New- Zishan Z1 DSD player thread

[Dark Helmet]

Anyone ever try one of these?

http://penonaudio.com/XunSound-XS-01

 

[noknok23]

Anyone ever try one of these?

http://penonaudio.com/XunSound-XS-01

there is a whole thread here--

btw you might get better result posting your request here

 

[Dark Helmet]

there is a whole thread here--

btw you might get better result posting your request here

Thanks.

 

[hqssui]

Anyone ever try one of these?

http://penonaudio.com/XunSound-XS-01

I have shared my impression here.
https://www.head-fi.org/f/threads/obscure-chinese-daps.720512/page-194#post-13541948

 

[DBaldock9]

I've added the list of Opamps that I've accumulated, to the end of the "Headphone Amp Inventory" on my profile.
That way, I have an easy to find reference location.

*** Opamps to use in Zishan Z1 & Walnut v2 ***
01.) Dual opamp, made from 2x ADA4627-1BRZ mono opamps
02.) Dual opamp, made from 2x AD825AR V3 mono opamps
03.) Dual opamp, OPA2604AP
04.) Dual opamp, OPA2134PA
05.) Dual opamp, LME49720HA (TO-99 round metal case)
06.) Dual opamp, LME49720NA
07.) Dual opamp, PHILIPS NE5532N (Vintage - mid-90s)
08.) Dual opamp, TI NE5532P (stock in Z1 & v2)
09.) Dual opamp, LF353N (purchased in the mid-80s)
***

 

[NymPHONOmaniac]

I've added the list of Opamps that I've accumulated, to the end of the "Headphone Amp Inventory" on my profile.
That way, I have an easy to find reference location.

*** Opamps to use in Zishan Z1 & Walnut v2 ***
01.) Dual opamp, made from 2x ADA4627-1BRZ mono opamps
02.) Dual opamp, made from 2x AD825AR V3 mono opamps
03.) Dual opamp, OPA2604AP
04.) Dual opamp, OPA2134PA
05.) Dual opamp, LME49720HA (TO-99 round metal case)
06.) Dual opamp, LME49720NA
07.) Dual opamp, PHILIPS NE5532N (Vintage - mid-90s)
08.) Dual opamp, TI NE5532P (stock in Z1 & v2)
09.) Dual opamp, LF353N (purchased in the mid-80s)
***

Really nice! So, we can use this player as a stand alone amp too right? Did the amp sound is clear? Just wanna be sure before finally ordering it!

 

[noknok23]

@DBaldock9 will you describe your impressions as well?

 

[knudsen]

I've stumbled upon the post here, where "Uncle Eric" says that

"When it comes to headphones, you generally want an output impedance lower than the headphone impedance. This is called the 'Damping Factor'."

and also

"an output impedance higher than the headphone impedance loses control of the bass".

Afaik the z1 has a 100 Ohms resistor in the signal path just before the output, so output impedance will be at least 100 Ohms. Since I use earbuds with an impedance of 32 Ohms that does'nt sound too good.

So would it/could it be beneficiary to change that tiny thing (100 Ohms SMD resistor) to maybe 10 or 20 Ohms? Or have I misunderstood everything?

There is a guy at a russian forum here who has changed it for 10 (bullit no. 4), but he's doing all kinds of crazy stuff so I don't know if the resistor alone is meaningful..

 

[noknok23]

Hooo that is why some of my low impedance earbuds sounds a bit crappy on it! I don't think it's that bad though cause I tried multi driver iem that sounds fine however oO.
Don't really have knowledge about it but I think I remember people in the walnut thread trying to lower the ohm resistance of the walnut and it would mess with the overall sound. Higher ohm output ease the control of the audio quality.

 

[nesty]

I've stumbled upon the post here, where "Uncle Eric" says that

"When it comes to headphones, you generally want an output impedance lower than the headphone impedance. This is called the 'Damping Factor'."

and also

"an output impedance higher than the headphone impedance loses control of the bass".

Afaik the z1 has a 100 Ohms resistor in the signal path just before the output, so output impedance will be at least 100 Ohms. Since I use earbuds with an impedance of 32 Ohms that does'nt sound too good.

So would it/could it be beneficiary to change that tiny thing (100 Ohms SMD resistor) to maybe 10 or 20 Ohms? Or have I misunderstood everything?

There is a guy at a russian forum here who has changed it for 10 (bullit no. 4), but he's doing all kinds of crazy stuff so I don't know if the resistor alone is meaningful..

Try type hi z hp150 earbud

 

[knudsen]

Try type hi z hp150 earbud

Thanks, but it seems to me all hi-z have this bump at 2k, which I'm not happy about
https://www.head-fi.org/f/posts/13543350/

 

[nesty]

Thanks, but it seems to me all hi-z have this bump at 2k, which I'm not happy about
https://www.head-fi.org/f/posts/13543350/

The russian is referring to the maximum power transfer theorem. You can try other earbuds then that is close to 100ohm if that is the impedance of the source z1 as you mentioned. Let us know your impressions.

 

[macky112]

I've stumbled upon the post here, where "Uncle Eric" says that

"When it comes to headphones, you generally want an output impedance lower than the headphone impedance. This is called the 'Damping Factor'."

and also

"an output impedance higher than the headphone impedance loses control of the bass".

Afaik the z1 has a 100 Ohms resistor in the signal path just before the output, so output impedance will be at least 100 Ohms. Since I use earbuds with an impedance of 32 Ohms that does'nt sound too good.

So would it/could it be beneficiary to change that tiny thing (100 Ohms SMD resistor) to maybe 10 or 20 Ohms? Or have I misunderstood everything?

There is a guy at a russian forum here who has changed it for 10 (bullit no. 4), but he's doing all kinds of crazy stuff so I don't know if the resistor alone is meaningful..

For testing purpose and if you have a clean sounding amp is to use z1 headphone out, note not line out, into an amp because amps usually have very high input ohm and very low output ohm, so you are basically eliminating the damping factor at both the Dap out and earbud connections, this will give you an idea what is the theoretically "best case" sounding combo you can expect

As to if simply Replacing that 100 ohm resistor to 10 would cause any change, I don't know. Maybe you can try and let us know

 

[macky112]

The russian is referring to the maximum power transfer theorem. You can try other earbuds then that is close to 100ohm if that is the impedance of the source z1 as you mentioned. Let us know your impressions.

From what I've read, ideally you want from dap/amp headphone out, that connection to earphone to be no more than 1/8 of the earphones impedance. So for a 16ohm earphone, you want to have less than 2ohm at headphone out

I know some members measured original Walnut V2 to have 100ohm impedance at headphone out, so z1 is confirmed to be 100ohm too? That sucks

 

[macky112]

For those interested in the original Walnut V2 measurement

https://www.head-fi.org/f/threads/t...torial-in-post-2.800208/page-10#post-13107087