2. amps-preamps
  3. 144153-45726

Impedance match

My understanding for impedance matching a preamp or upstream source having a volume control (e.g., a DAC with volume control) to a downstream amplifier is that an appropriate “impedance match” is for the amplifier to have an input impedance at least 20-fold to 50-fold greater that the output impedance of the upstream preamp or source output impedance. One dealer told me that the appropriate “impedance match” between to such components is exactly that—an identical match of the same impedances. 

So which is it?
128x128celander

Showing 1 response by monoogan

monoogan
55 posts
 
For audio impedance matching really comes into play for transformer coupled stages like tube amplifier outputs or phono inputs.

Other than that 10X the source impedance is the general rule although some manufacturers may recommend higher.
More to discover