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Radsone EarStudio ES100

Discussion in 'Portable Headphone Amps' started by m4rkw, Dec 12, 2017.
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  1. Lurk650
    I heard a minimal difference in quality with Tidal, a bit more dynamics & resolution. In the end though, discovery of new music is better with Spotify not to mention the UI is a lot better than Tidal, Tidal reminds me of Amazon Music app lol.
  2. monsieurfromag3
    From a too brief listen last year it seems to me the Chord Mojo is overdue for a price cut. What does it do better than the now cheaper RHA L1, or the Pro-ject Pre Box S2? Chord themselves didn’t seem to have a lot riding on the Mojo anymore at the show where I heard it: they’d paired it with a mediocre, discontinued model from Focal. That’s also why I was so underwhelmed, I know it can do better!

    The Earstudio takes us all the way to the Land of Diminishing Returns, where Substantial Improvements are paid for with sweat and tears (or lots of cash).
  3. SubMash
    All mastering is done in 24/32 bit (often float nowadays). 16bit downsamlling is done with additional dithering which goes beyond anyones ears resolution. If anyone does remastering - they release it in 16 bit almost always. Because this is where it pays off. Very few things remastered for 24bit release only and somehow prohibited from 16 bit distribution.
  4. meinname123
    Yes and no.
    Though more and more Studios/Distributors are using the original Studio master for all their distribution channels, it's still usual for most of them that this original studio master is getting re-edited before it's getting to be released to these channels.(sometimes even a totally different person is doing those reedits - maybe even for every channel an extra person.)

    (and this has nothing to do with a re-release of a album as remastered Version or something like this. - cause for this a new Studio master gets created)

    Radio often gets more brick-walled as it has to be loud to be noticed
    the master for the Premaster (often a DDP Fileset - needed for creating the physical Glasmaster) for CD is often the same as radio.
    Normal Streaming like Spotify sometimes get it's own mastering (surprisingly less brick-walled than CD) but often CD master is used.
    Due technical reasons a Vinyl release gets its own master. (if a vinyl is pressed :wink: - sometimes the master is the same as for SACD and so on)
    If the Mastered for iTunes badge is wanted (which includes extra promo on iTunes for free or at least discounted) the master for apple need to be inside special limits. So they get a own master (or the same as next one)
    And SACD/DVD-Audio or other highres stuff like hdtracks and qobuz -- //edit: and also Tidal Masters (MQA)

    Normally at least least one 16-bit (CD and digital distribution) and one 24-bit Master which have different normalizer/limiter settings (resulting in different dynamic) are produced and distributed.
    (all the talk is more or less independent from bitdepth and samplerate adjustments)

    //edit: as example take a look at one of the first search results i found on this topic:
    Even the standard Service includes:
    "16-bit (CD and digital distribution), 24-bit (Mastered for iTunes) plus standard 128kbps and high quality 320kbps Mp3 master formats provided"

    //another edit: i often notice at qobuz that the provide at least 2 different masters for the same release.
    If i set the Player to Highres i get a different master which has more dynamic range than when i set quality to CD.
    (I have confirmed it for myself and a friend by using a tool which can directly download the flac from their servers and used TT DR Offline Meter on these files - and there was depending on the album a huge difference between them)
    Last edited: Aug 14, 2018
  5. Marco Angel
    has anybody listen to the RHA CL1 via the ES100? have the oportunity to buy them but not test them =/
  6. trellus
    Has anyone used this clip while being active, e.g., at the gym? I read one review in particular on Amazon in which the reviewer praised everything else about this (including the sound) but groused about the "garbage" clip which according to the reviewer doesn't grip very well and is thus "useless." I'm hoping that reviewer is wrong.
  7. stancorrected
    The clip is lightweight and not particularly "grippy" and I normally put the ES100 in a pocket (shirt/ shorts etc.).Today I was carrying it clipped to a golf type shirt around the neck and I had to make a dash to cross a road before the lights changed. The ES100 flew off when I accelerated into a fairly gentle jog. The good news was, it was so light that it neither disconnected from the cable nor pulled my earphones out. It was a bit disconcerting though swinging around at the end of the cable until I got to the other side of the road.
    Last edited: Aug 14, 2018
    trellus likes this.
  8. monsieurfromag3
    1) the device is so tiny, I rarely use the clip. Those shorts’ pockets made to hold a locker key? Forget about stuffing your phone in there; but they accomodate the ES100 easy.

