Yamaha MX-630 - Connections; Input Connections; Speaker Connections (MX-830); Speaker Cable Handling

(See Fig. P4.)
After confirming that the control amplifier is also switched off, connect the
output jacks of the control amplifier to the corresponding INPUT jacks on
the rear panel of this unit. Always check to be sure that:
e the RCA plugs of the connecting cord are clean,
the left and right channels of both units correspond,
connections are secure, and
both units are properly grounded.
SPEAKER CONNECTIONS
MX-830
This unit can drive up to three pairs of speakers (A, B and C) at the
same time. Those connected to terminals A are in parallel with pairs B
and C, which are in series. The following table shows the minimum load
impedances per speaker for all possible connections.
Number of MX-830 Minimum speaker
speakers terminals load impedance
(per speaker)
2 pairs in parallel A+ BorA + Ç
2 pairs in series
A: 8 oms
B, C: 4 ohms
Be sure to use only speakers within the rated impedance range and with
adequate power handling capacity. Driving speakers with extremely low
impedance (or several low-impedance pairs simultaneously) at continuous
full power may cause the protection circuit of this unit to activate.
When connecting the speaker cords, observe the “+” and "—" markings
on
the
backs
of
the
speakers
and
this
unit.
If
the
“+”
and
“—”
polarities
are reversed, the sound will be unnatural and lack bass.
opeaker
cords
should
be
cut
as
short
as
possible.
Do
not
roll
up
excess
cord
or
bundle
it with
cables
from
other
components.
Strip approximately 10 mm (3/8") insulation from the ends of the speaker
cords and connect them as explained below:
Light-gauge speaker cords
Partly unscrew the plastic wire holders. Insert the stripped ends of the
speaker cords as shown, and retighten the holders.
Hed: positive (+)
Black: negative (-)