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Appendix A Specifications 81
Analog Audio Specifications
• Sample rate: 32 kHz, 44.1 kHz or 48 kHz
• Jack type: 1/8” mini
• Bits per sample: 16-bit or 24-bit
• Frequency response: 20 Hz to -20 kHz, +0.5 dB/-3 dB
Sound out using the headphone jack
• Output voltage: 1.4 volts (root mean square) (V
rms
) (+4 dbu)
• Output impedance: 24 ohms
• Output power: 20 milliwatts (mW)
• Signal-to-noise ratio: Greater than 90 dB
• Total harmonic distortion: Less than -80 dB (0.01 percent)
• Channel separation: Greater than 65 dB
Analog audio line-in
• Maximum input voltage: 2 volts (root mean square) (V
rms
) (+8 dbu)
• Input impedance: Greater than 47 kilohms
• Signal-to-noise ratio: Greater than 90 dB
• Total harmonic distortion: Less than -85 dB (0.006 percent)
• Channel separation: Greater than 75 dB
Analog audio line-out
• Output voltage: 1.4 volts (root mean square) (V
rms
) (+4 dbu)
• Output impedance: 24 ohms
• Signal-to-noise ratio: Greater than 90 dB
• Total harmonic distortion: Less than -80 dB (0.01 percent)
• Channel separation: Greater than 65 dB
Power Supply
AC line input
• Voltage range: 100–240 V alternating current (AC)
• Current: 7.5 amperes (A) uniprocessor or 9.5 amperes (A) dual processor
• Frequency: 50–60 Hz
DC display output
• 4.0 A maximum at nominal 25 V DC from the Apple Display Connector