dam1941 - Next Gen Discrete R-2R Sign Magnitude 24 bit 384 Khz DAC module

[Alessandro Dalto]

Rule of the thumb using transformers: if you want lower distortion, the transformer impedance must be at least 4-5 times grater, than source impedance.
Listed 1:1 transformers are "high" primary voltage, high impedance line input ones.

I didn't know it, thanks

 

[Alessandro Dalto]

I've a question, in parallel single ended mode (313ohm, 2.6v), it can directly drive an integrated amplifier with input impedance of 10k or 100kohm (pot impedance )? Or is it desirable to have a lower output impedance to to get a better impedance matching hence better sound.
Tell me yours, thank you.

 

[analog_sa]

No impedance matching is needed even with 600ohm output impedance. Which does not mean than an active preamp between dac and power amp would not make the sound preferable subjectively.

 

[wanders]

Anyone know the part number for the rca jack on the dam1941 pcb? I'd like to be able to match it.

Thanks

 

[soekris]

Anyone know the part number for the rca jack on the dam1941 pcb? I'd like to be able to match it.

Thanks

Aec Connectors RJ-255ABKPL(PF)G-TEF-BK, they're hard do find, I get them directly from the Taiwanese manufacturer, but some speciality audio parts store carry them, like:
https://www.audiophonics.fr/en/rca-...inlet-rca-for-ic-gold-plated-pair-p-8156.html

 

[wanders]

Aec Connectors RJ-255ABKPL(PF)G-TEF-BK, they're hard do find, I get them directly from the Taiwanese manufacturer, but some speciality audio parts store carry them, like:
https://www.audiophonics.fr/en/rca-...inlet-rca-for-ic-gold-plated-pair-p-8156.html

Thanks

 

[diamonddust]

Is it possible to disable input auto sensing?

 

[soekris]

Is it possible to disable input auto sensing?

Please see manual page 8

 

[wanders]

Just finished building the Power, Buffer, and Display boards and assembling the dam1941 system. Everything is working fine and sounds great. I won't be using the head phone feature. Am I correct in assuming that it is safe to cut-off the display board at a point beyond the mounting hole at 6.695"?

Thanks

 

[soekris]

Just finished building the Power, Buffer, and Display boards and assembling the dam1941 system. Everything is working fine and sounds great. I won't be using the head phone feature. Am I correct in assuming that it is safe to cut-off the display board at a point beyond the mounting hole at 6.695"?

Thanks

Yes.

 

[wanders]

Thanks

 

[wanders]

I'm ordering front and rear panel face plates for the assembled DAC. I'd appreciate part numbers for the TOS and USB2 jacks so I can get accurate size & cut-out specs. The RCA and BNC information was provided preciously.

Thank you

 

[soekris]

Everlight PLR135/T10
Amphenol UE27-BC54-13H

 

[diamonddust]

I'm ordering front and rear panel face plates for the assembled DAC. I'd appreciate part numbers for the TOS and USB2 jacks so I can get accurate size & cut-out specs. The RCA and BNC information was provided preciously.

Some time ago Soren posted the the bagplate of the Soekris dac1541 which as the same cut out size. I've attach the Autocad dwg with those info. I haven't made a case yet, they should be correct but in case double check them.

 

[wanders]

That's perfect; sorry; I didn't see it before.

Thanks to both.

 

[patrik96]

HI, is the 1021full_124.skr is good for DAM1941?

 

[lounge]

After connecting the serial interface, I did a set mode = parallel, then I went out and turned off the dac. I turned the dac back on, but I'm not sure if it's in parallel mode, is there any way to check if it's switched to parallel mode?

 

[Blitz]

One question: How can I do a true factory reset ? I realized that my set=filter... Commands are still there after flashing firmware/filter package 1.23. So, this is not a complete erase and rewrite...

Backround of my question: I played around with some cuatom dilters and strange enough i got now a highly attenuated signal, but only in sampling frequence 96khz.

My first Dam1941(older one) does not behave like that, so i want to be sure, that any misbehaving custom filter setting are erased and that I get the same volume behavior no matter which sample frequency i feed the 1941 with.

 

[soekris]

After connecting the serial interface, I did a set mode = parallel, then I went out and turned off the dac. I turned the dac back on, but I'm not sure if it's in parallel mode, is there any way to check if it's switched to parallel mode?

Enter uManager, do command "set" without parameters.

 

[soekris]

One question: How can I do a true factory reset ? I realized that my set=filter... Commands are still there after flashing firmware/filter package 1.23. So, this is not a complete erase and rewrite...

Backround of my question: I played around with some cuatom dilters and strange enough i got now a highly attenuated signal, but only in sampling frequence 96khz.

My first Dam1941(older one) does not behave like that, so i want to be sure, that any misbehaving custom filter setting are erased and that I get the same volume behavior no matter which sample frequency i feed the 1941 with.

Reload 1.20 stock 4K filters, available on soekris website.