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Flavors of Audio Op-Amps


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#31 bpribadi

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Posted 19 October 2004 - 01:28 AM

Yes, I think it will be usefull for others. I will make another thread, but at the moment I'm very busy no.gif , probably later at the end of the month happy.gif

#32 heady

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Posted 22 October 2004 - 05:38 PM

bpribadi, the OPA 2107 you put into my pimeta is very good. Been listening to it last night and today. Very detailed and yet not fatiguing to listen to. Definitely an improvement over the OPA2228. Yes, it's good. Thanks.
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#33 tropicalrips

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Posted 25 October 2004 - 07:32 PM

got my AD8066AR samples today smile.gif
i havn't figure out how u made the adpators yet bram, but i "borrowed" some ideas from your pic tongue.gif
still using the DIP8 adaptors, but this time i bend the legs of the opamp, this made it a little easier to solder onto the DIP8

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now testing the chip with the jason amp, it does not sound as "far" as u mentioned the other day, will post more later smile.gif
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#34 bpribadi

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Posted 26 October 2004 - 11:21 AM

Your soldering work is amazing Tropical !!! thumbup1.gif

I see very little melted part of the DIP 8 socket which amazing !!!

You can also try the AD8066 in one of your CMoy... happy.gif (I saw you have made a lot of CMoy in the pass thread)

#35 tropicalrips

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Posted 26 October 2004 - 11:18 PM

thanks bram smile.gif
i also got samples of the AD8616AR chips but ran out dip8 holders tongue.gif
hav u tried the 8616 before? i'm begining to like the 8066 chips, sounds very fast, very good details on bass parts.
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#36 Guest_Ruach_*

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Posted 26 October 2004 - 11:48 PM

Nice soldering biggrin.gif

#37 bpribadi

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Posted 27 October 2004 - 10:18 AM

QUOTE
hav u tried the 8616 before?


Not yet. the slew rate looks on the normal speed, around 12V/us. Comparable with OPA2228.

#38 tropicalrips

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Posted 28 October 2004 - 11:19 PM

just finished soldering the 8616 on dip8 holders smile.gif
now testing it with a basic A47 configured as Cmoy, i hav to say it sounds very similar to the 8066 & 2228 closer maybe to the 8066.
i think the 2228 is a "picky" op-amp, sounds good only in some amps, when i first tried it with a cmoy it sounded thumbdown.gif but in the jason amp it sounds thumbup1.gif

AD8616
has good speed, very similar to 8066, works well in a Cmoy, maybe not as detailed as 8066.

one interesting finding to share smile.gif with the 8616 op-amp in my A47, when i fitted the second op-amp with a JRC4556, the amp has no sound, i think the 4556 somehow made the 8616 unstable, when i switch off the amp i can hear the music "fizzle" for 1/2 sec before it cuts off.

A47 with 8616 + 8616 works fine
A47 with 8616 + 2134 works fine
A47 with 8616 + JRC4556 no sound

strange...anyone has any idea why the A47 doesn't work with the 8616 + 4556 combo? the gain on my A47 is 6 unsure.gif

Edited by tropicalrips, 28 October 2004 - 11:22 PM.

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#39 heady

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Posted 30 October 2004 - 08:38 PM

I have just switched out an OPA 2107 for the AD8620 in my Pimeta and through my DT880, it sounds very very good. I think the AD8620 is a good match for my headphones and it sounded too bright earlier probably because my pimeta has not run in sufficient yet.

If you are planning pimeta/PPA and using DT880, you may want to consider the AD8620 but only after running in your amp for a long time.


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as he sigh for the love of a lady"

Yeoman of the Guard - Gilbert and Sullivan

#40 bpribadi

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Posted 30 October 2004 - 10:47 PM

QUOTE
strange...anyone has any idea why the A47 doesn't work with the 8616 + 4556 combo? the gain on my A47 is 6


No idea unsure.gif Did you put the JRC4556 for the ground channel?

#41 tropicalrips

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Posted 30 October 2004 - 11:19 PM

QUOTE (bpribadi @ Oct 30 2004, 10:47 PM)
QUOTE
strange...anyone has any idea why the A47 doesn't work with the 8616 + 4556 combo? the gain on my A47 is 6


No idea unsure.gif Did you put the JRC4556 for the ground channel?

yep, use the JRC4556 as ground.
i finally recieve the AD8620 today smile.gif mounted them on dip8
now the my Jason amp has a new configuration rolleyes.gif
2 * AD8620 for left/right channels
1 * AD8066 for ground * rail spliter
i think i like this combo best laugh.gif the amp is fast, detailed, and lots of kick on SR80
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#42 heady

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Posted 01 January 2005 - 10:44 AM

bump...
"He sip no sup and he crave no crumb,
as he sigh for the love of a lady"

Yeoman of the Guard - Gilbert and Sullivan

#43 tropicalrips

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Posted 24 January 2005 - 08:36 PM

these arrived today on my bd smile.gif "gifts" from AD tongue.gif
AD797 single channel op-amps
not sure if anyone else tried them before, AD says these are good for pre-amps, with very low noise
i hav them mount on DIY adpators and driving in my desktop amp.
the 797 sounds good, very warm like opa2132 but more detailed, i find it to be a good match for my HD595 better midrange then 2132 and not as analytical as the 8610, adds very nice body to the music

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Edited by tropicalrips, 24 January 2005 - 08:37 PM.

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#44 hi5

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Posted 25 January 2005 - 05:12 PM


Hi bpribadi,

I'd like to know if AD8066, OPA627 or any other that suit MY McCormack DNA 0.5 Power AMP. Currently its using AD71??.

TQ rolleyes.gif


#45 bpribadi

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Posted 26 January 2005 - 02:07 PM

Aahhh.... it's been quite sometime since the last time I loged in tongue.gif

Been busy with other things, and my office notebook spoiled... but it is a good news, because it means I'm getting a new one biggrin.gif

hi5, I have no experience with McCormack amp, so I cannot tell which op-amp suitable for it. And it is also depend on you music taste. What is lacking for you with the current AD71?

Nice work tropicalrips thumbup1.gif And,... Happy "belated" B'day !!!