Martin Audio MA1.6s Specifications download pdf (Page 14)

7 OPERATION

7.1 Operation precautions

• Make sure that the power switch is off before making any input or

output connections or operating the switches on rear panel. See pages

6-11 about installation.

• Make sure that the AC mains is correct and the same as that printed on

the rear panel of the amplifier. See pages 6-8 about operating voltage

and power consumption.

• Make sure that the switches on the rear panel for operation modes,

clip limiters and the MLS™ switches are in the correct position.

See pages 12-13 about operation modes, page 15 about clip limiters

and page 11 for the MLS switches.

• It is always a good idea to turn down the gain controls during power up

as this prevents speaker damage, especially if there is a high level

signal at the input.

7.2 Powering up - Soft start

When you power up the amplifier it takes a couple of seconds to self check.

This is known as the "soft start" or "slow start" sequence. The fans then

blow at high speed before going into "idle" and the two bottom green LED's

illuminate to show the amplifier is operational.

7.3 Input attenuators

The two input level attenuators on the front panel adjust the signal level for

their respective amplifier channel in all modes. They are calibrated in dB to

assist setting up active loudspeaker systems.

In bridged mode, both controls must be in the same position, so that the

speaker load will be shared equally between the channels.

7.4 Gain switch

The gain switch located on the rear panel is for changing the input

sensitivity of the amplifier. Most professional mixing consoles operate at a

nominal level of +4dBu. Therefore, use the 32dB position (depressed

switch), to give you plenty of fader movement. On the other hand, for a

disco mixer that operates at a nominal level of 0dBu, use the upper position

setting, which has a sensitivity of 0dBu (0.775Vrms) for full power in 4

ohms.

Martin Audio – MA1.6 Power Amplifier

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Martin Audio MA1.6s Specifications Page 14