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How to know if GAN-fet amp and Lyngdorf 2170 (as a Pre and Dac) are compatible

I have no experience matching separates but have been advised to confirm compatibility between amp and pre to avoid performance issues.  The person warning me did not elaborate on what problems there could be, but suggested I will be good if the pre-out voltage is 2 or higher.  He mentioned 2.8 as an example.  Some pre-outs are as low as 1v, he said, which is not good.  I have a text into the US rep for Lyngdorf about the pre-out voltage, but suspect there could be more to ensuring good compatibility.

What if the voltage is 2?  Would it be good but not as great as if it were 2.8?   Or is it fine as long as it’s over a certain minimum value?

Another person suggested I “make sure the gain on the amp and the pre-out match”.  It seems a poor match can lead to the inability to adjust volume in adequately small increments.

I am accustomed to very precise volume control as the Lyngforf adjusts in 1/10th db increments.  I don’t necessarily have to have it that fine, but wouldn’t want to lose the ability to set volume where I choose.

If those in the know would be willing to bring me up to speed, I sure would be grateful,

Thank you,

rc22
rc22 OP
121 posts
 
It was never about the topology, if that is what you mean by “how the amp is built”.   Including the descriptive “GAN-fet”, which is Class D, in my OP was extraneous, for sure, so I can see why anyone might construe it as you did.

Everything worked out.  I ordered the amp.
mapman's avatar
mapman
21,830 posts
 
It should be fine on paper. How the two actually sound together though can’t be known until they are setup and running in your room with your speakers.
My prediction is you should get very good results.

whwre you can run into preventable technical issues that can result in higher distortion and compromised performance is with a high output impedance tube preamp. Input impedance of Class D amps can be as low as 10k ohm. You want that higher.
rc22 OP
121 posts
 
Thanks for posting, mapman.  I’ve never seen a member with more posts.  Let’s coordinate so I can do an OP that flips your postometer to 20k.
mapman's avatar
mapman
21,830 posts
 
No rush. I’ve been at it for awhile, have lived and breathed this stuff since a kid, like to help people and learn myself, and always find topics of interest. If I win a $20000 Audiogon gift card for hitting 20000 posts that is a different story! 😉.
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