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  1. MRC001

    How is a $1,000 Headphones Amp Better Than a $100 Amp?

    I agree. IME, "neutral" means flat FR and "transparent" means low distortion & noise (high SINAD).
  2. MRC001

    How is a $1,000 Headphones Amp Better Than a $100 Amp?

    We'll never see a headphone everyone agrees is neutral, because everyone has a different HRTF perceiving the same sounds differently. With headphones, "flat frequency response" is a target that moves and changes from person to person.
  3. MRC001

    How is a $1,000 Headphones Amp Better Than a $100 Amp?

    Masking may or may not take care of (1), depending on the sensitivity of the headphone and the kind of music you listen to. And setting the volume above 8-9 o'clock may not be an option; depends on amp gain and headphone sensitivity. My point is, these issues separate the good from the great...
  4. MRC001

    How is a $1,000 Headphones Amp Better Than a $100 Amp?

    The key areas that separate a well engineered and built headphone amp, from others, are: 1. S/N ratio at low volumes 2. Channel balance (especially at low volumes) 3. Output impedance Most amp specifications are measured at full output, which is misleading for 2 reasons. (A) nobody actually...
  5. MRC001

    Audeze LCD-2 Impressions Thread

    The LCD-2 are bass monsters, but but do not have "huge" bass. The bass is not emphasized. But it does not roll off, it has flat linear response down to subsonics with extremely low distortion. The LCD-2 and HD800 have complementary/opposite responses. The LCD-2 has ruler-flat bass and a dip in...
  6. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    I have a Soul and I did some basic measurements using my sound card (an ESI Juli@, which has balanced inputs). That's not ideal of course, but the Juli@ is a decent sound card with distortion & noise below audible thresholds, so it would reveal any obvious or audible flaws. In summary, the Soul...
  7. MRC001

    Review of Meier Audio Corda JAZZ with ƒƒ-technology upgrade

    Hey JediMa70, I replied to your post on ASR, where they also measured & reviewed the SMSP SP200. The SP200 has impressive measurements and looks like a great amp. But remember, most amps are measured at or near full-scale output, which nobody actually uses because it's way too loud for...
  8. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    A driver is often delivered as a ZIP file. After downloading it, you open it and you can see the files it contains. One of these files is usually the installer program. Double-click it to run it. Usually these programs have a file extension of EXE or MSI, but Windows sometimes hides extensions...
  9. MRC001

    Meier Audio Corda Soul - TOTL DAC/AMP/DSP

    I suspect this is an issue with Windows, not with the Soul. That's because every device I've plugged into the Soul's USB input: my phone, tablet, desktop & laptop computers, all work without any need for drivers. But I run Linux, not Windows or Mac. The Soul's USB input actually works better...
  10. MRC001

    Oppo HA-1 Impressions Thread

    Right. Just remember the natural airflow is bottom to top. Make sure the fan doesn't reverse that flow, but accelerates it.
  11. MRC001

    Oppo HA-1 Impressions Thread

    It can't hurt to cool it, especially for the HA-1 which runs hotter than most solid state preamps. Sure, it is designed to run hot and is well ventilated. But all else equal, higher temps mean slightly higher internal noise (thermal noise depends in part on temperature) and shorter life of...
  12. MRC001

    Oppo HA-1 Impressions Thread

    I think the HA-1 still holds its own well. It's clean, full-featured and powerful. Last year, Amir ran detailed measurements and published them on ASR. It measured respectably well (though it did show the dreaded Sabre IMD "hump"). And it produced 7 clean watts of power, about twice its rating...
  13. MRC001

    Reply to review by 'MRC001' on item 'Meier-Audio Corda Soul'

    I've been using the Soul daily for over a year now. It's proven reliable and sounds fantastic. Its transparency does full justice to the best modern high res recordings (especially classical music), and its crossfeed and tone controls have made some of my older and imperfectly recorded albums...
  14. MRC001

    Review of Meier Audio Corda JAZZ with ƒƒ-technology upgrade

    This thread is a few years old, we've learned some things about the Jazz we didn't know before, and some great new amps have become available. All that is to say, a year ago when I needed another headphone amp, I got a JDS Atom instead of another Jazz. The Geshelli Archel 2 would be another...
  15. 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).
  16. 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...
  17. 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"...
  18. 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...
  19. 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.
  20. 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.
  21. 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.
  22. 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...
  23. 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...
  24. 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...
  25. 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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