Macintosh 630 Family: Sound Input Specifications

This article documents the sound input specifications for the Macintosh 630 family of computers.
The sound input jack has the following electrical characteristics:

* Input impedance: 100k ohms
* Average line level: 100 mV RMS
* Average microphone level: 70 mV RMS
* Maximum input level: 1.8 V RMS
Published Date: Feb 19, 2012