RCF MQ50C, User Manual

6

ENGLISH

When two speakers reproduce the same frequencies but with phase differences, 

these frequencies may be annulled. In sound systems, speakers are often 

situated in adjacent positions and the sound waves produced interact with 

each other. If a speaker is connected incorrectly; i.e. the polarity of the audio 

line conductors is inverted, the audio signals are transmitted with differences 

in phase and correct reproduction is therefore jeopardized.

For connecting the speaker use cables with an adequate cross-section. The 

greater the distance between the amplifier and the speaker, the larger the 

connection cable cross-section should be to limit the voltage loss along the 

line.

To prevent inductive phenomena from giving rise to humming or disturbance 

that jeopardize the effective operation of the audio system, the speaker cables 

should not be run together with electrical energy conductors, microphone 

cables, or low level audio lines (e.g. LINE level). To facilitate the ‘’in phase’’ 

connection of the speaker, use bipolar cables that have markings to distinguish 

the polarity (e.g. insulation of different colours, conductors of different colours, 

ect.). To minimize the inductive effects (hum) due to coupling with surrounding 

electrical fields, use cables with conductors braided together.

You are recommended to install the speaker safety, checking that 

the fixing surface is resistant and solid enough to support the 

weight of the speaker, so as to prevent the risk of it falling that 

could put the safety of persons and structures in jeopardy. 

1.

 Drill a hole of diameter Ø 245 mm (9.65”) in the false ceiling at the point 

chosen for installing the speaker.

2.

 Insert the speaker in the hole as shown in Fig. 4 - point 

1

.

3.

 Screw in the four screws that tighten the four attachment terminals 

A

 of 

the speaker, as is shown in Fig. 4 - point 

2

  until the external flange touch 

the ceiling.

4.

 Fit the metal protective mesh onto the front of the speaker as shown in Fig. 4 – 

point 

3

. Use the adhesive felt, if available, to guarantee the grill clamping.

-

Rotate the grille in order to match the 4 recessed parts present on the edge 
of the grille itself with the 4 screw-areas used to install the speakers on 
false-ceiling, then push on these points till the grille is locked.

-

Use a flat thin screw-driver to pull-out the grille, levering between the plastic 
frame and the grille, in the cave position where the RCF logo is moulded.

INPUT CABLES

INSTALLATION INSTRUCTIONS