This is a (very) detailed measurements of FX-Audio DAC-X6 audio DAC và headphone amplifier. It also includes my listening impressions as usual. The FX-Audio DAC-X6 retails for just $58 shipped from Amazon: https://www.amazon.com/gp/product/B01HERNVFM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
So darn good in that front too. Many low cost USB DACs are limited lớn 96 KHz, not so here.Reliability was excellent under Roon without any failures using default settings. The only downfall it had was ignoring the volume control level in Roon. So if you rely on that for your volume màn chơi for your system, i.e. Have no pre-amp, then you can"t use this DAC. Hopefully this is a firmware limitation and can be fixed.As cranky as I can be, I can"t really find any faults here with the physical execution & overall functionality with the exception of volume control issue.MeasurementsI am going lớn present this in two parts. First part in this post is the usual set that you see from me. For the second part, since this DAC has S/PDIF input, I thought I use that on it, Topping D30 và Exasound E32 khổng lồ run a full suite of measurements. This is made possible by my Audio Precision Analyzer controlling the source signal which is not (easily) possible using the USB port (newer versions of AP support PC control but only using ASIO và not WASAPI). To lớn make sure the data is not overwhelming, I will put these extra measurements in follow on posts.Let"s dig right in with J-Test jitter & noise test:
Here we see declining harmonic distortion which is good (compared khổng lồ Fiio E10k) but there is a rise in noise floor proportional to lớn frequency after 16 Khz or so.Our current champ of budget DACs, the Topping D30, delivers a big blow khổng lồ DAC-X6 in this test:
I don"t know about you but lớn my eyes, there is no sine wave of any sort in the output đầu ra of FX-Audio DAC-X6. It is dominated by noise & who knows what else (in red). The cyan one is from Topping D30 which takes the crown again as the best of the three.So in summary, the Topping D30 continues khổng lồ outperform other DACs including the FX-Audio DAC-X6. In the three way comparison, Fiio E10K lands in the middle and the DAC-X6 easily finishes last.Story gets better though when we look at the headphone output:
As we see, courtesy of its external power nguồn supply, the FX-Audio DAC-X6 has higher output đầu ra both unloaded và loaded. Here is what that translates into as far as output đầu ra impedance:
So not too bad.I should mention that the Fiio E10 was oscillating at its peak đầu ra into my 33 ohm load. I had khổng lồ turn down the volume to "6" instead of max of "8" for the loaded measurement. The FX-Audio DAC-X6 on the other hand had no such problem so measurement is at its max output.I also tested the frequency response of the headphone output:
That response is very poor in high frequencies, dropping from 5 Khz on by as much as 5 lớn 7 dB. We should see a rule flat output. So better pair this with rather bright headphones to compensate.Listening TestI listened to the line output of the DAC-X6 against the Topping D30 through my Stax SRM-007t tai nghe amp driving their "Pro" headphones. Going through my playlist, I could not detect any obvious differences. But if I squinted enough, I thought the Topping sounded better. See the frequency response measurements for possible reason.I then switched to headphone listening & comparing the DAC-X6 against Fiio E10K. Without cấp độ matching, the DAC-X6 easily pulls ahead. Even with màn chơi matching, the DAC-X6 sounded noticeably better with the Sennheiser HD-650. There was more bass, more clarity, etc.Switching khổng lồ Hifiman HE-400i headphones, most of the differences went away. After listening for a while, I could still hear some improvement from the DAC-X6 but clearly this is a less demanding tai nghe than the HD-650 is. It is also more comfortable khổng lồ wear.Since the Topping D30 has no tai nghe output, it is out of the running.SummaryMeasured performance of the FX-Audio DAC-X6 is rather disappointing. It loses to similarly priced Fiio E10K & by a larger margin lớn Topping D30.On the other hand, its physical build is far better than the Fiio E10 và even Topping D30. Và its headphone output đầu ra which never gets distorted regardless of its dial position, is able to drive difficult headphones like the Sennheiser HD650.So if you want a DAC with headphone output for just pocket change, you have found it. The FX-Audio DAC-X6 provides a competent physical package, lots of inputs, & nice tai nghe amplifier.As a pure DAC, my recommendation remains lớn buy the Topping D30. Yes, it costs more but just cut back on morning coffee for a few days và you can afford it!
