[K3cT]

Quote:

Originally Posted by leeperry /img/forum/go_quote.gif A or B? any audible diff? tried LT1028AC?

I've never tried the A version but MadMax did. He can comment on that.

Hmm... I'm not sure about the AC grade but I did try the ACN8. The 4627-1 is way more neutral, extended and detailed in comparison.

 

[SpudHarris]

K3cT - I'm also back with the 4627-1, I never gave them a proper audition when they originally arrived because I was proper rollin' mad at the time. I have given them some time the last few days and am falling big style.......

 

[Mad Max]

Quote:

Originally Posted by K3cT /img/forum/go_quote.gif I've never tried the A version but MadMax did. He can comment on that. Hmm... I'm not sure about the AC grade but I did try the ACN8. The 4627-1 is way more neutral, extended and detailed in comparison.

 

[leeperry]

I don't speak chinese pork Madmax, care to elaborate?

ok, I'm really interested in AD845KN anyway, it seems to be the same family as AD797 and "K" is the highest grade: http://www.analog.com/static/importe...eets/AD768.pdf
Quote:

op amps such as the AD845 or AD797 may be more appropriate

Top opamps, did I miss any one? Yes AD797
Quote:

Never fond of AD797, but also try AD845, LT1028, and AD811/LM6181. The AD845 is almost class A

but majkel doesn't make it too appealing: AD797 now sounds like it should - Page 2 - Head-Fi

also curious about AD8597, still

 

[ROBSCIX]

Quote:

Originally Posted by joe_cool /img/forum/go_quote.gif I thought the OPA627 was clean but boring, OPA134 was honkey, and OPA604 was OK. AD8610 and AD825 I like better. LME49710 is best in most cases.

I agree, the LME49710HA is a great sounding units. I built units for quite a few associates and every time I received excellent feedback.
I tend to use the HA version of this opamp though.

 

[leeperry]

I've decided to give a second chance to LT1363CS8, yummy!

SS is very wide, vocals sound very true to life and bass is even more percussive than on 1028AC

no wonder there's a stock 1364 in this one: Super Pro DAC707

I'm also expecting some AD845KN and 4627-1A.

 

[buz]

Did you also try the LT1364? A dual would sure be easier to deal with but most people seem to think they sound worse...

 

[leeperry]

I already compared 1363/1364, 1363 was much clearer indeed.

so far I'm very impressed, it takes everything I liked from 1028A and adds even more percussive low end bass and a much wider SS, together w/ what it does best: true to life vocals. it's an all time fav from LT to many ppl for a reason

and it can output 50mA so it drives my 32Ω phone dead easy...DC offset is around 5mV.

it's also Unity Gain Stable, Firestone recommended me to use that if any possible.

 

[Mad Max]

I enjoyed 1363 most with DT880 when I had it.
I haven't really used at all in a long time.

 

[leeperry]

it's almost as you can hear its very high speed, it can snatch tiny minute details...I feel that 1028A used to be a bottleneck to my phone, now they're the bottleneck...not the opamps anymore

 

[Spacehead]

damn! I got Koss KSC75 today. And only single op amps in the chain now!
LT1028ACN on X-FI and ADA4627-1ARZ x 2 + ADA4627-1BRZ x 1 on PPAv2

So lovely sound coming from my system. I don't know if this is hifi but it is very rocking fluent. KSC75 seem to benefit from the massive power reserve of PPAv2 much better than Sennheiser HD 438. And there is no hiss.

These op amps of course are absolutely most best op amps I know. And I know you think the same. Perfect!

 

[leeperry]

what kind of diff to your ears between ADA4627-1ARZ/BRZ?

 

[Spacehead]

Quote:

Originally Posted by leeperry /img/forum/go_quote.gif what kind of diff to your ears between ADA4627-1ARZ/BRZ?

I have not tried yet. How could I recognize the sound, It should be extremely subtle difference? The source mixes things up. I could try to establish some kind of base sound from LT1028 on the X-FI and
then
ADA4627-1BRZ on left and right , ADA4627-1ARZ on ground
and other way around.

Need to solder one BRZ...

Which headphones should I use, KSC75 or HD 438 ?

 

[Mad Max]

Hmm, I've spent the last few days giving 4857-1 a more thorough listen, and now I swap out to 8091, and dang, I really didn't give this one a good chance. It's less forgiving, smoother, and more extended with better bass presence.

I'm realizing how much micro-detail I've been missing from 4857-1.

Not entirely sure how 4627-1B sounds in your equipment, but the AR should at least be warmer.

They sound almost the same in my gear, just the A is lukewarm with slightly less treble extension than B. B is neither warm nor cold.

 

[buz]

What is the best place to get single to dual opamp adapters? Any other place than cimarron with potentially lower prices?