[Spacehead]

I am listening now to AD8397+AD8599 combo. Got it properly working on my BD139x3 Class A amplifier which has tuned cmoy core. Soundstage is a little confined but detailed enough. A little fatiguing highs. Instruments feel far away. Very realistic anyway. Very fast of course. I think AD8397 is a bit muddy, but interesting and fun sounding op amp. AD8599 compliments it well in ground channel.

Overall I think my amplifier needs tuning still. Vocals seem too distant for my liking. Or then it is my headphones, Sennheiser HD 201 that lack mids too badly. Can't do a proper review with these phones! Soon I get Sennheiser HD 438, I hope they are better.

 

[CodeToad]

Currently running 3 x OPA1641's in an M3. Very nice. I think I like them better than OPA627's.

 

[SpudHarris]

x2 - Love OPA1641's! In my top 3 for sure........

 

[ROBSCIX]

I can agree on that one. I like the 1641's also....

 

[12Bass]

Damn.... OPA1641s should be here tomorrow.

 

[ecclesand]

Where are you guys getting the OPA1641. Every place I have looked to buy them shows a lead time of a few months!

EDIT: NM....found them in stock at Mouser.

 

[fzman]

Quote:

Originally Posted by ROBSCIX /img/forum/go_quote.gif Sounds like a quad opamp. They are just using the amps they want and leaving the others unused. If I am understanding you right. Provided the pin outs are the same, you can swap them out with dual channel version if you want.

no, there are some weird opamps with are dip14, which only use 8 pins, and the rest are nc -- not sure why, but i have seen them

 

[tdn135]

Which opamp will be beter for rock/heavy metal on Auzentech X-Plosion with Alessandro (Grado) MS1i headset. AD797BR or OPA627AU? I can get them for the same price.

These are the links to seller:
Dual to Mono Op amp module 4558 NE5532 TL072 to AD797BR - eBay (item 350317485329 end time Mar-17-10 09:19:56 PDT)
Dual to Mono Op amp module 4558 NE5532 TL072 to OPA627 - eBay (item 360213670439 end time Mar-01-10 18:38:37 PST)

 

[SpudHarris]

I just ordered the 797BR's from there. Personally I prefer the 797's to the OPA627's but it's a personal preference.

 

[crapback]

I've never seen a custom painted 797 like that before. The ones I ordered from digi-key definitely don't look like that. I wouldn't be surprised if the only upgrade you'd be getting from that seller is the new paint. I'm calling shenanigans.

Here is a link to genuine AD797BRZ's. Digi-Key - AD797BRZ-ND (Manufacturer - AD797BRZ)

 

[SpudHarris]

I thought that also but the ARZ's that come with the ibasso stuff are the same. NOS apparently and Audio jade have sold quite a few in the history section. I agree that e-bay isn't the ideal place for getting the genuine article but there are a few reputable sellers and Audio Jade does have good feedback. I got my last lot of BRZ's from Farnell but I've ordered one of those modules off the e-bay site and I'll report back if it is hookie!

 

[crapback]

I would love to be proved wrong.

The only other opamps I've seen painted like that were some DIP8 NE5532's I got with a gigawork DAC.

 

[ROBSCIX]

@Crap, are you talking about the units in the links in post #2228?

These units are painted in the same way: 8620BR
If you scroll down there is apicture that you can see they have similar paint.
Same as this unit also:AD797

They look similar to the units in the linked pic. Unless I am misunderstanding what paint your refering to.

 

[crapback]

Yup. I guess to me the paint looks like a cheap silkscreen afterthought. The paint just looks too cheap for me to think it's a factory job.

 

[ROBSCIX]

I have units from different sources and I have seen the AD units marked differently. Some have the full white with the black lettering and I have seem them just all black with white lettering like most other opamps. Both units were received from reptuable sources.

It is great to point out if any of us think their are some fakes floating around because some times people new to the opamps don't realize these items can be counterfieted.