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Does anyone have first hand experience whether the overheating issue is resolved in new production units at DSD512 using the HW as shipped (without additional fans) and original FW? If so, would you let us know please?

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The overheating problem has been solved by placing some chokes on the bottom of the DAC's pcb.

All DA004 now ship in this mode. I own one. 

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On 9/17/2017 at 7:20 PM, bibo01 said:

With DSD (64, 128, 256) what is the lowest DPLL you can have on your device?

 

With DSD what IIR filet do you use? 40K, 50K, 60K or 70K? 

 

good morning bibo01, did you ever manage to gather info on this?

 

I have been playing with the bandwidth settings for a while now, whenever I think about it anyway... and have found that even when set to 15, there are times when the DAC will lose lock on high rez files--both flac and dsf

 

That has me wondering if there isn't some other settings magic that I am missing...

 

thanks and any thoughts appreciated,

 

 

rikm

 

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2 hours ago, rikm said:

 

good morning bibo01, did you ever manage to gather info on this?

 

I have been playing with the bandwidth settings for a while now, whenever I think about it anyway... and have found that even when set to 15, there are times when the DAC will lose lock on high rez files--both flac and dsf

 

That has me wondering if there isn't some other settings magic that I am missing...

 

thanks and any thoughts appreciated,

 

 

rikm

 

I always output at DSD256 with BW set at 11. I never have unlocks. I find it odd that you do even in PCM with BW set at 15. Perhaps you should check your house voltage. I say this because I use to have this problem related to voltage causing unlocks even when no music was playing.

 

With DSD you can use 70K as filter. 

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14 hours ago, bibo01 said:

I always output at DSD256 with BW set at 11. I never have unlocks. I find it odd that you do even in PCM with BW set at 15. Perhaps you should check your house voltage. I say this because I use to have this problem related to voltage causing unlocks even when no music was playing.

 

With DSD you can use 70K as filter. 

 

good morning bibo01 and thanks for your reply,

 

...well there are 2 layers of power conditioning in place and the DSD filter is set to 70k at the moment, although I have tried the others as well...am wondering now if it is overheating...it usually plays for an hour or so and then static until the USB source is stopped and restarted...maybe a test with a USB to I2S converter should be next...

 

Do you know of an easy way to ID the modified units from the original production runs?

 

thanks again, and any thoughts welcome

 

 

 

 

 

 

 

 

 

 

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11 hours ago, rikm said:

...well there are 2 layers of power conditioning in place and the DSD filter is set to 70k at the moment, although I have tried the others as well...am wondering now if it is overheating...it usually plays for an hour or so and then static until the USB source is stopped and restarted...maybe a test with a USB to I2S converter should be next...

I doubt that it's overheating. Newer LKS units have solved that problem. You mention "static". I have the same problem because I have upgraded Amanero firmware for Linux DSD native playback and it's still a bit unstable, so I have to restart playback too from time to time. Have you upgraded firmware too?

 

Quote

Do you know of an easy way to ID the modified units from the original production runs?

If you are referring to the solved heating problem, I do not know unless you open the DAC and look underneath the mainboard. Perhaps, if you supply serial number, LKS Audio will be able to tell you which run it is. 

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2 hours ago, bibo01 said:

I doubt that it's overheating. Newer LKS units have solved that problem. You mention "static". I have the same problem because I have upgraded Amanero firmware for Linux DSD native playback and it's still a bit unstable, so I have to restart playback too from time to time. Have you upgraded firmware too?

 

If you are referring to the solved heating problem, I do not know unless you open the DAC and look underneath the mainboard. Perhaps, if you supply serial number, LKS Audio will be able to tell you which run it is. 

 

...well it's been playing .dsf files all day without phase lock problems thru an XMOS bridge to the I2S port, so it doesn't look like an overheating issue any more--even tho my unit dates back to July--but maybe something directly related to the Amanero board...have been periodically reducing the BW setting from 15, it is now at 8 and have not had any sign of static

 

...have also flashed the Amanero firmware--to the 2003BE build for linux--and am interested to hear that you are seeing what sounds like similar but less severe USB/DPLL behavior...so maybe it's the firmware then, if not a faulty Amanero module, because the PL static issues definitely preceded the firmware update

 

Also sent an email to the bleerock address this AM, maybe they will have some info to share

 

 

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Out of interest, can anyone explain why the 004 can struggle with a lock initially, but then be ok after warm up? I don't use my unit much these days, but I remember that I would have to leave it on 15 for about 5 minutes after startup, and then I could change it to 1.

 

I only play Redbook, for the record.

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I ordered one from Senzhen Audion through Amazon.  I found that the coaxial plug is larger than standard size and won't fit my cable. My CD player only has coaxial output. This is a big problem for me. Even if I can manage to get a cable with large plug, it will only fit the DA004 but won't fit my CD player or any other source with standard coaxial plug size. I am wondering why this hasn't been mentioned. Is there a solution to this problem?

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I found a cable in the house that is similar to the one below. I don't remember where and when I got mine. It's not Amazon brand but has similar cut in the connector that makes it expandable. This is the first time I ever have this issue so I was a little overly worried initially, especially the DAC is from a overseas vendor and it's not inexpensive.

 

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Seems odd. I've had two MH-DA 003's and still own an MH-DA 004 and have never experienced cable issues. Maybe it's something to do with the latest batch?

 

FWIW, I'll be putting mine on e-bay shortly. Lovely unit, but it has been replaced recently with Chord M-Scaler/Dave. (Gives them a good run for their money though, and at a fraction of the price.)

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