[Whitigir]

Since I haven't seen block diagram of WM1Z internal design, how much is there of an overlap between SE and BAL ckts? Typically, on many other DAPs, SE is a subset of BAL, thus I don't bother to put as many hours of burn-in on SE as I do on BAL. And, most of my IEMs have 4.4mm terminated cables anyway. Got 60hrs on BAL now, mostly using iBasso burn-in load dongle, and on my way to get to 200hrs golden mark so I can start analyzing and comparing the sound. Thus curious if it will cover 3.5mm as well?

On Walkman , the balanced out is different than single ended out . You will need to burn in both

 

[Sonywalkmanuser]

@Whitigir

Just a question, if assuming someone only uses the 4.4mm balanced jack for music playback.

is it necessary to burn in the 3.5mm jack? Will the unburn side cause any sound quality issues to the balanced end?

 

[Whitigir]

@Whitigir

Just a question, if assuming someone only uses the 4.4mm balanced jack for music playback.

is it necessary to burn in the 3.5mm jack? Will the unburn side cause any sound quality issues to the balanced end?

Not necessarily to burn in 3.5 if you don’t need it. The way S-Master HX is configured, it has 4 active signals, and when going toward balanced direct digital amplifications, it gets summed up to be L+, L- and R+, R-

On the SingleEnded , it is basically only using (2 signals) L+ and R+ , but the way Walkman uses Class D output, Sony has to configure another output (1/2 bridge) for the 3.5mm. This amplification circuitry is what needing the burn in, not the S-Master, as all 4 is already used from 4.4mm

 

[twister6]

Not necessarily to burn in 3.5 if you don’t need it. The way S-Master HX is configured, it has 4 active signals, and when going toward balanced direct digital amplifications, it gets summed up to be L+, L- and R+, R-

On the SingleEnded , it is basically only using (2 signals) L+ and R+ , but the way Walkman uses Class D output, Sony has to configure another output (1/2 bridge) for the 3.5mm. This amplification circuitry is what needing the burn in, not the S-Master, as all 4 is already used from 4.4mm

Vince, is there a block diagram of this?

 

[Sonywalkmanuser]

Vince, is there a block diagram of this?

Found this only diagram from Sony that mentions BTL

source:
https://today.line.me/tw/v2/article/3zELKr

 

[xryptic]

Did you buy it from 313 or is it possible to buy it online, say from Sony SG’s website? If the latter is possible, could you please share the link? Thank you in advance

I had to pop into the Sony care section physically to inquire and order at the spare parts counter. Also ordered spare replacement cables for my IER-Z1R.

 

[Sonywalkmanuser]

@twister6

I assume you are intending to write a review on the WM1ZM2, If you haven't read this article, I believe it will be useful to you:

https://www-sony-jp.translate.goog/...=ja&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

 

[Sonywalkmanuser]

@Whitigir

It seems that Direct Digital Class D Amps like S-Master HX is very sensitive to clock jitters, to the point where it can affect it's dynamic range and full scale THD performance.

https://www.edn.com/digital-input-c...aditional-class-d-and-simplify-system-design/

Jitter Tolerance and Clock Generation​

Digital-input Class D audio amplifiers do, admittedly, present a new challenge for clock jitter. For good audio quality most digital-input amplifiers require fairly low levels of jitter on BCLK or PDM_CLK. The jitter tolerance is often not quoted in the data sheet; when jitter tolerance is quoted, the typical specification is ~200ps of RMS jitter. High levels of clock jitter will typically degrade either the amplifier’s dynamic range or the full-scale THD+N performance.

https://www.infineon.com/dgdl/an-1071.pdf?fileId=5546d462533600a40153559538eb0ff1

 

[MarkParity]

User review from Taiwan PTT:
https://ptt.reviews/Headphone/M.1651152735.A.6C0

The review seems to get a bit lost in translation.

"Well done Sony" I got that bit.

 

[Sonywalkmanuser]

The review seems to get a bit lost in translation.

"Well done Sony" I got that bit.

He's basically explaining his opinions on the various DSP and sound settings of the WM1AM2.

 

[Redcarmoose]

@Whitigir

Just a question, if assuming someone only uses the 4.4mm balanced jack for music playback.

is it necessary to burn in the 3.5mm jack? Will the unburn side cause any sound quality issues to the balanced end?

Not necessarily to burn in 3.5 if you don’t need it. The way S-Master HX is configured, it has 4 active signals, and when going toward balanced direct digital amplifications, it gets summed up to be L+, L- and R+, R-

On the SingleEnded , it is basically only using (2 signals) L+ and R+ , but the way Walkman uses Class D output, Sony has to configure another output (1/2 bridge) for the 3.5mm. This amplification circuitry is what needing the burn in, not the S-Master, as all 4 is already used from 4.4mm

I would at least make the statement that the 3.5mm on the original Signatures 1Z/1A offered a slightly alternate sound using the 3.5mm instead of 4.4mm. So it was nice to have for that.

The 3.5mm on the original series had a softer approach which appealed to some as their only way to go. The more contrasting 4.4mm was a totally different experience!

 

[Whitigir]

I would at least make the statement that the 3.5mm on the original Signatures 1Z/1A offered a slightly alternate sound using the 3.5mm instead of 4.4mm. So it was nice to have for that.

Yes, they definitely do sound different

 

[metaljem77]

I had to pop into the Sony care section physically to inquire and order at the spare parts counter. Also ordered spare replacement cables for my IER-Z1R.

Much appreciated!

 

[HappySheep]

Finally got my WM1AM2!
Now wondering if there is any solution to update to Japanese fw.

 

[nc8000]

Finally got my WM1AM2!
Now wondering if there is any solution to update to Japanese fw.

Why would you want to do that ?