Impedance Matching Preamp/Amp Assiance Pls?

Mitch2 ; very useful info on the varying impedances . I learned something today , thank you .

Happy tunes .

Saki70, you are welcome. I am glad to help with things I have learned, as many others here have helped me along the way. To Nick778, I am a little surprised at JA's comment about using the Cary with amps having input impedance of at least 10K ohms. I consider the 1:10 ratio recommended by many to be a minimum at the lowest frequency where your speakers provide useful output. Personally I prefer a ratio of about 1:20 or better when possible. Since the 05 was measured to have output impedance of 3,400 ohms at 20hz, I would probably look for an amp having input impedance of at least 47K ohms (seems to be a common input impedance) to use with the 05, and I believe your Spectron amp at 50K ohms should work fine.

I had the Cary SLP 05 for about a week with my Pass Labs X 350.5 Amp using balanced interconnects.
Not only was the bass rolled off but the treble was weak.
Tvad set me straight on this one considering impedence mismatch.
Best advise, try before you buy. (if you can )