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Impedance matching between 2k ohm phono pre and 100k ohm amps via passive pre

Howdy - 

I have a noob question about passive preamps.  

I am running my Wright Sound wp200c tubed phono stage (2k ohms output) through a passive preamp into two Dayens Ampino mono blocks (100k ohms input).  

It sounds good to my ears, but just wondering if this raises red flags to anyone?  Tortuga Audio says the ratio of amp to source should be more like 100:1, and I'm at 200:1 right now.  Cables are less than three feet. 

Thanks!
subterranean6
joeylawn36111
574 posts
 
IMO if it sounds good, then you're good to go. Any serious impedance mismatch would sound like there is something very wrong.

No matter what, you won't hurt anything with that setup as you have it.
georgehifi's avatar
georgehifi
10,312 posts
 
tubed phono stage (2k ohms output) through a passive preamp into two Dayens Ampino mono blocks (100k ohms input).  
With the phono stage output impedance being high at 2kohms, I would search for a passive that uses a 20kohm volume control (potentiometer) not 10kohms one.
As it will still be a better match, and also still be a good match for the 100kohm of the poweramps.

Cheers George  
atmasphere's avatar
atmasphere
12,193 posts
 
The low impedance is on the drive side so that is not a concern.
georgehifi's avatar
georgehifi
10,312 posts
 
The output impedance of the source is 2kohm, so the load it should be at least a 20kohm passive. The the output of the passive will be fine with the 100kohm input of the poweramp. 

Cheers George
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