Power Selection - RFC MR 52WEN User Manual

LINK TO 100 V / 70 V CONSTANT VOLTAGE LINE
If this speaker is connected to a 100 V constant voltage line, select its proper
power rate by turning its rotary switch (by using a screw-driver) among the
values 30 – 15 – 7.5 – 3.75 W (100 V).
If speakers are connected to a 70 V line, their power rates will be halved.
OFF position: the speaker is muted.
WARNING: do NOT select the 8 Ω position (as this may damage both
the speaker and the amplifier)!
N :
otes
- The speaker input voltage (Vd) shall correspond to the amplifier output
voltage (Va).
- The sum of nominal power values (Pd x n) of all speakers connected to the
line shall not exceed the amplifier power (Pa).
AMPLIFIER
Pa > Pd x n
Pa = Amplifier power
Pd = Speaker power
n = Number of speakers
Vd = Speaker input voltage
Va = Amplifier output voltage
LOW IMPEDANCE CONNECTION
Turn the power switch to the 8 Ω position.
Notes:
- The total speaker impedance must not be lower than the amplifier output
impedance.
- A speaker total impedance equal to the amplifier output one permits to
get the maximum deliverable power (but a higher impedance entails less
power).
- The total speaker power shall be adequate for the amplifier maximum
deliverable power.
- The speaker line shall be as short as possible (for long distances, it may be
necessary to use cables with large cross-section wires).
- The impedance of a single speaker is 8 Ω. For example, the total impedance
of the parallel of two speakers is 4 Ω (impedance = 8 / speaker number).
Va
Vd = va

POWER SELECTION

Vd = va Vd = va
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