EDIT: Hardware tear down here: https://www.4566.vn/...are-teardown-of-fx-audio-dac-x6-usb-dac.2115/
AmirFounder, Audio Science ReviewFounder, Madrona DigitalContributing Editor, Widescreen đánh giá MagazineClick for My Technical BackgroundMy YouTube Channel
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So darn good in that front too. Many low cost USB DACs are limited lớn 96 KHz, not so here.Reliability was excellent under Roon without any failures using default settings. The only downfall it had was ignoring the volume control level in Roon. So if you rely on that for your volume màn chơi for your system, i.e. Have no pre-amp, then you can"t use this DAC. Hopefully this is a firmware limitation and can be fixed.As cranky as I can be, I can"t really find any faults here with the physical execution & overall functionality with the exception of volume control issue.MeasurementsI am going lớn present this in two parts. First part in this post is the usual set that you see from me. For the second part, since this DAC has S/PDIF input, I thought I use that on it, Topping D30 và Exasound E32 khổng lồ run a full suite of measurements. This is made possible by my Audio Precision Analyzer controlling the source signal which is not (easily) possible using the USB port (newer versions of AP support PC control but only using ASIO và not WASAPI). To lớn make sure the data is not overwhelming, I will put these extra measurements in follow on posts.Let"s dig right in with J-Test jitter & noise test:
Here we see declining harmonic distortion which is good (compared khổng lồ Fiio E10k) but there is a rise in noise floor proportional to lớn frequency after 16 Khz or so.Our current champ of budget DACs, the Topping D30, delivers a big blow khổng lồ DAC-X6 in this test:
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We have lower harmonic distortion in D30 and flat noise floor.Next let"s look at ability to lớn reproduce the lower two bits of 16-bit audio, attempting lớn approximate a sine wave:I don"t know about you but lớn my eyes, there is no sine wave of any sort in the output đầu ra of FX-Audio DAC-X6. It is dominated by noise & who knows what else (in red). The cyan one is from Topping D30 which takes the crown again as the best of the three.So in summary, the Topping D30 continues khổng lồ outperform other DACs including the FX-Audio DAC-X6. In the three way comparison, Fiio E10K lands in the middle and the DAC-X6 easily finishes last.Story gets better though when we look at the headphone output:
As we see, courtesy of its external power nguồn supply, the FX-Audio DAC-X6 has higher output đầu ra both unloaded và loaded. Here is what that translates into as far as output đầu ra impedance:
So not too bad.I should mention that the Fiio E10 was oscillating at its peak đầu ra into my 33 ohm load. I had khổng lồ turn down the volume to "6" instead of max of "8" for the loaded measurement. The FX-Audio DAC-X6 on the other hand had no such problem so measurement is at its max output.I also tested the frequency response of the headphone output:
That response is very poor in high frequencies, dropping from 5 Khz on by as much as 5 lớn 7 dB. We should see a rule flat output. So better pair this with rather bright headphones to compensate.Listening TestI listened to the line output of the DAC-X6 against the Topping D30 through my Stax SRM-007t tai nghe amp driving their "Pro" headphones. Going through my playlist, I could not detect any obvious differences. But if I squinted enough, I thought the Topping sounded better. See the frequency response measurements for possible reason.I then switched to headphone listening & comparing the DAC-X6 against Fiio E10K. Without cấp độ matching, the DAC-X6 easily pulls ahead. Even with màn chơi matching, the DAC-X6 sounded noticeably better with the Sennheiser HD-650. There was more bass, more clarity, etc.Switching khổng lồ Hifiman HE-400i headphones, most of the differences went away. After listening for a while, I could still hear some improvement from the DAC-X6 but clearly this is a less demanding tai nghe than the HD-650 is. It is also more comfortable khổng lồ wear.Since the Topping D30 has no tai nghe output, it is out of the running.SummaryMeasured performance of the FX-Audio DAC-X6 is rather disappointing. It loses to similarly priced Fiio E10K & by a larger margin lớn Topping D30.On the other hand, its physical build is far better than the Fiio E10 và even Topping D30. Và its headphone output đầu ra which never gets distorted regardless of its dial position, is able to drive difficult headphones like the Sennheiser HD650.So if you want a DAC with headphone output for just pocket change, you have found it. The FX-Audio DAC-X6 provides a competent physical package, lots of inputs, & nice tai nghe amplifier.As a pure DAC, my recommendation remains lớn buy the Topping D30. Yes, it costs more but just cut back on morning coffee for a few days và you can afford it!
AmirFounder, Audio Science ReviewFounder, Madrona DigitalContributing Editor, Widescreen đánh giá MagazineClick for My Technical BackgroundMy YouTube Channel
