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Martin Audio – MA200Q Amplifier
ENGLISH
11
6.5.1 Calculation
The current draw can be calculated by dividing the mains input power by the mains voltage.
We recommend that you design the power distribution for at least the required current at 1/8 power, or 1/3
power for heavy-duty demands such as concert touring and Industrial music etc.
The heat power can be calculated as following:
If a headroom figure of at least 5dB (1/3 full power) is used with a 4 ohms load on all four channels of the
amplifier.The 1/3 power per channel is then; 200 / 3 = 67 watts, and total output power is; 4 x 67 = 267
watts.
The mains power consumption from the chart above is 720 watts.
The heat power produced is the difference between the power consumption and output power;
720 - 267 = 453 watts total for the amplifier.
MA200Q HEAT POWER
1/3 POWER 1/8 POWER 1/3 POWER 1/8 POWER 1/3 POWER 1/8 POWER
WATTS Kcal/hour BTU/hour
8 Ohm 307 235 260 200 1050 800
4 Ohm 453 370 390 320 1550 1260
2 Ohm 705 605 610 520 2410 2060
1/3 Power level = Average power with music as programme material (continuous clipping)
1/8 Power level = Normal operating power with music as programme material (occasional clipping)
7 CONNECTIONS
7.1 Input connections
7.1.1 Balanced inputs
The Inp u t co n ne ctor s a re N eu tr ik co mb o jac ks an d inc or po r ate a n XL R a nd _" (6.3mm) jack. They are
a ctiv e b alan c ed a nd wire d a s be low :
PIN 1 G RO UN D/SHIEL D
PIN 2 H OT ( +)
PIN 3 C OL D (- )
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