[ROBSCIX]

Quote:

Originally Posted by 12Bass /img/forum/go_quote.gif All your base are belong to OPA1641.

LOL, found those did you?

 

[leeperry]

hehe, sometimes I miss the AD797B Z soundstage and the 1028A crazy low end bass..but they clearly couldn't compete on vocals and general transparency IMHO, apparently a very high slew rate is where the money is.

You could almost ID microphones and the kind of dampening material they put on the studio cabin walls w/ the 1363 hahaha..I'll try to add two 1360/1128 as final buffer for the hell of it.

 

[dasmb]

Hey ya'll chip-heads got any advice on drop-in 8-DIP upgrades?

I'm running a CMOY -- actually, two of them, one with an OPA 134 and the other with a OPA 227, which I slightly prefer. I'm interested in experimenting with the sound of different chips prior to building my next amp (which will likely be buffered, 3 channel, the whole 9). I could be convinced to try an SOIC on an adapter, but the concept sounds less durable to me.

Supply voltage can be either 9V or 18V. Gain is 2.

I'm looking to order at a bare minimum a Linear Technologies LT1364CN8, but $6 shipping on a $7 order seems silly. If I could get between 3 and 5 interesting variants from Digikey all at once that would be the cat's PJs, man.

 

[leeperry]

If I were you I'd go 2*1363 on an adapter(wider center channel)..dual opamps always shrink the stereo image IME, but well YMMV

only on the OPA1612, they say that they finally used two different pieces of waffer to avoid killing the xtalk altogether....but most dual opamps just got way too much in common on the two channels to my taste, even Browdog says it...and majkel agrees on that too I think.

comparing 1364 <> 2*1363, it's dead obvious....I see it as unbalanced/balanced.

 

[Pluto2]

Quote:

Originally Posted by 12Bass /img/forum/go_quote.gif All your base are belong to OPA1641.

Is it that good!?

How does it compare to opa221/827 from your impression?

Oh, I got mine too, need to get more header pins to solder them up for testing....

 

[12Bass]

Sorry... haven't received any yet.... just having a bit of fun. Forgot the mention that the OPA1612, in certain applications, can cause the sweet, resonant, oscillation of cosmic strings....

 

[ROBSCIX]

Quote:

Originally Posted by 12Bass /img/forum/go_quote.gif Sorry... haven't received any yet.... just having a bit of fun. Forgot the mention that the OPA1612, in certain applications, can cause the sweet, resonant, oscillation of cosmic strings....

I figured you tried them out based on what you said. They are new addition to the sound plus line up from TI. The 1642 which is dual and the 1641 which is single. I mentioned the release to a few guys through PM.
They sound good to me and spud also said they sound good based on testing. I would be interested in hearing your opinion when they come in.

 

[ROBSCIX]

Quote:

Originally Posted by Pluto2 /img/forum/go_quote.gif Is it that good!? How does it compare to opa221/827 from your impression? Oh, I got mine too, need to get more header pins to solder them up for testing....

They are quite good based on the limited testing I have had a chance to perform. They are a very new opamps from TI but reports from other members here also say they are very good.
You will only know if you test them yourself as everybody is using different circuits.

 

[K3cT]

Speaking of audio-specific op-amps, Linear also has their own LT1115. Anyone tried that before?

 

[leeperry]

I did try LT1115CN8, it was nothing to write home about...Andrea said it'd sound "sweeter" thank 1028A, I'd say "duller".

BTW, I read several times that chinese music was the worst benchmark for audio gear...and I have to admit that the remastered edition of the "Enter The Dragon" OST sounds miles better on the 1363 that it ever did on the 797B.

they use far more complicated harmonies that western music I think...now I need to find a matching final buffer, maybe 1128A

 

[ROBSCIX]

Quote:

Originally Posted by K3cT /img/forum/go_quote.gif Speaking of audio-specific op-amps, Linear also has their own LT1115. Anyone tried that before?

Order one up and try it out. Applicaiton and circuit plays a very large role in overall sound quality.

 

[leeperry]

ah well, I'm back on the 797B...it's hard to pass on an opamp that throws audio at you on the X and Y axis simultaneously!

apparently I managed to kill 2x797B and 2x1028A, not sure how?! static electricity maybe? they just give a loud whine, it sounds like what you get on a FM radio between 2 stations

anyway, 797B on a DAC output has always left me out of speech....w/ its amazing SS! sure, you can't hear the studio cabin walls reverb, but who cares about that anyway?

I'll add some brand new 1028A as final buffer later today, for the "coup de grace"

 

[K3cT]

Told you the 797B is where the gold is at, leeperry.

OK, now it's time to put these 4627-1s on a serious audition.

 

[leeperry]

well 4*797B+2*1028A has always been my fav combo by far...but some of those chips were giving a loud shredding whine?! I thought they were oscillating to death...but these were just KIA, some other chips from the same batch work just fine

so far 797B just works on the DAC output, no crackles, no whine...just an outstanding SQ.

I hope 1028A will play nice as final buffer, it gives such an amazing low end bass slam...I can't find a word to describe how awesome it sounds.

 

[ROBSCIX]

Quote:

Originally Posted by K3cT /img/forum/go_quote.gif Told you the 797B is where the gold is at, leeperry. OK, now it's time to put these 4627-1s on a serious audition.

There are quite a few around that have been advocating the AD797 and the 4627-1's they seem to be very popular among the opamps swappers.