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Output Impadence for Musical Design SP-2B

I want to know if anyone can tell me the output impadence for the Musical Design SP-2B linestage. I recently purchased this tube preamp used and would like to know the output impadence so that I can have an idea as to which power amps it can work with. I have e-mailed Musical Design but they haven't gotten back to me so I figured I'll throw this question up in the air for someone to help me out with. Thanks
speedracerucr

Showing 2 responses by speedracerucr

speedracerucr OP
16 posts
 
If that is indeed the case (2-2.5K Ohms for the SP-2B), what input impedance should I look for in an amplifier inorder to avoid the problems associated wtih impedance mismatch? In addition, is it a good or bad idea to mix tube pre with SS power? Thanks.
speedracerucr OP
16 posts
 
Brokenarrow,
You are right on with your description of the SP-2B. Jonh Hillig of Musical Design wrote back with pretty much the same info. Here is his e-mail reply in case anyone else needs the same info:

"The figure is around 2K Ohms. We have used this preamp in a wide range of set-ups including driving two of our own amps at some audio shows. That's a 12k load. It works extremely well with a wide variety of power amps."

Now, that is good and all, but I don't understand how the SP-2B with 2K Ohms output impedance can drive amps with input impedance of 12K ohms. That deosn't fit into the 1:10 minimum ratio that I have been reading about in other posts regarding impedance matching. If anyone else can enlighten me on the matter, it would be much appreciated.
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