2. amps-preamps
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Impedance Matching in the Modern Audio System

Hey everyone, I'm still learning a lot about audio and audio equipment. I know that I am supposed to impedance match my components, but my question is this:

If I will have 1 source (In my case a Bluesound Node 2i streaming DAC) that will have an analog out to an integrated amp, do I need to worry about matching the impedance of the analog out on the DAC to the input on the integrated amp? I can't seem to find the impedance for the analog output on the Bluesound Node 2i, but if I were to find it, how would I know if the input is properly matched on the integrated amp? 
subsonic1050
erik_squires
16,041 posts
 
Subsonic :


Because solid state gear, like your source, can handle a broad range of targets, therefore, you won't have any issues.


The problem is when you have a tube source ---> low impedance target.
You don't have that. You have a solid state source ----> tube target.
That will be fine. 

If you had a CD player with a tube output stage, then you'd care.

Erik
erik_squires
16,041 posts
 
I'm using the term "source" here as the opposite of "target" , not as a type of equipment.

If you think of this chain:

CD Player ---> Preamp ---> Amplifier


The CD Player is the source of the preamp.  The preamp is the source of the amplifier.


The Preamp is the target, or destination of the CD player.  The amplifier is the target or destination of the pre.


So, yes, you have a solid state source. That means it has an output stage which will handle almost any target impedance.




erik_squires
16,041 posts
 
To continue, say you have this:
SS Streamer ---> Tube Pre --> SS Amp
The concern would be whether the impedance of the SS Amp is high enough for the preamp. 


The streamer on the other hand is not concerned with the nature of the preamp.


subsonic1050 OP
8 posts
 
Ok, fantastic! Thanks again for the help!
itsjustme
681 posts
 
The solid state streamer should have a sufficient low output impedance as to not really care. plus tube have high input impedance, which means they are easy to drive. Its the output side of tubes that can get tricky.
worry not
good to ask!
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