Tubes Asylum: Re: Tube pre-amp and ss power -amp impedance matching by freddyi

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Re: Tube pre-amp and ss power -amp impedance matching

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In Reply to: Tube pre-amp and ss power -amp impedance matching posted by danl on November 5, 2001 at 18:10:22:

Hi
sounds like your tube preamp's ~3K line output is a fine match for the 75K input load on your amp assuming cables aren't really long as the capacitance would form a how-pass filter in conjunction with the 3K ouput Z (and amp input C) btw - 3K is lower than a lot of passive line/volume controls so you're OK. The driving Z should be considerably less than the input Z.
I don't know the topology of your MFA preamp but will guess it has a medium-mu tube as a plate-follower (common-cathode)line stage.
subjective bass tightness can be due to a number of things including the preamp's power supply style.
Freddy

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Topic - Tube pre-amp and ss power -amp impedance matching - danl 18:10:22 11/5/01 ( 6)

Re: Tube pre-amp and ss power -amp impedance matching - Ren 06:58:07 11/7/01 ( 0)
Re: Tube pre-amp and ss power -amp impedance matching - jcoe 03:52:30 11/6/01 ( 0)
Interconnects Will Be Critical... - Todd Krieger 01:54:38 11/6/01 ( 0)
Re: Tube pre-amp and ss power -amp impedance matching - Eli Duttman 21:20:05 11/5/01 ( 0)
Re: Tube pre-amp and ss power -amp impedance matching - freddyi 11/5/01 18:25:28 11/5/01 ( 1)
- Re: Tube pre-amp and ss power -amp impedance matching - danl 10:51:22 11/6/01 ( 0)