Fourlegs

Dealer
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About Fourlegs

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    Melton Mowbray
  • Real Name
    Nick

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    I am in the Hi-Fi trade

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  1. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    We only have your belief there to support your view of that. On the other hand we have a well respected designer of digital equipment (Innuos) saying something different to you. You seem to be implying that Innuos kit is "extremely poorly designed" which is a barely credible notion. Your blind faith in believing what one manufacturer (RME) says is touching but your credibility is not enhanced by the fact that you are unable to discuss any solid technical issues beyond repeating simplistic mantra. RME admit in their manual that their digital volume does affect the bit resolution of the signal. They claim that it is not audible which may or may not be the case. On the other hand Rob Watts says of the Dave volume control, "The digital data-path (from input right through to the pulse array outputs) is better than 350 dB, so all truncation errors are eliminated - thus a major change in volume will have no effect on detail resolution and (more critically) depth perception." This might imply that RME are taking an overly simplistic view and that whilst any extra noise due to their reduction in bit resolution is below theoretical audible limits there might be other audible affects on the music such as depth perception. I am not sayin that I 'believe' one or the other, merely that there may be more to it than the RME stated position (which in any case is in their manual is more slanted to try to convince why they think their digital volume control is better than analogue volume controls).
  2. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    Basically yes. I was just pointing out that there are different ways that digital volume control is implemented. Some are destructive by stripping off bits and some are not. I was making no comment as to which method is used in any particular dac or eq process.
  3. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    If you understood how digital volume control is often implemented then you would not need to ask that question. And that is the basic problem of taking a measurist stance if you don’t know what you are talking about.
  4. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    It is a question of sound quality. EQ is not always a non destructive process, whether it is done in the digital domain or analogue domain. This is just in the same way that not all digital domain volume controls are able to control volume without degrading sound quality. This is fact, not belief, by the way.
  5. Fourlegs

    Valve amp questions...

    What they would have meant was simply adjusting the bias screw all the way to the minimum setting with the amps switched off. Of course in order to do this you need to know which way to turn the screw to be sure you are adjusting it in the right direction. On the Icon Audio 845 amps one of the adjustments is actually turned clockwise to reduce the bias.
  6. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    Plot spoiler - my Dave is still stunningly good at the basic DAC thingy function compared to the RME but you are a nice guy to think of helping me out like that. But it was never about seeing if the RME is a Dave beater and more about seeing how it performs at its price level. More at the end of the week.
  7. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    Let’s not get ahead of ourselves, we need to see first if it functions properly as a dac before we get to the tone controls bit.
  8. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    It will be without filters initially At the moment the RME is connected to an Innuos Zenith SE server via USB and I am using the XLR outputs from the RME direct to my Pass Labs XA60.8 monobloc power amps (ie using the RME volume control) which are driving my Spendor SP200 speakers. So far I have listened to the first movement of Holst's The Planets and also the first track of 'Convergence' by Malia. The plan is to listen to a variety of music here and also to compare and contrast with my Chord Dave. I have a few suitable power supplies here which I will also try to see if they make a difference. Also, I have here a 'cheap as chips' chinese DAC which was feted by Richard Dunn together with the 5V power supply which he also recommended. I had never got around to listening to them so this will be a good opportunity. Then, later in the week I plan to go to @TheFlash with the RME and my other DACs to compare it to what he has and also to hear it going into different amps and speakers (and hopefully his active ATC speakers). It will therefore be a few days before there is any feedback I'm afraid . . . . . . .
  9. stop fishing for compliments!
  10. Fourlegs

    Valve amp questions...

    Having done a quick search online it appears that the bias connection for the meter night be a jack, ie it has positive and negative connections to the jack and is not just a matter of inserting the meter probe in the hole. The manual I found online indicates a bias of 4.8v in which case you need to make sure your meter has the 0 to 10v DC range selected. That will effectively probably also turn the meter 'on' (it probably does not need batteries for the voltage measurement) Edit to say that you can check the DC volt reading of your meter by testing a normal battery volts just to make sure it is working.
  11. This is all exactly my point.
  12. Sorry but you miss the point. We have just agreed that that reference point IS NOT live music or the sound of an instrument or anything like that and is instead what is on the tape/file/LP. This is because of the almost certain manipulation of the source recording before it gets to the music file being played. So you cannot use your reference points for accuracy of reproduction because you do not know how that relates to what is actually on the file. See my point?
  13. And my point is who knows what that is meant to sound like . . . . . . ? What is the reference point for that sound?
  14. Fourlegs

    DAC Off Part 2: Qutest vs RME ADI-2 DAC

    The eagle has landed . . . . . . .
  15. Fourlegs

    Inverted poked tweeter dome

    Well done. I used to use a rubber suction valve grinding tool (engine valves) but then it happened so often I just ended up puckering my lips and sucking. Easy peasy.