[Nedman]

Quote:

Originally Posted by ccschua /img/forum/go_quote.gif If u look at the oscilloscope, it is amazing results.

What's good about the results on the oscilloscope?

I had no idea what it all meant

 

[ScottieB]

^ what he said.

 

[richierich]

Currently burning in my LM4562s. Should I put one in the DAC section and put the LT1364s back in the amp section?

 

[Carter54]

My Zero is on its way cant wait to play

 

[ccschua]

Quote:

Originally Posted by Nedman /img/forum/go_quote.gif What's good about the results on the oscilloscope? I had no idea what it all meant

To a designer, Oscilloscope is like fishing rope.

The OPA 2604 just give a lot of overshoot at the frequency response, even can be noticed at 10kHZ response.(check carefully, u can see the response go above the flat line)

Now this overshoot results in treble sounds rough and bright, fatigue if listen long time.

Whereas OPA Sun is more energetic if you see its short term response. The treble is full of detail and smooth as if driving on 7 lane highway instead 4. (and u get into traffic jam less likely than 7)

 

[glitch39]

are the HDAM's compatible for use on the zero's amp section? I have one on the DAC section, but they would be just a great on the amp section, then I can save one one additional component

 

[Nedman]

Quote:

Originally Posted by ccschua /img/forum/go_quote.gif To a designer, Oscilloscope is like fishing rope. The OPA 2604 just give a lot of overshoot at the frequency response, even can be noticed at 10kHZ response.(check carefully, u can see the response go above the flat line) Now this overshoot results in treble sounds rough and bright, fatigue if listen long time. Whereas OPA Sun is more energetic if you see its short term response. The treble is full of detail and smooth as if driving on 7 lane highway instead 4. (and u get into traffic jam less likely than 7)

Thanks

I think I see it, it's more pronounced on the 100Hz photo than the 10Hz photo. But its still there in the 10Hz photo.

One thing tho, that second set of photos are for the earth unit. So the sun unit must be more energetic again.

 

[alxwang]

Really newbie question but hope can get answer:

If I just get two earth from н¨ÍøÒ³ 1 can I just use one replace opamp(dual op627) and the other one be use in headphone amp?

Also where I can find the information about upgrade the headphone amp?

Thanks.

 

[ccschua]

Quote:

Originally Posted by alxwang /img/forum/go_quote.gif Really newbie question but hope can get answer: If I just get two earth from н¨ÍøÒ³ 1 can I just use one replace opamp(dual op627) and the other one be use in headphone amp? Also where I can find the information about upgrade the headphone amp? Thanks.

pls make sure ur purchase is dual output type.

Alltogether 3 opamp is required. 1 for the DAC section (replace opa 627) and 2 for the headphone amp section.

 

[alxwang]

Quote:

Originally Posted by ccschua /img/forum/go_quote.gif pls make sure ur purchase is dual output type. Alltogether 3 opamp is required. 1 for the DAC section (replace opa 627) and 2 for the headphone amp section.

Thanks a lot!
Another q: Is that headphone amp section replace job still a pull out and put new one in process or need solder?

What the difference of sun and earth? Which one is better?

 

[azncookiecutter]

Quote:

Originally Posted by ccschua /img/forum/go_quote.gif pls make sure ur purchase is dual output type. Alltogether 3 opamp is required. 1 for the DAC section (replace opa 627) and 2 for the headphone amp section.

I thought the opamp in the headphone section was a dual channel one? Then it'll just need 2 opamps in total, provided that they're both dual channel opamps?

 

[ccschua]

Quote:

Originally Posted by alxwang /img/forum/go_quote.gif Thanks a lot! Another q: Is that headphone amp section replace job still a pull out and put new one in process or need solder? What the difference of sun and earth? Which one is better?

Just pull out and put in. it is a socket type. fren, imazine zero is like yr, pls undress her and see what is inside.

 

[ccschua]

Quote:

Originally Posted by azncookiecutter /img/forum/go_quote.gif I thought the opamp in the headphone section was a dual channel one? Then it'll just need 2 opamps in total, provided that they're both dual channel opamps?

again for someone who dun want to open zero and see inside, there altogether 3 opamp being used. 1 for DAC section and 2 for the headphone amp section. all are dual output.

 

[BigTony]

I've seen on Ebay this Zero DAC and HeadAmp with USB, but nothing in the pictures indicates a USB socket?
Am I to assume they mean to use a USB-Optical adapter? Has anyone got any experience on the USB-optical? I would like to grab one of these from my office at work, to tempt me to go in more often!

Cheers

BT

 

[richierich]

Yes the upgraded Zeros come with a USB/SPDIF adapter.