if I were to touch a live circuit! Must I force you to actually touch the live Circuit of a Digital to Analog Converter Chip, and get zapped, before you will acknowledge that that Vacuum Tube Rectifying Stage DOES INDEED carry one hell of a punch? Since perhaps I don't understand English, I am mistaken there as well! If you want to continue working on live Circuits, thinking that Distinctions will insulate you from getting Zapped, perhaps I am indeed the Idiot for challenging your line of thought! Please, don't let me interfere with your work any longer!
Everyone-you can give up on me, but please don't give up on the Laws of Physics, nor Electrical and Electronic Theory! You might live a little longer, and you just might avoid earning that Darwin Award! The Power Supply to any Circuit is separate and distinct from the Circuit it supplies, well I guess there is no sense in unplugging anything then. Everything will be perfectly safe when playing around in a live Circuit! I would not recommend practicing Electrical Safety in accordance with the Electrical Theory of Jmcgrogan2 and Almarg, unless of course, you are the Frankenstein Monster! Face it Gentlemen, neither one of you are exactly Nicholas Tesla. You will indeed conduct Electricity! If you don't believe me, I have a special Posthumous Award for the both of you!
Cajunpepe-
Please tell me that you don't prefer the sticking of of a fork in the Electrical Outlet, the same as your two friends Jmcgrogan2 and Almarg. Hey guys, there are only so many Darwin awards to go around! So exactly what kind of drug am I supposed to take to convince me that this is a safe exercise? Is there one that can completely destroy ones survival instinct? You keep on taking it, I think that I will pass!
You guys like playing around with a live circuit, because you believe that a Rectifying Power Supply is irrelevant? You might want to try putting your hand in a bucket of water while you do this, if you want to kick it up a notch, or you could even join hands! That should give you a nice, warm, fuzzy, and tingly feeling! Something told me that you, Cajunepe, would be a big masochistic fan of self imposed SHOCK TREATMENT! Just don't get hooked on it, you don't have that many brain cells to spare!
Damn it all, I guess that I will just have to split that Darwin award amongst the three of you! You guys could try something a little more safer and still get your kicks, something like Skydiving or Bungie Jumping! I guess you guys just like that tingling feeling too much!
You too, Cajunpepe, will conduct Electricity, but by all means you can go on argueing wth me till Hell freezes over that you don't! What do I know, I'm on Drugs!
Jmcgrogan2-SNAP!

Almarg-CRACKLE!

Cajunpepe-POP!

Is that noise my breakfast cereal, or my Drugs kicking in? If it is neither, then (ZAP!) someone is spasming on the way to becoming a crispy critter! Naw, couldn't be, I must be drunk or my inability to understand English must be affecting my hearing! Why am I argueing with a trio of crispy critters anyways? Maybe they still have some arguement left in them, the way they are still happily jiggling on the floor? Is that a grimace or a smile on their faces? Oops- eyes just burst out of their sockets-they must be happy! I will be happy too, just as soon as I take some more drugs,but I don't think that I will be as happy as those three! Atleast they look happier!
Sorry about the lack of brevity, 2chnlben, but what do you expect from someone who is on drugs. Alright, lets try to set all hurt feelings aside, and I will try to be brief as possible. I firmly believe that the Rectifying Power Stage to ANY circuit IS part of that circuit. If Tubes are used in the Rectifying Power Stage of a circuit, then those Tubes ARE part of that circuit REGARDLESS if that circuit is an Analog Output Stage circuit or a Digital to Analog Converter circuit. All that you have to do is follow where the current flows to, and where it flows from within that closed circuit. If you are an Electronics Expert, and strongly disagree, and want to use distinctions to bolster your arguement, knock yourself out. I suppose that anyone can make a reasonable arguement based on distinctions.