AudiogoN Forums: Impedance Matching Preamp/Amp Assiance Pls?

Impedance Matching Preamp/Amp Assiance Pls?

I'm looking to purchase a Cary SLP-05 that has an input impedance of 100k Ohms (XLR) and a gain of 27db. My Spectron MK2 has an input impedance of 50k Ohms using the XLR inputs (which I use).

What is the consequence of using the Cary with the Spectron regarding its compatiblity relative to the impedance and gain specs? Any issues I should be aware of?

Thanks in advance for your comments.

Nick778 (Threads | Answers | This Thread)

11-25-08

Responses (1-12 of 12)

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11-25-08: Kr4
You need to know the OUTPUT impedance of the preamp, not the input impedance, to match it to the amp.

Kal
Kr4 (Threads | Answers | This Thread)

11-25-08 Nick, i think what matters is the output impedance, which i ... Samaba

11-26-08 Thanks. can you explain the 10:1 rule? 10 x 400=4000 ohms an ... Nick778

11-26-08 Nick , the rule means that the input impedance of the amp sh ... Saki70

11-26-08 All of the preceding responses are correct. a theoretically ... Almarg

11-26-08 All the above, are typical answers. check the archives for s ... Unsound

11-26-08 It is not unusual for tube preamps to greatly exceed their r ... Mitch2

11-27-08 The spec you want to know is the worst case output impedance ... Bob_reynolds

11-27-08 I have the slp-05 and my amps input imp is 100k but i also u ... Jtwrace

11-28-08 Mitch2 ; very useful info on the varying impedances . i lear ... Saki70

11-28-08 Saki70, you are welcome. i am glad to help with things i ha ... Mitch2

11-28-08 I had the cary slp 05 for about a week with my pass labs x 3 ... Ozzy