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Elac AM 180 - Active Monitor Manual

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Explanatory Note on Specifications 19
On the rear of this manual (respectively attachment) you will find the specifications of your loudspeaker
Specifications include:
- Dimensions Height x Width x Depth (in mm)
- Weight (in kg)
- Principle
- Driver Units: number and type of drivers
- Mains Fuse / Mains Voltage
- Max. Power Consumption, Full Output
- Crossover Frequency
- Frequency Range (in hertz)
- Max. amplifier power
- S/N (A-weighted)
- Inputs
- Input sensitivity
- Input impedance
Dimensions refer to the outer dimensions of the loudspeakers.
The Weight indicates the total weight of the loudspeaker without packaging and without accessories (like mains
cable etc.). Due to material tolerances, this value may vary by 10 percent.
The Principle describes the acoustical and electrical concept on which the speaker is based on (e.g. closed box
or bass reflex, powered (= with amplifier built-in).
Drive Units give information on the number and type of drivers of a loudspeaker.
The correct Mains Voltage, measured in volts, is necessary for a proper function of your appliance and is pro-
vided by your local power authorities. The mains voltage might vary between the given values. The technical data
of the Fuse give the current- and voltage values which the fuse should have at the given mains voltages.
Max. Power consumption, full output specifies the power, measured in watts, which is drawn out of the mains
when the appliance works with maximum output levels.
The Crossover Frequency is defined by the built-in (active) crossover network which adapts the overlay between
collocated drivers.
The Reproduction Range of a loudspeaker is defined by the upper and lower cut-off frequencies of the SPL fre-
quency response. At the cut-off frequencies the sound pressure level decreases by 8 dB (factor 2.5) as compared
to the midrange. Given a standard domestic room, the effective lower cut-off frequency may deviate from stan-
dard values due to room resonances.
The Max. amplifier power of an amplifier is also measured in watts and specifies the power which can be repro-
duced by the amplifier without any disturbances, like humming, noise or distortions. It is differentiated between the
sine power and the pulse power. The sine power describes the power which the amplifier can reproduce for an
endless time theoretically, the pulse power is even higher and specifies the power for short term signals which
can be handled by the amplifier without distortions.
The signal to noise ratio (S/N (A-weighted)) describes the relation between the wanted signal and not wanted
signals like noise or humming. Normally it is measured in dB and is weighted with a curve called “A”-curve which
describes the sensitivity of the human ear.
Inputs lists the available inputs and their connector specifications.
The Input sensitivity is measured in volts normally and lets you know the input voltage which is needed to drive
the amplifier to full level.
The Input impedance is the AC resistance, normally measured in kilo-ohms, which represents the load for the
driving pre amplifier.
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