Yamaha MX-800/U - Page 9

Making sure that the control amplifier is also turned off, connect the
output jacks of your control amplifier to the corresponding INPUT jacks
on the rear panel of this unit. Always check that
a) the RCA plugs of the connecting cord are clean,
b) the left and right channels of both units correspond,
c) connections are secure, and
d) both units are properly grounded.
The MX-800/U 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-800/U
speakers terminals
A+BorA+C
A: 8ohms
B,C: 4ohms
-= Minimum speaker
load impedance
2 pairs in paraliel
2 pairs in series `
Be sure to use only speakers within the rated impedance range and
with adequate power handling capacity. Driving speakers with ex-
tremely low impedance (or several low-impedance pairs simul- .
taneously) at continuous full power may cause the protection circuit
to activate.
When connecting the speaker cords, observe the “ +” and “—”
markings on the backs of the speakers and MX-800/U. If the “+” and
“—” polarities are reversed, the sound will be unnatural and lack
- bass.
Speaker cords should be cut as shortas possible. Do not coil 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:
A.Light-gauge speaker cords
Partly unscrew the plastic wire holders. Insert the stripped ends
of the speaker cords as shown and retighten the holders.
RED for (+) sign
BLACK for (—) sign