impedence value.? amp to preamp.

if your amp has 15kohm input impedance and your preamp has 20kohm input impedance is this a unworkable combo?

energizer05-04-2009 7:06pm

Post removed Aug 12, 2015
newbee Details Discussions Posts This discussion Message User 4,768 posts 05-04-2009 at 11:29pm Copy Comment URL Report Comment Edit Delete Both Sidssp and Tvad have fairly well hit the nail. FWIW many tube pre-amps have a 600 ohm output impedence (my ARC SP10 does, and recommends a minimum amp input impedence of 20K ohms). As common are some with output impedences of 3500 ohms. (Three other tubed pre-amps I have have output impedences of 3500 ohms.) None of them really sound all that good with amps with less than 47K input impedence and one even likes 100K best. Tvad's comments about impedence being a moving target is right on, and you need to start by knowing the output impedence of your Bottlehead (I tried to look it up but couldn't find it). FWIW.
energizer OP Details Discussions Posts This discussion Message User 113 posts 05-05-2009 at 02:59am Copy Comment URL Report Comment Edit Delete problem is iam not using my bottlehead.i am considering a passive pre. but i cant afford bent, sonic euphoria,canary ect.
newbee Details Discussions Posts This discussion Message User 4,768 posts 05-05-2009 at 03:12am Copy Comment URL Report Comment Edit Delete Passive pre-amps/attenuators etc also have output impedence, usually varible, and require very careful IC matching to get a good result.
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