Advice on op-amp needed
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bubbaj

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I'm considering a meta42 and I have a choice of op-amps.
AD843JN, AD8610, or AD8620. I know little about these amps and would appreciate the opnions of others.

I have ETY 4p but I will be replacing the cable to get rid of the microphonics. I may stay with the 4p cable or go to the 4s. My audio source is a SlimX. I enjoy Jazz, female vocal, classical, music.

With all that in mind, which op-amp would you choose and why.
Also, would you go with the class A option? The amp will most likely be powered with a wall wart most of the time.

Thanks
bj
 
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post-170946
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andrzejpw

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The 8610 and 8620 are the same. The difference is, the 8620 is basically 2 8610s. So you need one 8620(for left and right), or 2 8610s(one for left, one for right).

I'd go for the 8610. Just because I say an opamp a channel is better in theory. That's what I'm using in my meta.


The 843, otoh, I haven't listened to. There are supporters of both. Tangent really seems to be holding out with it.
It's really up to you. Hopefully, more knowledgable people will chime in here.
 
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JMT

JMT Audio:PPA/META42 Amp Factory
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ppl

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IMHO the AD843 is better sounding overall than the AD-8610/20 But the 843 draws 13 Ma and the 8610 3.5 at the most and typicaly 2.7Ma. in addition the 8610 has some sonic advantages over the 843. The AD-843 has been my fav opamp for over a decade but it is getting old and is built upon the Analog devices CB process like the Dual AD-823. the CB process is a juntion isolated process and is not as good as the Dielectric isolation process the 8610/20 are built upon. Also the 843 will only swing to within about 4 volts of the Rails while the AD-8610/20 to with in 1.2 Volts Hope this helps.
 
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