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Manual abstract: user guide MARTIN AUDIO LE12JB_ENSCHEMATICS
Detailed instructions for use are in the User's Guide.
[. . . ] After unpacking the system, examine it carefully for any signs of transit damage and inform your dealer if any such damage is found. It is suggested that you retain the original packaging so that the system can be repacked at a future date if necessary. [. . . ] It is important to understand that a low power amplifier driven into clipping is more likely to damage a loudspeaker than a higher power amplifier used within its ratings. This is because music signals have a high peak-to-average "crest" factor. When an amplifier is severely overdriven, its output waveform is clipped (its peaks are squared off) reducing the crest factor. In extreme cases, the waveform can approach that of a square wave. An amplifier is normally capable of producing far more power under these conditions than its undistorted rated power output. The use of very high power amplifiers with outputs greater than those recommended is discouraged. Care should be taken to avoid switch-on surges, which can result in momentary power peaks in excess of specified ratings. When powering up a sound system it is important to switch on the amplifiers after the mixer and control electronics have stabilised. When powering down the system, reverse the sequence and switch off the amplifiers first.
5
CONNECTIONS
The LE12JB is fitted with two Neutrik Speakon NL4 connectors wired in parallel. Do not make a connection to +2, -2 when using the LE12JB in passive mode. [. . . ] Measured on-axis in half space at 2 metres, then referred to 1 metre. Measured in half space conditions at 2 metres with 1 watt input, using band limited pink noise, then referred to 1 metre. [. . . ]
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