5Core Pro series, Operational Manual

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GUIDELINE TO OPERATE THE AMPLIFIER
1. Place the Amplier in dry and well ventilated place. Considerable heat is generated inside the amplier during
continuous use, therefore do not block the top cover ventilation holes by placing anything on top of the amplier.
2. Only good quality Low impedance microphones like 5 CORE 5CM-ND 780X, ND 99X or ND series to be used to
avoid / reduce feedback & howling. This will help obtaining satisfactory power output from Amplier without
howling or feedback.
3. Driver Units, Columns Speakers & Box speakers give best performance and are safe from damage when fed with
up to half of their handling capacity. This is because these have to handle certain peak music signals and
transients which may be two to three times higher than the power wattage being fed to these by Amplier.
4. It is advised to keep the master Control of the Amplier at’0’ position before switching ‘ON’ the Amplier & later
may be moved to optimum position say ‘6 to 8’.
CAUTION
The equipment must be earthed properly before operating it to avoid electric shock. A wire from the Earth terminal
must be connected to either water pipe or to electrical earth for safe operation.
!
SPEAKER CONNECTIONS
Low impedance Speaker Connections
Speaker impedance taps of 4Ω, 8Ω & 16Ω have been provided at the rear. Always use 23/38 or thicker speaker cable
to reduce power loss in the cables. Make proper matching speaker connection as explained below.
High impedance (70V/100V line) speaker connections
+ +
– –
16
W
16
W
COM
4
W
, 8
W
, 16
W
COM
4
W
, 8
W
, 16
W
+
–
16 W
+
–
16 W
Resultant Impedance = 16 ¸ 2 = 8 W Resultant Impedance = 16 ¸ 2 = 8 W
• Connecting two Speakers (like 5C-WC-50DX) in parallel. • Connecting two driver units (like 5CU-60) in parallel.
• Connecting four Speakers (like 5CA-30T) in parallel.
+
–
16
W
COM
4
W
, 8
W
, 16
W
Resultant Impedance = 16 ¸ 4 = 4 W
+
–
16
W
+
–
16
W
+
–
16
W
• Connecting 12 Column Speakers with 100V LMT
connected at 10 watts tap. • Connecting 6 Driver Units with 100V LMT connected at
10 watts tap.
COM
70V 100V
1 2 12
COM
70V 100V
1 2 6
Correct Phasing of Loudspeakers
• When two or more speakers/Units are installed in the same area and are facing the same direction, it is essential
that their Cones/ diaphragms act in unison. Otherwise the sound level of one speaker will be cancelling the sound
level of the other. To avoid any mistake, the terminal of Box Speakers and the driver unit are marked ‘+’ & ‘-‘.
Always connect the COM of the amplier to ‘-‘ of Speaker and 4Ω/8Ω/16Ω of the ‘+’ of the Speakers.
• In case of LMTs the COM of all the LMTs should be connected to the COM of the red terminal strip of the Amplier
and the Power tap to 70V/100V lines as shown in gure.
CAUTION
• When 70V/100V line is being used, no Speakers / driver units should be connected to 4Ω/8Ω (low impedance) tap.
• Loudspeaker / driver unit should be connected to either COM-4Ω, COM-8 Ω, COM-16Ω, COM-70V, COM-100V
terminals, but never to more than one set of terminals.
!