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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
123 posts
 
Soix:

I have experience bringing in new gear to evaluate for SQ performance in my system, whether it be streamer, integrated, power conditioner or tweaks, wires, etc.  The GAN-fet amp will be the first “separate” (amp or pre) I’ve ever connected.

So I thought it imperative to make sure no incompatibility between the two pieces would keep me from hearing the full potential of the amp in its current stock form as I assess whether it actually does sound good—hopefully very good, to me.  Over time, well past the honeymoon period.

But then great mods can breath new life into a piece, if one is fortunate to have access to such services.

speakermaster
738 posts
 
They should be compatible between the pre amp and dac, the only reason would be if the gain of your pre amp would be optimized for analog souces only, in which case it would have too much gain for most digital gear, but if both are designed with both digital ins/outs you should be more than fine. The only situation you might run into a problems is if you ran fully balanced digital in which case you could end up with too much gain into some systems with efficient speakers.
audioman58's avatar
audioman58
3,866 posts
 
How the amp is built has nothing to do if it will work ,
It has more to do with its Sonic signatures and which you are looking for.
rc22 OP
123 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
21,856 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.
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