Empire Ears - Discussion & Impressions (Formerly EarWerkz)

  1. Ethan Groover
    It's much more than twice as good with both ears! I look forward to your feedback once you have full stereo!
     
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    Deezel177 and Wyville like this.
  2. proedros
    anybody here pairing his wm1a with zeus XR , which setting is best - Normal gain or High Gain ?

    or is there no difference at all , what do you think personally ??
     
  3. NaiveSound

    Curiosity here too.
     
  4. Jackpot77
    Slight off-topic, but there have been a few very interesting posts over on one of the iFi threads about the effect of gain and whether you should listen with the taps fully open in a lower gain setting or go fit the higher output:

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    It seems that analogue vs. digital volume control and the potential impact ... is still not widely understood.

    Let us consider a few specific examples, in all cases a DAC with digital domain volume control, 5.3V maximum output with a 0dBFS Signal and 125dB rated signal to noise ratio at the maximum output is used. This is impressive performance, equivalent to 20.5 Bits.


    In fact, it is not easy to match or exceed this kind of noise performance in the real world, with real electronics. And independent measurements (performed the same way we do ours and using a slightly newer Audio Precision test) set places this DAC closer to 120dB and 4.9V maximum output, which is still VERY impressive performance in the real world.

    We will be using the real world figures of 120dB & 4.9V to calculate with.

    Further, something we also commonly use is a figure of 105dB SPL at 0dBFS signals. First, 105dB is the THX peak level for THX certified movie theatres with 0dBFS and is bloody loud (try it and check for the THX Certificate at your movie theatre) and 0dBFS is the highest signal level without clipping in the digital domain.

    Now, if we attach a headphone that gives 105dB (the) with 4.9V (e.g. HiFiman HE-6), we will get the full 120dB dynamic range as the digital volume control is at maximum. In fact the background noise level will be at around -15dB absolute, that is 15dB quieter than the threshold of human hearing. So in this case the audible dynamic range is 105dB (hearing threshold to maximum signal) and thus is equivalent to around 17.5 Bits.

    However if we take an IEM that gives 143dB (!!?? permanent hearing damage guaranteed) with 5.3V (e.g. Shure SE535)? In order to match the 105dB peak from the first case, we need to attenuate the signal by 38dB, or in another way of looking at it, by around 6.5Bit. Noise would now be at +23dB, quiet but clearly audible hiss.

    In this case the audible dynamic range is 82dB and thus is equivalent to around 13.5 Bits. Yup, that's well be low CD quality. This is the consequence of using a high sensitivity headphone with an Amp that has a high dynamic range but also a high maximum output.

    Now let’s add iEMatch in Ultra setting. The maximum SPL is now 119dB (STILL BLOODY LOUD) and noise is now -1dB, meaning the theoretical available dynamic is just a smidgen below 120dB and thus equals 20 Bits (if you like 120dB peak SPLs - some of us do!). At 105dB peak SPL we will have applied some 14dB of attenuation, or around 2.5Bits, so we again get 105dB audible dynamic range or 17.5 Bit.



    So in this specific case for the high sensitivity headphone adding iEMatch has restored 4 Bits or 24dB dynamic range. So iEMatch indeed "gives back" bits or dynamic range lost in the digital domain volume control.

    But is there sense in using iEMatch with an external headphone amp? Absolutely.

    Let’s consider the example above with a portable ESL IEM Setup (how freaked out is that - we absolutely love it).

    The headphone is 117dB @ 230V (amp's max) and the amplifier has a gain of 54dB with the volume turned up to maximum. So in order to produce 117dB, the amplifier needs 0.5V input voltage.



    This means that for a more normal 105dB we need to turn down the volume control substantially already if our source outputs 0.5V. Even most smartphones nowadays have more output than 0.5V and our 4.9V output DAC is WAY too loud if set to maximum undistorted output.

    If we set the DAC to line out mode with 3V @ 0dBFS (and thus 116dB or 19.5dB dynamic range) and set the volume on the headphone amp to produce 105dB, the attenuation in the headphone amp volume control would be 28dB, putting the volume control VERY low on its travel, which generally does not sound as good (yes there is a technical reason) andleave very little usable volume control range.

    On the plus side, using this analogue domain volume control does avoid loosing bits anddynamic range of headphone (117dB) DAC 116dB are well matched. We can get morevolume control range/travel if we instead usethe DAC's digital volume control to drop thesignal, but if we do this, we again start losingbits/dynamic range, if we lower the volume by 24dB (to 0.375V) we lose 4 bits.. imagine listening to Tidal streaming and paying for 16Bits but listening to 14Bits!

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    No idea how the Sony handles volume (presume it's digital from the design of the unit), but this seems to indicate that lower gain and higher digital volume is preferable, especially as the Zeus is pretty easy to drive (for reference, I actually use the IEMatch with my Zeus-XR to reduce hiss on some of my noisier sources, and have generally been pretty happy with the results. Slightly O/T, but it might help?
     
  5. NaiveSound
    It's a early to say but the Sony wm1a does not impress when using Zeus XR. Mojo a better pairing by far.


    Wm1a not burned it but I doubt it will be a massive improvement wheb burned in.. And it needs to be a big thing at this point.


    Very disappointed
     
    tim0chan likes this.
  6. proedros
    i love my Zeus XR , this is a great ciem and i am addicted to it

    @NaiveSound , you are impatient , easily disapointed and also using a (silver) cable that probably does not does justice/match zeus as it should

    in any case , you can sell the wm1a and use the funds to buy another source , so don't fret about it

    we keep only what makes us happy , this is the best thing about this hobby

    cheers
     
  7. NaiveSound
    True that, mojo sounds blissful with Zeus, even when using a silver cable. I feel wm1a is just not worth the price.
     
  8. Twitley
    Is isolation compared to other EMIs, what gives?
     
  9. twister6 Contributor
    Which silver cable? And, 3.5mm or balanced 4.4mm port? I don't know which silver cable you are using (all silver cables are not created equally :wink:), but typically they don't have the best pair up with Zeus, something like pure copper (Ares II) might be better, or going up the food chain to 1960 2wire (not 4wire in this case). Also, heard that many 1A users find 4.4mm balanced port to be superior to single ended 3.5mm.
     
  10. NaiveSound
    Single ended whiplash cable stock with zeus

    Balanced silver dragon... Just not good
     
  11. subguy812
    The Ares II is a great, relatively inexpensive, pairing for the Zeus. I also enjoy my Truth Copper with the Zeus. Silver cables and wide bore tips exacerbate the brightness. SPC cables can be touch or go, you need to test them.
     
  12. aaf evo
    Did most Zeus owners in here go with a custom fit?
     
  13. EagleWings
    Earlier, many of us preferred the custom Zeus because, the universal shells were a bit on the large side. But the new shells are considerably smaller and more ergonomic is what people have been reporting.
     
  14. Twitley
    The problem of custom is the resale, because you have to go through the box reshell.
    A smaller shell will be better suited to reach more people.
     
    ranfan likes this.
  15. aaf evo
    I have my demo universal XR arriving tomorrow, I feel like a little kid on Christmas lol.
     
    NaiveSound likes this.

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