[hadron]

Anyone have an opinion if this is worth the trouble? I'm guessing that the op-amp upgrade will improve the line-out as well as the HP jack, otherwise it would be a waste.

Also, is Tangent the only distributor for this chip?

 

[mekanoplastik]

I upgraded my old d-12 with the ad8620 and it was a very noticeable upgrade..i recomend you trying it...

the chip can be ordered from AD as a sample, it will cost you 0$


my new d-25 should arrive next week, I will modify it as soon I get it

and post a review, I also want to make a pictorial with instructions.

if you go ahead and modify it please post your impressions since I have not yet moddify a d-25.

also,you can always put back the old opamp if you dont like the ad8620, so it is not a waste and the installation is pretty simple


(remember there are more opamps available from TI and AD as samples

)


good luck

m.

 

[Mystic]

The 8620 can also be PURCHASED directly from AD off their web site. AD provided free samples for for people/companies doing prototyping, hoping to later sell them large quantities. They don't provide samples to support the DIY community. OK, I've just climbed back off my moral high horse

 

[00940]

hum interesting thread. I've got a D25s and will receive soon a d12; will look the results with a great interest.

 

[hadron]

ah yes, free samples... used to do that all the time back in college being a poor EE student

Didn't know that AD was also a distributor, they actually sell in quantities less than 1000?

Now I curious about what other dual channel SOIC op-amps are out there that can run at +/-3 V. I just popped the hood and measured across the op-amp power pins, 6.04 V, with both AC and the Li-ion battery I'm playing with.

 

[mekanoplastik]

very interesting...!!!

I was reading tangent notes on opamps (http://tangentsoft.net/audio/opamps.html) and the ad823 seems to be a good candidate....hopefully someone knowledgeable in opamps can give us a hand

m.


edit:check this out.... http://www4.head-fi.org/forums/showt...=&threadid=703

 

[eric343]

Yes - the META42 is the improved version of the amp he mentioned in that thread...