[haloxt]

On page twelve I linked a way to test for fake opa627/637's. And yes the majority of them from unauthorized dealers are fakes, there is no reason to buy opa627/637 from them. Because if they cost 80% off retail they obviously did not come from the manufacturer, and if they cost close to retail price it could easily be a scam to make you think it is legitimate (very likely on ebay). Don't take the chance and just buy it from digikey or newark or another authorized dealer.

 

[damsonlee]

I have received the replacement OPA627 from the seller. My ZERO now sounds really good to my untrained ears. The cracking noise disappeared. I don't know whether or not the new one is fake. But I don't bother as long as it sounds good.

 

[mplee79]

Hey Damson. What kind of music do you typically listen to? Do you have the Zero hooked up to another amp or just straight from the headphone out?

Who did you buy the unit from?

 

[Currawong]

If it sounds good, they probably aren't fake. The 627's are rather warm-sounding.

If they work in the Zero and sound good, the best bang-for-the-buck is the LME49720 dual OPA. You can get 3 as samples from Linear Tech. The old favourites, the LM4562 are very good too.

 

[mplee79]

can you put the same opamp in both the dac and headphone sections?

 

[damsonlee]

Quote:

Originally Posted by mplee79 /img/forum/go_quote.gif Hey Damson. What kind of music do you typically listen to? Do you have the Zero hooked up to another amp or just straight from the headphone out? Who did you buy the unit from?

Most of the time I listen to relaxing music (New Age) and some Hi-Fi reference dics including all kinds of music. I have the Zero hooked to a receiver via optical toslink. Also listened straight through the headphone out. Both are good enough for me. The sound is very warm and I like it.

I bought it from wsz0304 on ebay.

 

[coolfungadget]

I measured 4 OPA627s from my '09 ZERO DACs. Results are attached...

 

[garson]

Quote:

Originally Posted by coolfungadget /img/forum/go_quote.gif I measured 4 OPA627s from my '09 ZERO DACs. Results are attached...

Can anyone comment these results?

 

[bbbretzel]

Quote:

Originally Posted by garson /img/forum/go_quote.gif Can anyone comment these results?

see there : http://www.head-fi.org/forums/f6/fak...37/index7.html

 

[crapback]

I just picked up an '09 and I'm pretty impressed for a $160 purchase. It comes with 627's in the dac and I rolled the headamp opamps with some 4562's for the moment. It's funny, the booklet in the box says that it comes with either the 2604's or the 627's but the ebay listing says 627's. Glad I didn't get the 2604's. TI isn't giving out free samples of the 627's.

I hope this thing doesn't go poof on me. If it lasts I'd definitely say it was worth the money. I just wish my first few hours with it weren't in the back of an idling bigrig. It's really hard to make out the bass detail on my 650's with the low rumble of a big diesel.

 

[garson]

Quote:

Originally Posted by crapback /img/forum/go_quote.gif I just picked up an '09 and I'm pretty impressed for a $160 purchase. It comes with 627's in the dac and I rolled the headamp opamps with some 4562's for the moment. It's funny, the booklet in the box says that it comes with either the 2604's or the 627's but the ebay listing says 627's. Glad I didn't get the 2604's. TI isn't giving out free samples of the 627's.

There is also 09 Edition with OPA2604, it's 7$ cheaper.

09 NEW VERSION ZERO 24/192KHZ DAC HEAD AMP @USB OPA2604 - eBay (item 120433096321 end time Sep-08-09 15:27:52 PDT)

 

[crapback]

Another question for fellow zero owners. Did your 09 come with a bunch of elna and rubycon caps in it? I'm going to do the frankenzero mod and i bought nichicon muse caps for the whole thing. Plus a bunch of different box caps to experiment with.

I didn't look to see what kind of caps were in mine before I bought the muses. I was going by the pics in the frankenzero thread. Well, it'll be fun to fiddle with it even if the caps aren't really much of an upgrade if at all. There are still a few cheapos on there to swap out.

 

[jzono1]

How does the zero work for switching between builtin headphone amp & line output? Is there a switch, or are both active at the same time? I'm looking at the zero for using it with both headphones and a speaker setup attached at the same time, would that work well?

 

[higo]

Hi!!! Greetings from Argentina!!! This is my first post.
A couple of days ago I recieved the 09 version. The first thing that I have to do is changing the volume pot, ´cause is unbalanced at low levels...very noticeable indeed...what do You think of this item??? Will it fit??

DACT Type 21 Stepped Attenuator Potentiometer 100K 2A3 - eBay (item 120471954152 end time Sep-27-09 14:56:18 PDT)

Other point is to change the OP, ´cause in the Amp section I have JRC082D. I already order samples of LME49860MA from National.
Any advice will be appreciated.
Thanks a lot!!!
Marcelo

 

[crapback]

Welcome to head-fi Marcelo.

Congratulations. You just cost me another $27.

I purchased a dac from gigawork on ebay before and he seems to be a reputable seller. A $10 stepped attenuator seems way too good to be true but it has to be better than the cheap crap volume pot that comes stock in the zero. I guess I'll found out in a week or two.