[Setmagic]

Thanks for the post, but I have tried multiple times but I can't seem to update my firmware version. I have the reversed L/R issue with my z4

Did You unpack the file .bin from ZIP?
System showing white screen with tiny letters informing about process?

 

[iLachrymose]

I have to unpack the .bin itself? sorry haven't tried. let me try now

 

[iLachrymose]

Hmm I can't seem to unpack the .bin. what app are you using to unpack the .bin file?

 

[Setmagic]

Hmm I can't seem to unpack the .bin. what app are you using to unpack the .bin file?

Not bin but ZIP
Do You done all steps.
Save z4app.bin in SD card -> power UP Z4 -> White screen will be show with information just wait until finish working -> device should be automatic restarted
Erase z4app.bin from SD after all operation.

 

[iLachrymose]

Hmm I can't seem to unpack the .bin. what app are you using to unpack the .bin file?

Not bin but ZIP
Do You done all steps.
Save z4app.bin in SD card -> power UP Z4 -> White screen will be show with information just wait until finish working -> device should be automatic restarted
Erase z4app.bin from SD after all operation.

yes I have done them all. I have a 128gb sd card empty. does it need to be in a folder?

 

[Setmagic]

@iLachrymose Nope, just formatted SD card FAT or exFAT

Hows now?
Something shows when You boot up device?

 

[cattlethief]

As I told you the R3 Pro is broken and the R5 Saber was just a loan. But, who knows, the Acmee MF02s may come home at some point and I'm sure I'll compare it to the Z4.
Will the MF02s have the respect I'm looking for from IEMS? The MF01 didn't have it but I still like it. It's hard to stay consistent. In this respect the Z4 improves on the MF01.

I think you will enjoy the MFO2s the UI needs improving but the SQ is best in its class and I prefere it to the AK SR15 and Ibasso DX160

 

[Setmagic]

Sabre ES9038 is one of the best delta-sigma ever made, they use a unique technique for signal processing.
All they needs is good application.
I heard a lot of good things about MF02s @cqtek

I will push to the limit Z4 and compare with modded 4497 in DSDs.

I will replace some parts using:
Nichicon Audio KA 220uF and 100uF
Rubicon ZLH ultra low ESR 1000uF
Texas Instrument's LDO5907 3.3V
MLCC PDC 150, 100, 47uF,
and MuRata 22uF, 1uF, 100nF
Panasonic Stacked Foil caps 56nF.

 

[Syncaine]

In the new firmware version, there is a problem with fast forwarding the track. The progress bar moves quickly and does not stop anymore.

 

[Setmagic]

In the new firmware version, there is a problem with fast forwarding the track. The progress bar moves quickly and does not stop anymore.

This problem is caused by hardware due to bad calibration of physical joystick. Buttons just pressed accidentally. Pressing right and down, same time, run auto fast-forward. Up-rigt start playing from this moment, up-down cancel operation and play from beginning. You can play during seeking from last remember position by pressing middle button and don't disturb auto seeking.
I have modified buttons and this is easy for me.

 

[Syncaine]

My measurement:

 

[Setmagic]

My measurement:

Looks excellent
What kind of sound card did You use?

 

[Syncaine]

Looks excellent
What kind of sound card did You use?

MOTU M4 + 30 ohm load

 

[Setmagic]

MOTU M4 + 30 ohm load

Greate stuff. You can measure for 300 ohm as well?

Main problem with based on opa1622 circuits is design for low impedance usage. In datasheet it is even 600 Ohm but it's a number. To work best with heavy loads need to be set up in parallel. Single 1622 isn't capable to drive it in proper way.

How about 2 opa1622?
I know good DIY amp with 4x 1622 in parallel at the end of headphone stage is capable to drive 300 and 600Ohm in proper way.

@edit
For comparison this is stock previous flagship from Zishan DSDs AK4499.
Mesurment by @slavalun translated from Russian.

1) stock


2) With very complex and expensive slavalun MOD [source from Player.ru]

 

[Cygx1]

Hi guys, I have just got my Z4 and it makes this horrible clicking noise only with DSD 256! With other sample rates and formats it works just fine. I was wondering if anyone had the same problem and if you think its just with the firmware or is my device defective and should be returned?