RE: What is impedance and how does it work

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Posted by Caucasian Blackplate (P) on April 7, 2014 at 08:57:18

In Reply to: What is impedance and how does it work posted by airtime on April 7, 2014 at 08:21:05:

There's output impedance from the preamp and input impedance in the amplifier.

The input impedance of your amplifier can be considered the "load" placed on your premap. If the load on your preamp is too low, distortion will go up, and potentially the frequency response on the bottom end will be compromised.

As the load on the preamp increases (amp inmput impedance goes up), you will actually lose less signal from the preamp, and the distortion that the preamp produces will drop drastically.

As a general rule of thumb, we like to see an input impedance that is at least 10X the output impedance of the preamp driving it. So for a preamp with a 1K output impedance, 10K would be a recommended minimum. Generally, there isn't any harm in going much higher (100X).

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Follow Ups Full Thread

Topic - What is impedance and how does it work - airtime 08:21:05 04/07/14 (13)

RE: What is impedance and how does it work - AbeCollins 08:30:17 04/10/14 (0)

basics - Bill Way 13:07:01 04/09/14 (0)

RE: What is impedance and how does it work - jsm71 10:08:10 04/09/14 (0)

Thanks for asking the question - dvb 22:22:18 04/07/14 (1)

same thing - airtime 06:18:21 04/08/14 (0)

RE: What is impedance and how does it work - John Elison 13:46:22 04/07/14 (0)

RE: What is impedance and how does it work - 4season 09:33:26 04/07/14 (3)

"Not sure why your power amp would have switchable settings" - E-Stat 09:41:05 04/07/14 (2)

RE: "Not sure why your power amp would have switchable settings" - airtime 10:12:37 04/07/14 (1)

As an aside to the fixed/variable option - E-Stat 11:09:17 04/08/14 (0)

RE: What is impedance and how does it work - Caucasian Blackplate 08:57:18 04/07/14 (2)

RE: What is impedance and how does it work - John Elison 13:44:33 04/07/14 (1)

RE: What is impedance and how does it work - Caucasian Blackplate 14:42:09 04/07/14 (0)

Follow Ups

RE: What is impedance and how does it work - Caucasian Blackplate 08:57:18 04/07/14 (2)

RE: What is impedance and how does it work - John Elison 13:44:33 04/07/14 (1)

RE: What is impedance and how does it work - Caucasian Blackplate 14:42:09 04/07/14 (0)

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