[leeperry]

way too many

so did I get it right in my previous post w/ the youtube/KS volume issue on W7?

yes, I think I'll put 2*LT1363 as final buffer...it's less versatile than 1028A, but it does magic to vocals! besides I just like to roll op-amps

 

[Calebcz]

Quote:

Originally Posted by leeperry /img/forum/go_quote.gif so did I get it right in my previous post w/ the youtube/KS volume issue on W7?

yes

Quote:

I just like to roll op-amps

Right now i prefer rolling omaps over tubes becouse of zero warm-up times. But there is so many combination .....

 

[leeperry]

I never got into the tube madness, I've got a dumb cat roaming the house...the first thing she'd do is stick her nose right on the money

besides the idea of my audio going through some old *ss technology kinda worries me...the THD figures don't look good(even though they're rather meaningless), and I don't think the SS would be as "sophisticated" as the top op-amps

 

[leeperry]

ok cool, I've just been told that the VIA drivers engineering team is looking into the KS volume issue

and I think I could get rid of the buffer op-amp if I set the jumper that increases the HP out amplification(200% instead of 70%).

I just want the AD797B...louder, basically

 

[leeperry]

so I've tried to set the HP out to 200% amp(instead of 70%), SQ was much worse...roll back!

and the problem w/ the HD2 is that as soon as you add a buffer opamp it will kill the SS of the opamps you set on the DAC output...and the AD797B is nice but rather bass shy on the DAC output, and it's not unity gain stable!

currently listening to 4*LT1363 on the DAC output and I left the buffer socket empty...good bass, amazing SS, and that magic color on vocals. I'll try to add 2*LT1128 as final buffer, they seem to be the "unity gain stable" version of the LT1028

or maybe 2*LT1360 or 6*LT1363, time will tell! but I won't mess around w/ opamps that are not +1 stable anymore...really don't wanna screw up the card, my ears or my beloved cd1k

 

[leeperry]

ok, awesomeness!!! after explaining the issue to VIA several times, they've given me 5.50 beta drivers that supposedly fix all the problems w/ KS! on both XP and W7

if anyone wanna try them, PM me...they're not WHQL yet of course.

if only Asus had been as reponsive when I annoyed the hell out of them w/ bit-perfection...but C-Media are just a bunch of amateurs, even Realtek does better drivers..

 

[kranius]

3 bursons w/ ±12V mod is ownage imo

can't wait for my regulators to be shipped

 

[MethodarN]

Many peoples says: 2x opa627 on adapter - best chip

someone listened this chip?

 

[Calebcz]

I was using 2x2604 + AD8022 about 2 weeks. 8022 isn't bad, but for my taste is too punchy and i'm missing deep bass. Also trebles is little bit "dirty".

LM4562 as final buffer has excelent bass, but overal sound is too harsh. I don't like this chip at all

AD275 is absolutely neutral and .... absolutely boring.

So what's next? AD823 .... hmmm, interesting

 

[leeperry]

2604 and 4562 are worthless...yes, try more AD parts IMO...4*AD797B on the DAC output worked great IME.

how's OP275 in your LDI+? my next soundcard has them...soldered...can't roll

 

[Calebcz]

OP275 (not AD - sorry) in LD+ is neutral, good sounding, only LT1364 from my opams collection is better

I tried 2604, 2134, AD8022, MC33078, LME49722, M4562, AD823 and OP275 was second best.

In Prodigy as final buffer OP275 isn't so good, dull sound and "music" si gone.

AD797B ? ~10 Eur per piece is quite expensive, maybe someday

What about AD797AN - there are many offers on ebay.

What is your next soundcard?

 

[leeperry]

well OP275 is made by AD...isn't it?

hah, yes...that's the problem w/ blind opamp rolling, what works here won't work there.
this said, AD797B on the DAC output is fantastic....add a burson v2 as final buffer, and you're good to go

I'm getting a Musiland Monitor 02US...I got bored of rolling, and I like the idea of getting my audio out of the PC case on its own external PSU....I should have it early next week

AD797A is a lower grade, supposedly not as good: http://www.head-fi.org/forums/f6/aud...-v-2-a-397691/

 

[Calebcz]

Thank you for your help so far, I will be looking for some AD797B.

 

[leeperry]

np! the best buffer I've heard was the LT1028ACN8...but it's not stable on the HD2, you'd need someone to look it up w/ an oscilloscope and possibly add a 510Ω resistor on pin 3 to make it behave....it might be very much worth it though, as it's simply astounding w/ the AD797B on the DAC output

I found LT1363/LT1364 too colored to my taste on the HD2....I hope OP275 will sound acceptable on the Musiland

 

[earfanatic]

As I read the LT1028 data sheet it does not seem to be enough just soldering one 510Ω resistor to it to stabilize. As it says to do so in a real different function.
It can be noticed easily you just desimmetrize it.

One said before the lt1028 is stable when it has at least 510Ω input impedance. When I read the HD2's DAC data sheet it already has a 610Ω resistor on it.

So altrough I already payed for a pair of lt1028 I wont try to stabilize it because it is not so easy to do so.
Do anyone tried lt1128?