The overload light (red) is activated by several events,
•exceeding the maximum input range of the analog input
•exceeding the maximum input range of the digital input with large probability
•exceeding the output capacity of the power amplifier (clipping in the power amplifier) and thermal overload of the power amplifier or loudspeaker drivers (thermal protection has activated)
•if an error is detected in the AES/EBU audio data
If a red warning light appears, turn the analog source down! If the levels are already modest and a digital signal is being used, ensure that there are no bit errors in the AES/EBU digital audio data.
MOUNTING CONSIDERATIONS
Align the loudspeakers correctly
Always place the loudspeakers so that their acoustic axes are aimed towards the listening position. Vertical placement is preferable, as it minimises acoustical cancellation problems around the crossover frequency.
Maintain symmetry
Check that the loudspeakers are placed symmetrically and at an equal distance from the listening position. If possible, place the system so that the listening position is on the centerline of the room and the loudspeakers are placed at an equal distance from the centerline.
Minimise reflections
Acoustic reflections from objects close to the loudspeakers like desks, cabinets, computer monitors etc. can cause unwanted colouration and blurring of the sound image. These can be minimised by placing the loudspeaker clear of reflective surfaces. For instance, putting the loudspeakers on stands behind and above the mixing console usually gives a better result than placing them on the meter bridge. Symmetrical positioning of the reflective objects is also importent in order to maintain a balanced soundstage.
Minimum clearances
Sufficient cooling for the amplifier and functioning of the reflex port must be ensured if the loudspeaker is installed in a restricted space such as a cabinet, or integrated into a wall structure. The surroundings of the loudspeaker must always be open to the listening room with a minimum clearance of 5 centimeters (2") behind, above and on both sides of the loudspeaker. The space adjacent to the amplifier must either be ventilated or sufficiently large to dissipate heat so that the ambient temperature does not rise above 35 degrees Celsius (95°F).
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