Apple Mac Pro (Early 2009) - Manual (Page 102)

102 Chapter 5 What’s Under the Hood
Analog audio out using the headphone jack (typical values)
Based on a typical situation with playback of a 1 kHz, -3dBFS 24-bit sine wave, 44.1 kHz
output sample rate into 150 ohms, unless otherwise specified below.
 Output voltage: 1.3 volts (root mean square) (V
rms
) (+4.5 dBu)
 Output impedance: 55 ohms
 Output power: 53 milliwatts (mW) into 32 ohms
 Signal-to-noise ratio: Greater than 90 dB
 Total harmonic distortion + noise: Less than -70 dB (.03 percent)
 Channel separation: Greater than 50 dB
Analog audio line in (typical values)
Based on a typical situation with playback of a 1 kHz, -3dBFS 24-bit sine wave, 44.1 kHz
output sample rate, unless otherwise specified below.
 Maximum input voltage: 2 V
rms
(+8.2 dBu)
 Input impedance: Greater than 17 kilohms
 Signal-to-noise ratio: Greater than 90 dB
 Total harmonic distortion + noise: Less than -85 dB (.006 percent)
 Channel separation: Greater than 85 dB
Analog audio line out (typical values)
Based on a typical situation with playback of a 1 kHz, -3dBFS 24-bit sine wave, 44.1 kHz
output sample rate into 100 kilohms, unless otherwise specified below.
 Output voltage: 2 V
rms
(+8.2 dBu)
 Output impedance: 33 ohms