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Review and Measurements of Okto DAC8 8Ch DAC & Amp

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This DAC appears to have promise but I wonder if early text mentioning the possibility of bumping up the output voltage to15.x has been tabled? The current User Manual only mentions 4.1vRMS on the Analog Outputs. For most folks this is probably more than enough but for others doing heavy room corrections..etc its probably very shy of what is needed to make up for the volume loss after corrections depending on various Amplifier gain..etc.

I've got Benchmark DAC3 with -10db "Pad" in place which is said to be about 5.8 vRMS and its just barely enough output to reach a satisfying listening level of about 100db or so in room at chair (it is a big room though FWIW).

This is based on roughly a -20db cut off of the headroom due to Audiolense corrections..etc

Only having 4.1 vRMS is a deal killer for me personally otherwise I might be all over this unit. I also wonder how a big boost in output level would effect the current posted measurements. Would it be just as impressive with say double or triple the output voltage?

(5.8/4.1)^2 = 2

3dB of reduced output is a deal breaker to you? It sounds to me that you need more gain from your amplifier.

Also, +20 dB on your room correction curve is quite agressive IMO. At 100dB at your listening position you would be pushing a lot of power at those frequencies. I dont know what kind of equipment you are using of course.
 

cjf

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(5.8/4.1)^2 = 2

3dB of reduced output is a deal breaker to you? It sounds to me that you need more gain from your amplifier.

Also, +20 dB on your room correction curve is quite agressive IMO. At 100dB at your listening position you would be pushing a lot of power at those frequencies. I dont know what kind of equipment you are using of course.
That's interesting. I'm usually told my amp has too much Gain @ 26db

In my case yes, losing 3db from what I have now would be too much to bare. Every tells me to turn it up, I tell them it already is :)

Already running between -10 dbfs up to -5dbfs on Roon's DSP volume control as it is with current settings to produce output mentioned. I could of course go all in and crank it to 0dbfs or remove the -10db jumper from DAC3 but I'm not feeling that brave just yet.
 

cjf

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This dac can be ordered with custom output-gain, if I remember correctly.
I thought I read that too but interestingly enough there is no official mention of it anywhere in documentation. I would still be very curious to see if the impressive measurements would still hold true when bumping up the output gain.

Thats probably something that should be considered when trying to compare it to other DAC's who have much higher output but still very impressive measurements
 

cjf

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I would like to know a bit more about that AES/EBU Output on the DAC8 Pro as well. Is this a straight pass-thru interface that I could, for example, route USB Ch1 & 2 out thru this interface (instead of being mapped to one of the Okto Analog XLR outs) to then feed a different DAC downstream? If so, this may solve my concern with the output gain in default form being too low cause I could still use my Benchmark DAC3 to feed my two front channels like I do today.

I don't want to sound like I'm being negative towards the Okto because that is not my intention. I do like the fact that is supports Linux in a driverless fashion which seems to be rare these days for one reason or another. Some devices claim to be USB 2.0 compliant but yet somehow dont work with Linux. Baffling!
 

Neddy

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The manual states:
"In the Pure USB mode, AES/EBU output is operational and transmits channels 1 and 2 of the USB
audio data."

I intend to use this feature.
 

Bisocri

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ciao, non inquinerei il forum con problemi personali riguardanti il dac in questione. Ho effettuato l'ordine il 30 settembre. siamo a fine dicembre e ho provato a scrivere a Pavel of Okto informazioni di ricerca, ma a una e-mail di 3 giorni fa non ho ricevuto alcuna risposta .. un amico con un precedente ordine di estrazione a una e-mail di 10 giorni fa non ha ottenuto una risposta. ... sono trascorsi più di 2 mesi dall'ordine ... per curiosità, ma chi ha ricevuto il tuo dac quando hai effettuato l'ordine?
 

g29

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ciao, non inquinerei il forum con problemi personali riguardanti il dac in questione. Ho effettuato l'ordine il 30 settembre. siamo a fine dicembre e ho provato a scrivere a Pavel of Okto informazioni di ricerca, ma a una e-mail di 3 giorni fa non ho ricevuto alcuna risposta .. un amico con un precedente ordine di estrazione a una e-mail di 10 giorni fa non ha ottenuto una risposta. ... sono trascorsi più di 2 mesi dall'ordine ... per curiosità, ma chi ha ricevuto il tuo dac quando hai effettuato l'ordine?
Translation:

hello, I would not pollute the forum with personal problems concerning the dac in question. I placed the order on September 30th. we are at the end of December and I tried to write to Pavel of Okto search information, but to an e-mail of 3 days ago I have not received any reply .. a friend with a previous drawing order to a 10-day e-mail does not get an answer. ... more than 2 months have passed since the order ... out of curiosity, but who received your dac when you placed the order?
 
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I got this reply from Pavel on November 8.
Another month on and my DAC has still not been delivered.

Hi David,

my apologies for letting you wait for a reply. I understand it is getting long and I am sorry for that. Dealing with a backlog of pre-orders is taking us more time than expected, but we are making deliveries in a steady pace and should be able to ship your DAC8 PRO in 2 weeks. I hope it is soon enough.

Thank you for your patience
Pavel, Okto Research
 
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Joined
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Really looking forward to the DAC8 Stereo reveal and subsequent measurements and analysis here :)
 

rajapruk

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Question for you guys already received a production unit:
Any pops/cracks or other unexpected sounds on startup/shutdown/sample-rate-change or something like that?
Also what happens if you pull the power to the unit while on, any pop then?
(I have precious compression-drivers directly connected to amp without passive network, and very high sensitivity)
 
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