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Okto dac8 stereo DAC Review

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I suppose you could prove that by plugging the SINAD numbers of your dongle & amp vs the DAC in this review combined with the same amp. You'd plug the numbers into the calculator at the bottom of this page and compare the result:
http://www.sengpielaudio.com/calculator-thd.htm
Or I can by just measuring it myself with my analyzer. For measuring any current amplifier on the market I can use a $149 iPhone 7 running this app:

https://apps.apple.com/us/app/audio-function-generator-pro/id895074703

$20 DAC, and $50-100 headphone amp as the source. That's the app I used to generate the 115 SINAD from the $20 Meizu hifi DAC. I can connect this setup to the Purifi Eval 1 amp kit and match the 108dB SINAD results in Amir's Purifi amp review from the amp binding posts at 5w output.
 

Robbo99999

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Or I can by just measuring it myself with my analyzer. For measuring any current amplifier on the market I can use a $149 iPhone 7 running this app:

https://apps.apple.com/us/app/audio-function-generator-pro/id895074703

$20 DAC, and $50-100 headphone amp as the source. That's the app I used to generate the 115 SINAD from the $20 Meizu hifi DAC. I can connect this setup to the Purifi Eval 1 amp kit and match the 108dB SINAD results in Amir's Purifi amp review from the amp binding posts.
You might have to put the numbers and information side by side (in one post) with the 'calculation' to show the point more clearly to me (and maybe others).
 

raif71

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Feels a bit like a hack, doesn’t it? I thought the whole DAC integrated with the Pi like a “hat”. I think they might have run into issues integrating the Pi that way. Should work just as well though. Good thing there are 2 USB inputs.
Yup, it's beneath the Pi to be paired with such a DAC :p
 
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Well, unless the analogue output stage is deliberately colored, or there are unintended design mistakes made anywhere in a DAC, as long as the thresholds are kept below audibility, how can a DAC sound different? (..)
That's a legitimate question. Unfortunately, I don't have the definitive answer. But I am listening through a high res system for some hours now without any listening fatigue and I am pretty sure the Okto DAC8 contributes a lot to this. I had some other medium priced DAC's before in this system which didn't provide the same listening pleasure. Except my (vintage) Assemblage DAC 2.6 Signature (20 years old) but unfortunately this unit failed some time ago. This is, like the DAC8, a well designed unit too, also regarding the analogue circuit and power supply. And it's an R2R DAC of course!

But yes, I don't think a few dB's more or less SINAD are of any importance in practice.
 
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You might have to put the numbers and information side by side (in one post) with the 'calculation' to show the point more clearly to me (and maybe others).
Since I bought my analyzer I prefer to just take the actual measurements. I can measure up to 128 SINAD with my setup.
 

pozz

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For example don't you think this sub $100 headphone amp can drive any speaker amp to clipping?

https://www.audiosciencereview.com/...ents-of-new-jds-labs-atom-headphone-amp.5262/

Combine that with the $149 iPhone 7, and $20 Meizu, and you can drive the Benchmark amp to clipping, and achieve the same measured results Amir did in his review of the amp from the amp binding posts.

Better yet go overboard and spend $169.99 and you can drive any amp with up to 40vPP output balanced.

https://shenzhenaudio.com/products/...-amplifier-combined-with-topping-d50s-d50-p50
 
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Anybody know what kind of volume control it uses? What DAC chip and how many? Is it fully balanced?
ES9028pro DAC chip. Balanced outputs only. 32 bit internal software volume control (so no side effects at all when listening at low levels. Also because of the extraordinary high dynamic range).
 

Matias

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It was kindly sent to me by the company for review.
For disclosure, does this mean it is yours to keep or sell as you wish? Or do you have to return it?
 

BillH

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For example don't you think this sub $100 headphone amp can drive any speaker amp to clipping?

https://www.audiosciencereview.com/...ents-of-new-jds-labs-atom-headphone-amp.5262/

Combine that with the $149 iPhone 7, and $20 Meizu, and you can drive the Benchmark amp to clipping, and achieve the same measured results Amir did in his review of the amp from the amp binding posts.

Better yet go overboard and spend $169.99 and you can drive any amp with up to 40vPP output balanced.

https://shenzhenaudio.com/products/...-amplifier-combined-with-topping-d50s-d50-p50
Welcome to ASR!:)
I recommend you start a thread about your measurement system and the device you are recommending rather than burying it in a thread that is about the best DAC in the world.;)
How will anyone find your content buried here where it doesn't belong?
 
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Welcome to ASR!:)
I recommend you start a thread about your measurement system and the device you are recommending rather than burying it in a thread that is about the best DAC in the world.;)
How will anyone find your content buried here where it doesn't belong?
thanks! The point is the best Dac in the world is only as good as the best amp in the world. And currently if you’re a speaker listener, $20 can get you a Dac that can achieve the best possible performance from any speaker amplifier on the market today. Most people on this forum don’t realize this. Which is why it’s important from an educational perspective. As this is a science forum, it’s beneficial for all members to understand what actually matters, and what will result in pissing money in the wind, for absolutely no measurable benefit.
 
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amirm

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Thread Starter #114
For disclosure, does this mean it is yours to keep or sell as you wish? Or do you have to return it?
I had to return the last one so I am assuming the same is true of this one.
 
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amirm

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Thread Starter #116
thanks! The point is the best Dac in the world is only as good as the best amp in the world. And currently if you’re a speaker listener, $20 can get you a Dac that can achieve the best possible performance from any speaker amplifier on the market today. Most people on this forum don’t realize this. Which is why it’s important from an educational perspective. As this is a science forum, it’s beneficial for all members to understand what actually matters, and what will result in pissing money in the wind, for absolutely no measurable benefit.
We are educated. Please don't keep discussing other products in this thread. This is not a dongle we are talking about. It is a desktop DAC with multiple inputs, volume control, remote control, display, etc.
 
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We are educated. Please don't keep discussing other products in this thread. This is not a dongle we are talking about. It is a desktop DAC with multiple inputs, volume control, remote control, display, etc.
I think most people are aware of what this product is. Just not aware the same performance can be achieved for $20 in a speaker based setup. I bet 90% of your readers didn't know this. Which is why they actually care when a DAC measures better than 114 SINAD. I was just using the dongle as an example. But there's 1000 other sub $100 DAC's that can be used to make the same point.
 
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Thread Starter #118
I think most people are aware of what this product is. Just not aware the same performance can be achieved for $20 in a speaker based setup.
No, if they have been here for five minutes, they know. Even if they didn't, they know after your first five posts saying that.

Review threads are not for argumentative points. Feel free to create another thread to discuss that.
 

VeerK

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I’m curious if the 8 channel version has seen an improvement/revision, not that 118 to 122 is going to be audible, but that jitter and multi tone looks amazing
 
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I’m curious if the 8 channel version has seen an improvement/revision, not that 118 to 122 is going to be audible, but that jitter and multi tone looks amazing
If I am right Okto Research stated sometime ago somewhere that the SINAD of the DAC8PRO indeed has been improved by some 2 dB since the pre production sample reviewed here (so now 120 dB). However, in the current manual 119 dB is mentioned (see their website).
 

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