[Dark Helmet]

I believe it was over in the Walnut thread, that I posted this list of opamps I recently ordered -

1x - DIP-8 dual opamp, made from 2x ADA4627-1BRZ mono opamps
2x - DIP-8 dual opamp, made from 2x AD825AR V3 mono opamps
2x - DIP-8 OPA2134 2134PA dual opamp
2x - DIP-8 LME49720NA dual opamp
3x - DIP-8 PHILIPS NE5532N (Vintage - mid-90s) dual opamp

The ones that I've received so far, are the ADA4627-1BRZ and LME49720NA.

The AD825 is a cool opamp too but it's just more of the same of what the Z1 already is warm and fat. Out of all of the opamps you listed there I think the 2134 is the best with exception to the 4627 which I have not tried.

 

[nesty]

Yes.

Thanks, I got my z1 and compared it side by side with walnut v2s and my ears tells me z1 is a notch higher even with default op amp. Hard to find opa2604 and the only available part is opa2134 from my place.

 

[DBaldock9]

@DarkHelmet, is the OPA2134 pin to pin compatible with OPA2604? I mean just plug directly into the socket? Thanks

Google can be your friend.

Just did Google Searches for "NE5532 pinout", "OPA2134 pinout", and "OPA2604 pinout" - and they're all the same.

 

[dkfuel]

The only thing I can't stand is the tramp stamp and the font

Tramp stamp! That had me howling!!

 

[DBaldock9]

The 2134 is an excellent opamp try it. As far as there being a chart, not that I'm aware of. Ti's all trial and error. I decided on the 2604 because it is very balanced and has great detail and speed. The Z1 is warmer than the Walnut, but considerably more musical, and the 2604 gives the Z1 better resolution and detail, which help to make the Z1 a more complete player. There are probably other opamps out there that may be better. You may like the 2134 better for your tastes, that's why i would recommend you try it.

Went ahead and ordered that 2-pack of OPA2604AP opamps to try.

 

[JesvsR]

Just ordered mine right now¡ I've looking for a budget DAP+USB DAC and I think I've found it. Just 26€ on CKLewis. My VE Monk+ and my Takstar HI2050 are waiting hehehe

 

[DBaldock9]

Just ordered mine right now¡ I've looking for a budget DAP+USB DAC and I think I've found it. Just 26€ on CKLewis. My VE Monk+ and my Takstar HI2050 are waiting hehehe

When I first received my Z1, I connected my VE Asura 2.0 (2.5TRRS - with a 3.5mm TRS Plug -to- 2.5mm TRRS Jack Adapter), and started playing my "Iona" (UK Celtic Progressive Rock band) CDs (whole albums converted to single 320KB MP3 files, originally for my Walnut v2) - the presentation of a wide & open sound stage, and the clarity of vocals, was amazing (especially considering the price of the Z1).

The Monk+ also sounds great with the Z1.

 

[james-O-hifi]

Put an OPA2604 Opamp and I think your results might change.

Yeah, I gotta dive into that OPAMP game. On my shopping list:

OPA 627 AP
OPA 2604 AP
OPA 2134 PA
LME49720NA
ADA4627-1BRZ (which is the only one that seems to have surface mount pins, can you confirm that?)

Anything else I should get?

 

[knudsen]

The Walnut v2s appears to be using OPA2604 - would it be certain that this is the OPA2604AP mentioned, or are there several variants?

 

[makima]

is someone using their Zishan as USB DAC?
please share your findings, thanks!

 

[james-O-hifi]

Oh and btw, do I need one of these Opamps or always two?

 

[Dark Helmet]

The Walnut v2s appears to be using OPA2604 - would it be certain that this is the OPA2604AP mentioned, or are there several variants?

As far as I know it should be the same.

 

[Holypal]

is someone using their Zishan as USB DAC?
please share your findings, thanks!

I tried. Turn the DAP off, hook it to the USB port, and turn it on. It doesn't need extra driver installation.

In foobar2000, it shows as 'ZiShan Z1 HIFI Player'. It supports up to 24bit/352.8KHz PCM, but not capable of handling DSD64.

In my case, it doesn't support WASAPI. I have to use the normal data stream.

It plays while charging.

 

[Dark Helmet]

Oh and btw, do I need one of these Opamps or always two?

2604 and 5532 are basically a dual/stereo opamp th AD825 is a single/Mono opamp for instance and needs two of them mounted to a board for it to work. Here is an example.

http://www.ebay.com/itm/1x-Dual-to-...lace-NE5532-/120771740600?hash=item1c1e8e83b8

 

[Dark Helmet]

I tried. Turn the DAP off, hook it to the USB port, and turn it on. It doesn't need extra driver installation.

In foobar2000, it shows as 'ZiShan Z1 HIFI Player'. It supports up to 24bit/352.8KHz PCM, but not capable of handling DSD64.

In my case, it doesn't support WASAPI. I have to use the normal data stream.

It plays while charging.

Have you done the firmware update?