    2) the clip grips fine. It doesn’t have huge clamping force, but I’m a personal trainer, train 2 to 3 hours a day which often involve upside-down sessions, dynamic inversions, hand balancing or bar work at weird angles and spots of running and treadmill climbing, and I don’t fear losing the ES100.
    rafaelo and trellus like this.
  9. monsieurfromag3
    The following post can be found on p.29 of the thread for the Ifi xDSD. It both proves me right and proves me wrong on the matter of codec support.

    Radsone’s claim on the Earstudio’s website of a “proprietary audio processing algorithm optimized for Bluetooth streaming” makes me think they have done their homework on BT jitter elimination in a similar way to Ifi’s. Higher-than-aptX support does indeed sound like it’s much less important than properly clocking the BT signal and feeding it to a capable conversion and amp section.

    At the same time Ifi regret not being able to support higher-end codecs this time around, LDAC in particular, not so much for the 24-bit depth but rather for the upgrade to a 96kHz sample rate. They don’t comment on the extent of the improvement that would achieve, they just write it “would make sense.”
  10. trellus
    Unfortunately, all but two of the shorts I use at the gym, lack pockets -- so the existing, so I clip my existing el cheapo Bluetooth receiver (a Trond) to the bottom of my shirt. I'm still probably going to get the Radsone in any case and just try it for myself to see if it works for that scenario -- if not, I'll use it for other scenarios.
    monsieurfromag3 likes this.
  11. shrimants
    Clipping to the bottom of your shirt definitely won't work. Top of shirt? Yes. Personally I'd just get an arm band or sweat band and clip to that and tie up any cable slack
    trellus likes this.
  12. PiSkyHiFi
    To a large degree, the fact that the range is 24-bit in AptX HD does compensate for not going higher than 48KHz, especially when considering the jitter (time domain imprecision) is large with the Bluetooth chain as this article points out.

    My understanding is that the ESS SoC the 9218, like it's DAC only cousins (9018, 9023, 9028 and 9038) has an excellent jitter elimination process, that helps isolate the incoming jitter through some kind of async internal clock feedback system (don't quote me on that - that's just my best interpretation) providing a robustness that is similar, but more flexible than reclocking alone - with more parallel units of this async time domain recovery aggregating a more smooth clock like a kind of tiny analog buffer - hence the Quad DAC term, it's just a way of providing protection from external components increasing the jitter, the 9018 has 8 parallel units averaging out together to make a much smoother clock.

    I think the AK 4375a has some jitter elimination, but the ESS chips I believe are the best at this.

    I don't know how this relates to Bluetooth jitter - with USB, clocking comes either as isosynchronous, asynchronous or adaptive.

    Isosynchronous uses the source clock for the DAC - not the best since the timing is determined by the USB data stream clock which is not designed for audio precision.
    Asynchronous uses another clock at the sink and forces the data stream to buffer, with the source being a slave to filling it as soon as the sink is ready for more data - this is the best for USB audio, allowing any type of DAC clock to force the data stream to follow it.
    The last mode, adaptive, doesn't reclock like asynchronous, but tries to compensate frames - the ESS chipset is good enough to compensate even further and allow for close to asynchronous like clocking smoothness.

    Now the ES100 uses a kind of isosynchronous mode for Bluetooth timing - @wslee mentioned earlier in this thread, but I think the data is possibly reshaped to more closely resemble the original intended clock like an adaptive mode would or something to that effect, which may well be the best method if you can't simply improve the timing of the original data.

    Please @wslee, if it's not too proprietary, enlighten us further.
    monsieurfromag3 likes this.
  13. CardigdanWalk
    For all those questioning the clip, it was found a great and easy solution was attaching a small amount off Velcro / hook loop (only 1 side) to the inside worked wonders to increase friction and fix all concerns!
  14. PiSkyHiFi
    earstudio_symphonio.jpg Now, my other headphones either sound better wired (Focal Elear balanced 80 Ohm) or about the same (MSR7 unbalanced 35 Ohm) as through the Earstudio but these new earsbuds, the Symphonio Dragon 2+ (32Ohm balanced) sound a little better....

    The functionality is superb now, really easy to handle portable sound, earbuds straight in, clip it on and switch it on.:dt880smile:
    Last edited: Aug 15, 2018
    antdroid, trellus and monsieurfromag3 like this.
  15. CardigdanWalk

    Feature request time:

    The ability to “lock” the maximum analogue volume of the device?

    Bonus: a small tone or beep when that maximum limit is reached.

    I.e. I really don’t want to go above -25.0 dB, even though I know it can, I am worried about damaging my ears and my IEM.

    If I set this I know I can just push the volume up buttok the device without having to check if I’ve gone over on my phone!

    Thanks again for an amazing device, I love it and use it everyday!
    SubMash likes this.
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