exa

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About exa

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  1. Here is my take on mods vs. making quality original design and implementing it without cutting corners. A good design is an integral whole, all pieces fit together and the result is more than the sum of the parts. It is like a mosaic, it is a complete picture that makes sense. Replace one piece and the picture is no longer one whole thing, it becomes distorted or broken. Now consider a design that is made of the latest buzz-word components and technologies for the purpose to attract attention. It is likely not a coherent, well integrated design. It can be compared with the picture in a kaleidoscope. There are shiny bits inside, but there is no complete picture. Turn the kaleidoscope, the same components will make another picture that is different, (sounds different) but makes no sense. Then make a mode to the buzz-word design, change one red sparkling piece with a blue one. Change a red capacitor with a blue one. It is like turning the kaleidoscope, you will see (or hear) another fragmented picture. For how long can you be entertained with different sparkling bits that make no coherent whole? At exaSound we make mosaic designs. Mosaic designs become broken when moded. Kaleidoscopic designs can be endlessly moded and will never become integral, because the mod-guru can never apply a systematic design approach. These ideas apply not only to audio, in general a fragmented view of the reality that lacks some adequate understanding the systematic principals of creation is called kaleidoscopic idiotism.
  2. How come there are no mods of exaSound DACs? Perhaps they are made well to start with? Or they are too complicated for the mod-gurus? We make them with manual placement, you should be able to mod them by hand. Or perhaps the rational philosophy of the company attracts customers with critical independent thinking that are not prepared to pay for your services? Can you suggest how to mod an e32?
  3. So you know "it sounds so great". By earlier in this thread you were not so sure: "You must be feeling the pressure of these Chinese DACs that might give better sonic performance for less money. " It seems you have an agenda to promote something here - Chinese DACs and mod ideas for Chinese DACs. Our goal is to design and make exaSound DACs properly, so there is nothing left to mod.
  4. Having 32 DACs in parallel puts a very high current demand on the I/V stage (it's not worth it to discuss using the ES9038 in voltage mode). If the I/V stage is not done properly, the advantages of using the 9038 chip are lost. When it is done properly, the component count and the cost can increase significantly. We felt that it is not worth to make a device with the 9038 DAC chip just to show off a part number. It takes a while to develop a completely new analogue output stage and we will release it when we are completely satisfied with it. The 9028 DAC chip will remain relevant because it offers excellent price/performance benefits.
  5. I've illustrated that you reversed cause and effect - one of the most commonly used propaganda technologies. I will reply on the third part of your original post. In the meantime here are again the distortion measurements of our current flagship DAC - the e32: http://www.exasound.com/e32/e32DACMeasurements.aspx
  6. Not all of them measure super and few publish their measurements. The measurement show you that there are no mistakes in the design. Measurements are just two-dimensional slices of the reality. The final judgement is subjective, the human ear and brain are more sensitive than any measurement instrument. So you need both, when there is correlation between measurements and subjective appreciation the device is worth considering. We've just came back from the AXPONA Chicago show. A visitor came back twice to the exaSound room and told me something along the lines: "Do you remember that last year I asked you to rename your DAC? Well, l am saying it again, you should name it The Best Sounding DAC". Maybe he is a CA member and he can comment on it.
  7. Hello Ric, The topic of measurements that you are referring to starts with my post from March 24, 2017: "Your illustration of extra robustness is the presence of two transformers and two division walls. Can you show us the measurements for this device? We should be able to see the negative influence of the transformers on the noise measurements. I would argue that our approach to keep the power supply outside and away from the DAC delivers much superior signal to noise ratio. Here are the e20 measurements: http://www.exasound.com/e20/e20Measurements.aspx GUTB replies on March 26, 2017 with the only graph that he can finds for the Gustard X20U Pro. The presented graph is not about investigating power supply noise, so it is a bit out of topic. In my post from March 27, I point out about the different scales of the graphs and I explain the advantages use of galvanic isolation and external power supplies (the bottom of our graph is at -160 dB vs. 106dB for the Gustard X20U Pro). The discussion is about power supply induced noise, not about distortion. Within the context the graph of the exaSound e20 noise floor is appropriate and the the Gustard X20U Pro graph is about something else. Please check the original question and my reply from March 24: Check the link to the e20 measurements for distortion measurements.
  8. Hi Chris, I've just read your Notes From a Disconnected Axpona. When you came to our room you should have asked for the ..."Other Playlist". I had on the menu Kraftwerk, Ayreon – 01011001, Ark with Jørn Lande and Goran Bregovic & His Wedding and Funeral Band. After all, the theme for the exaSound room this year was Heavy Metal. In my experience there was some disconnect - the visitors don't know much about networked audio. They tell us they are familiar with the speakers and the amplifiers that we use and they are in love with the sound of the room, but they are afraid to make the move to digital audio, DACs and network players. On the other side there were some great connections. During the first hour of the first day of the show people came straight from the registration to our room on the 6th floor to experience our devices. Some kept coming back again and again. Here are some pictures from the exaSound room at AXPONA 2017.
  9. The new features of the e32 and the e38 DACs are discussed on page 40 of this thread. With the March 2017 engine upgrade of the Computer Audiophile forum some internal cross-links and some external links to discussion threads are lost. Here are several discussions about the exaSound products:
  10. Ted, bring a couple of nice tracks to play. I can show you new PlayPoint features that you've requested.
  11. We will demo the exaSound e32 DAC and the PlayPoint with Parasaound A 21 amplifier and Magnepan 3.7i speakers. Visit us at room 604.
  12. Every preamp brigs a bit of extra noise and distortion.Usually they are negligible. The preamp is useful for tasks like input selection and unified volume control. If you don't need these functions it is better to avoid the unnecessary amplification of the preamp.
  13. The THD+N graph that you are presenting is not appropriate for direct comparison of noise levels. I can only point out that the levels you show are around 0.0005% or -106dB. The graph of the e32 noise floor is showing levels at around -160dB to -170dB, or 0.000001% to 0.0000003%.