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McIntosh MA7900 Owner's Manual Page 33

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33
Amplifier Specifications
Power Output
200 watts is the minimum sine wave continuous aver-
age power output per channel, both channels operating
Output Load Impedance
2, 4 or 8 ohms
Rated Power Band
20Hz to 20,000Hz
Total Harmonic Distortion
0.005% maximum with both channels operating from
250 milliwatts to rated power, 20Hz to 20,000Hz
Dynamic Headroom
2.0dB
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Preamplifier Output 1 and 2 (for rated input)
1.4V unbalanced (8V Maximun)
Sensitivity (for rated output)
High Level, 250mV unbalanced, 500mV balanced
Phono MM, 2.5mV
Phono MC, 0.25mV
Power Amp In, 1.4V
Signal To Noise Ratio (A-Weighted)
High Level, 95dB below rated output
Phono MM, 84dB below 5mV input
Phono MC, 82dB below 0.5mV input
Power Amplifier, 113dB below rated output
Voltage Gain, con’t
Phono MM to Output 1 and 2: 55dB
Phono MC to Output 1 and 2: 75dB
Power Amplifier: 29dB
Equalizer Controls
Digital Input Sample Rates
Optical: 16Bit, 24Bit - 32kHz to 96kHz
Coaxial: 16Bit, 24Bit - 32kHz to 96kHz
USB: 16Bit, 24Bit, 32Bit - 32kHz to 192kHz
Power Control and Trigger Output
12VDC, 25mA
Intermodulation Distortion
0.005% maximum, if the instantaneous peak power is
400 watts or less per channel with both channels oper-
ating for any combination of frequencies from 20Hz to
20,000Hz
Wide Band Damping Factor
Greater than 40
Input Impedance
High Level, 20K ohms
Phono MM, 47K ohms; 50pF
Phono MC, 50, 100, 200, 400 or 1,000 ohms; 100pF
Power Amp In, 10K ohms
Maximum Input Signal
High Level, 8V unbalanced, 16V balanced
Phono MM, 80mV
Phono MC, 8mV
Power Amplifier In, 16V
Preamplifier Output Impedance
220 ohms
Headphone Impedance
20 to 600 ohms
Power Guard
Less than 2% THD with up to 16dB overdrive at
1,000Hz
Voltage Gain
High Level to Rec Output: 0dB
High Level to Output 1 and 2: 15dB
Phono MM to Rec Output: 40dB
Phono MC to Rec Output: 60dB
MA7900 Amplifier Specifications
-15
20 50 100 200 500 1k
2k 5k 10k 20k
FREQUENCY IN HERTZ
0
- 5
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