RCF DM 41 - Page 7

7
ENGLISH
Notes:
- the loudspeaker iNput voltage (vd) shall correspoNd to the amplifier output voltage (va).
- the sum of NomiNal power values (pd x N) of all loudspeakers coNNected to the liNe
shall Not exceed the amplifier power (pa).
LOW IMPEDANCE CONNECTION
Turn the power switch to the 8 Ω position.
Notes:
- the total loudspeaker impedaNce must Not be lower thaN the amplifier output impedaNce.
- a loudspeaker total impedaNce equal to the amplifier output oNe permits to get the
maximum deliverable power (but aN higher loudspeaker impedaNce eNtails less power).
- the total loudspeaker power shall be adequate for the maximum deliverable power of
the amplifier.
- the loudspeaker liNe shall be short (for loNg distaNces, it may be Necessary to use cables
with large cross-sectioN wires).
- the impedaNce of a siNgle loudspeaker is 8 Ω; the total impedaNce of the parallel of 2
loudspeakers is 4 Ω (impedaNce = 8 / loudspeaker Number).
AMPLIFIER
Pa = Amplifier power
Pd = Speaker power
n = Number of speakers
Vd = Speaker input voltage
Va = Amplifier output voltage
Pa > Pd x n Va
Vd=Va Vd=Va Vd=Va