Recent content by MRC001
  1. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    Mine isn't for sale! The WM8741 isn't SOTA anymore (not based on the numbers) given new offerings from Sabre & AKM. But some of these DAC chips can be finicky to implement, as evidenced by the Sabre "IMD Hump" that many DACs using this chip had, and some did not. But I think we don't hear the...
  2. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    I don't think it violates any confidentiality since most companies publish their manuals for anyone to download. And the manual doesn't say copyright or do not distribute. So here it is (attached).
  3. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    Do you have the Soul user manual? I'm sure Jan Meier can send you a copy if you ask.
  4. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    With most DAC preamps, that would be an easy question: set the volume to max, or as high as possible. That's because as you turn down the volume, the SNR drops with it. The max SNR is at full volume. That's because most preamps have a fixed gain ratio and the volume knob just attenuates the...
  5. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    The reverse of that. Down is classic filtering, phase correct. It is a brickwall (sharp) filter only at sampling rates 48k and lower. At 88 and higher, it is still phase correct, but has slow rolloff. Up is the minimum phase filter that most people describe as having the softer more "analog"...
  6. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    The one on the R selects what kind of anti-aliasing filter the DAC uses. Up is minimum phase, having asymmetric impulse response. Down is linear phase, having symmetric impulse response. More on that here: http://mclements.net/blogWP/index.php/2019/12/24/corda-soul-wm8741-dac-filters/ The one...
  7. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    I too have observed that the Soul has a natural smoothness and clarity to the mids and highs that I haven't heard with other amps. The Oppo HA-1 for example sounds just a hint grainy in comparison to the Soul, even though it is not a grainy sounding amp. I suspect this is due mainly to the...
  8. MRC001

    Audeze LCD-1

    This surprises me, since the FR of the LCD-1 posted earlier in this thread shows attenuated top & bottom octaves, which relatively emphasizes the midrange, and is the opposite of your observation.
  9. MRC001

    Audeze LCD-1

    The LCD-2 classic and Fazor are similar but they do sound different. The Fazor elements make the LCD-2 heavier, but they also give it flatter more neutral frequency response. There may also be other sonic differences, but the FR is what is most noticeable to me.
  10. MRC001

    Audeze LCD-1

    When considering purchase for trial, it's worth mention that headphones.com, which formerly was Tyll's old Headroom company, has 365-day returns. My only relationship with them is buying a few things from them over the years since the late 90s.
  11. MRC001

    Audeze LCD-1

    Your last premise is correct, which is why I specifically mentioned the Audeze LCD series.
  12. MRC001

    Audeze LCD-1

    I agree about the Senns; the HD580 were my first good pair of headphones I bought in 1999. 20 years and several replacement pads and cables later I still own them. You are over-generalizing about planars. A planar isn't necessarily sharper or more detailed than a dynamic. It might be, or it...
  13. MRC001

    Audeze LCD-1

    That's certainly true. I believe a significant contributing factor to this is the large amount of individual variation in HRTF. PS I believe in doing it from measurements as a first draft to get an EQ that is at least in the right ballpark as a starting point. But you've got to listen to it and...
  14. MRC001

    Audeze LCD-1

    Sure, and you can remove the headphone from the head, reinstall it, and it will measure slightly differently. This is yet another reason to keep the EQ as simple and gentle as possible. Only correct the largest deviations, and don't correct them fully. The goal of EQ should be to gently take it...
  15. MRC001

    Audeze LCD-1

    For example with the LCD-1 I might try: +6 dB @ 100, Q = 0.7, shelf (about the same as Oratory 1990's curve) +3 dB @ 2000, Q = 1.2, peak -3 dB @ 3000, Q = 1.5, peak +3 dB @ 6000, Q = 1.7, peak Before EQ, apply an overall gain reduction of -6 dB to prevent the +6 bass EQ from clipping. If -6 dB...
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