2. amps-preamps
  3. 131621-71023

Impedance Question?

OK so I know there's a lot of threads about matching impedance with pre/amp.  It would be really nice if someone could help out here! The whole impedance thing confuses me (doesn't take much).

So if I have an amp that has 10k impedance what range for output impedance would work for a preamp?

Any help would be great!
sqitis
sqitis OP
71 posts
 
And of course I'm talking tube pre and ss amp combo.  Hope this helps!
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toddverrone's avatar
toddverrone
840 posts
 
Quick and dirty answer: you want the amp to have an input impedance at least 10x the output impedance of the pre. 

Here's a solid thread: https://forum.audiogon.com/discussions/how-to-match-preamp-and-power-amp
sqitis OP
71 posts
 
So are we talking an impedance between 100-400ohm or higher for pre amp output impedance?  I think a range would help me understand.

Toddverrone - I read that thread and tried to figure it out...LOL
auxinput
2,921 posts
 
Others have had issues regarding impedance.  If the amplifier input impedance is 10k, it is really only suitable to match to a solid-state preamp.  With a tube preamp, it can work, but you may start to see weak bass/midbass (among other issues).  Look for a higher impedance amplifier.  For example, the Parasound A21 has input impedance of 33k for RCA and 66k for balanced.  I have seen other amps with input impedance of even 100k or 200k.
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