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Review: ZERO 24 BIT/192KHz DAC/Headphone Amp/Pre-Amp - Page 196

post #2926 of 9228
5/13/08 at 7:50pm
Thread Starter 
Quote:
Originally Posted by scaz View Post
I bought some from them, but they are way to small for the brown bag adapter. Which one should we be looking for? Is there anything to help us?

Package Variations and Pricing
Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1469CN8 PDIP 8 C $5.85 $4.95 View
LT1469CN8 #PBF PDIP 8 C $5.85 $4.95 View
LT1469CS8 SO 8 C $5.85 $4.95 View
LT1469CS8 #PBF SO 8 C $5.85 $4.95 View
LT1469CS8 #TR SO 8 C $5.01 View
LT1469CS8 #TRPBF SO 8 C $5.01 View
LT1469IN8 #PBF PDIP 8 I $7.05 $5.95 View
LT1469IS8 #PBF SO 8 I $7.05 $5.95 View
LT1469IS8 #TRPBF SO 8 I $6.01 View
Either of these two will do fine:
LT1469CN8 PDIP 8 C $5.85 $4.95 View
LT1469CN8 #PBF PDIP 8 C $5.85 $4.95 View
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post #2927 of 9228
5/13/08 at 7:51pm
Thread Starter 
Quote:
Originally Posted by Pricklely Peete View Post
I'm the guinea pig for the HDAM unit. I ordered a Zero with the module last Friday. I don't have a clue when it will show up on this side ( Canaduh ) of the world. In the meantime it's thumb twiddlin' time on the MKIII's volume control. My HD650's are finally breaking in ( 350hrs so far ). They are getting better and better. I figure I'm 75-85% there.

Peete.
PP, will you be getting a set of the OPA627's so you can compare? That would be very cool!!
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post #2928 of 9228
5/13/08 at 8:21pm
Quote:
Originally Posted by Penchum View Post
PP, will you be getting a set of the OPA627's so you can compare? That would be very cool!!
I thought about this..... but I'm hesitant to spend the $$$ if I know I'll use the HDAM full time.



Peete.

PS I could always borrow a set from someone for the comparison and ship them back when done.
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post #2929 of 9228
5/13/08 at 8:28pm
i know this question was already asked, but i could not find a response. does anybody have anything to comment about the zero dac/amp driving a pair of akg k701? initially, i was just going to save up a lot of money and go all out, but this device has intrigued me, and may be right to start off with.
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post #2930 of 9228
5/13/08 at 8:53pm
Quote:
Originally Posted by mikaronni View Post
i know this question was already asked, but i could not find a response. does anybody have anything to comment about the zero dac/amp driving a pair of akg k701? initially, i was just going to save up a lot of money and go all out, but this device has intrigued me, and may be right to start off with.
Go back a few pages. I think FAQ mentioned the Zero would drive the K701's without issue.


Peete.
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post #2931 of 9228
5/13/08 at 9:30pm
"Earlier in testing, we found out that the mainboard Opamp has a sonic impact on the headboard output, but the headboard Opamps have no effect on the DAC output. Rather like a one way street. "

Just going through back issues of this thread and came across this. We know that not to be true now right?

p.s. does anyone know what the reset button does on the inside?
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post #2932 of 9228
5/13/08 at 10:15pm
Quote:
Originally Posted by tinseljim View Post
"Earlier in testing, we found out that the mainboard Opamp has a sonic impact on the headboard output, but the headboard Opamps have no effect on the DAC output. Rather like a one way street. "

Just going through back issues of this thread and came across this. We know that not to be true now right?

p.s. does anyone know what the reset button does on the inside?

Most likely a mains reset ? Just guessing since my Zero hasn't arrived yet.
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post #2933 of 9228
5/13/08 at 10:40pm
Anyone try an AD8620 in the DAC output yet ?
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post #2934 of 9228
5/13/08 at 10:49pm
What's with Auzentech's price for a pair of OPA627SM's with adapter ? They want 244.00 US !!! Are they HIGH on crack ? What's the diff between the DIP package and the metal can version ? Better EMI/RFI rejection ?

Seems like a giant gouge act. There 627AU price is nuts as well.
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post #2935 of 9228
5/14/08 at 12:02am
Cimarron has the 627au for $49 (2 on browndog adaptor). I got mine from them and it sounds great to me!

Link at Two Pre-Mounted OPA627AU Op-amps on 020302 Adapter (p/n OPA627AU-970601S) - OPA627-020302S
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post #2936 of 9228
5/14/08 at 12:24am
Here's a useful link of opamp comparisons ....

Notes on Audio Op-Amps
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post #2937 of 9228
5/14/08 at 1:25am
I've read that before. I though this was interesting.

Quote:
In all my testing, I've been unable to hear a difference between the OPA627AP and the OPA627BP. The datasheet says that the differences between the grades are in the DC specs, so this is not surprising.
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post #2938 of 9228
5/14/08 at 2:08am
quick question, where can this product be purchased? i tried searching for a while and with no results. is it only able to be purchased through other people like ebay?

edit: nevermind, i finally found the source
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post #2939 of 9228
5/14/08 at 9:41am
Thread Starter 
Quote:
Originally Posted by tinseljim View Post
"Earlier in testing, we found out that the mainboard Opamp has a sonic impact on the headboard output, but the headboard Opamps have no effect on the DAC output. Rather like a one way street. "

Just going through back issues of this thread and came across this. We know that not to be true now right?

p.s. does anyone know what the reset button does on the inside?
Um, No, it is still true if you are using the DAC output in fixed output mode (green light off, which most use). The headphone Opamp only comes into play if you are using the variable (volume knob, green light on) pre-amp mode. Sorry if this sounds confusing, but it's the only way I could think of saying it.

I believe the "reset" is a reset for the controller chip. Anyone know different? I've never had to use it yet.
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post #2940 of 9228
5/14/08 at 9:47am
Quote:
Originally Posted by Penchum View Post
Um, No, it is still true if you are using the DAC output in fixed output mode (green light off, which most use). The headphone Opamp only comes into play if you are using the variable (volume knob, green light on) pre-amp mode. Sorry if this sounds confusing, but it's the only way I could think of saying it.

I believe the "reset" is a reset for the controller chip. Anyone know different? I've never had to use it yet.
Yes that's what I mean, that it is possible to have both running at the same time, rather than it only being a one way street. But you're right about just the DAC definitely.

Does this mean that we can kill two birds with one stone. We can burn-in the dac and amp at the same time?
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