# Flashing the ps audio perfectwave dac mkii? **URL:** \ **Category:** DACs\ **Created:** [November 12, 2020, 8:52pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055 "2020-11-12T20:52:07Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![maser](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@maser](https://forum.psaudio.com/u/maser)\ **Post date:** [November 12, 2020, 8:52pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/1 "2020-11-12T20:52:07Z")
I just picked up one, used and it is currently running version 2.4.6. How old is this version? Also, when I try to flash using the SD card slot in the back (pins pointing up) nothing happens. I don’t get a click when putting the card in, Power off, wait 10 seconds, power back on in the back, initiating message comes up and back to the default screen. what am I missing? thank you and sorry for the newbie questions. ---
**Author:** ![jamesh](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jamesh/32/3871_2.png) [@jamesh](https://forum.psaudio.com/u/jamesh)\ **Post date:** [November 12, 2020, 8:54pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/2 "2020-11-12T20:54:00Z")
I don’t remember the exact age of that version but it is pretty old. How big is the SD card you’re using? ---
**Author:** ![Stef](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/stef/32/66416_2.png) [@Stef](https://forum.psaudio.com/u/Stef)\ **Post date:** [November 12, 2020, 9:16pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/3 "2020-11-12T21:16:36Z")
Hallo, the 2.4.6 is not the latest; now is avaiable the 3.0.4 version; [https://www.psaudio.com/support/downloads/](https://www.psaudio.com/support/downloads/) but, in my case, was not working (Scott form PS Audio, very kind, said that they were fixing the update problems of the 3.0.4 version; maybe, now, they solved). Scott suggest to use an SD card that is 8GB or smaller and to format as FAT32, uploading files one by one. In my case, it worked. Bye 🙂 ---
**Author:** ![maser](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@maser](https://forum.psaudio.com/u/maser)\ **Post date:** [November 12, 2020, 9:39pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/5 "2020-11-12T21:39:45Z")
It was the one file at a time thing that did it. I tried the card (4GB) and still nothing and last thing to try, one file at a time and bingo, it is flashing the unit. thank you. ---
**Author:** ![Stef](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/stef/32/66416_2.png) [@Stef](https://forum.psaudio.com/u/Stef)\ **Post date:** [November 12, 2020, 9:43pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/6 "2020-11-12T21:43:21Z")
Great! Now, enjoy the music 🙂 👋 ---
**Author:** ![chris5](https://avatars.discourse-cdn.com/v4/letter/c/f19dbf/32.png) [@chris5](https://forum.psaudio.com/u/chris5)\ **Post date:** [November 13, 2020, 12:48pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/7 "2020-11-13T12:48:32Z")
Very odd, any explanations why one file at a time? …unless the files weren’t unzipped and copying one at a time was forcing an unzip on the fly ---
**Author:** ![maser](https://avatars.discourse-cdn.com/v4/letter/m/87869e/32.png) [@maser](https://forum.psaudio.com/u/maser)\ **Post date:** [November 13, 2020, 1:11pm UTC](https://forum.psaudio.com/t/flashing-the-ps-audio-perfectwave-dac-mkii/20055/8 "2020-11-13T13:11:00Z")
I cannot explain, it doesn’t make sense to me. All I know, and maybe it was coincidence, is that I formated the 4GB card and moved all the files together to the card from an unzipped folder, tried it and nothing, I then deleted all the files and moved one by one to the card and bingo, the flash started the second I turned the unit back on. I am now running the latest version. Side note, this DAC is amazing, it replaces a Mcintosh D150. It is more details with a sound stage that completely fills the room, also amazing, well controlled bass. Couldn’t be happier.