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30
Amplifier Specifications
Power Output Stereo
Minimum sine wave continuous average power output
per channel, with both channels operating is:
100 watts into 8 ohm load
160 watts into 4 ohm load
Output Load Impedance
8 or 4 ohms
Rated Power Band
20Hz to 20,000Hz
Total Harmonic Distortion
0.03% maximum with both channels operating from 250
milliwatts to rated power, 20Hz to 20,000Hz
Intermodulation Distortion
0.03% maximum,
if the instantaneous peak power
output does not exceed twice the rated power output
for any combination of frequencies from 20Hz to
20,000Hz.
Dynamic Headroom
1.8dB
Wide Band Damping Factor
Greater than 200 - 8 ohm, Greater than 100 - 4 ohm
Power Guard
Less than 2% THD with up to 16dB overdrive at
1,000Hz
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Sensitivity (for rated output/8 ohm load)
High Level - 300mV unbalanced, 600mV balanced
Phono - 3.0mV
SUB (Mono) Output (for rated input)
1.7V unbalanced (6V Maximun)
Signal To Noise Ratio (A-Weighted)
High Level - 97dB below rated output
Phono - 80dB below 5mV input
Input Impedance
High Level - 20K ohms
Phono - 47K ohms; 50pF
SUB (Mono) Output Impedance
200 ohms
Maximum Input Signal
High Level - 4V unbalanced, 8V balanced
Phono - 40mV
Voltage Gain
High Level to Amp Output: 40db
High Level to Sub (Mono) Output: 15dB
Phono to Amp Output: 80dB
Phono to Sub (Mono) Output: 55dB
Tone Controls
Bass ± 10dB (1dB steps) @ 70Hz
Treble ± 10dB (1dB steps) @ 10,000Hz
Headphone Impedance
20 to 600 ohms
Power Control Output
12VDC, 25mA
Specifications
General Specifications
Power Requirements
Field AC Voltage conversion of the MA252 is not pos-
sible. The MA252 is factory configured for one of the
following AC Voltages:
100 Volts, 50/60Hz at 4.4 amps
110 Volts, 50/60Hz at 3.7 amps
120 Volts, 50/60Hz at 3.7 amps
220 Volts, 50/60Hz at 2.0 amps
230 Volts, 50/60Hz at 1.9 amps
240 Volts, 50/60Hz at 1.9 amps
Standby: Less than 0.5 watt
Note: Refer to the rear panel of the MA252 for the cor-
rect voltage.
Overall Dimensions
Width is 12 inches (30.5cm)
Height is 7-5/8 inches (19.4cm) including feet
Depth is 18 inches (45.7cm) including the Cables
Weight
28 pounds (12.7 kg) net, 37 pounds (16.8 kg) in shipping
carton
Shipping Carton Dimensions
Width is 22-1/4 inches (56.5cm)
Depth is 19-1/4 inches (48.9cm)
Height is 13-1/2 inches (34.3cm)
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