Yamaha MC2403 - Manual (Page 9)

(D AUX RTN 1 & AUX RTN 2 jacks
The mono or stereo output from effect units fed by the
AUX SEND jacks can be returned to the main stereo
program mix via these jacks. Note that each AUX RTN
offers independent return inputs for the left and right
busses, accommodating the return signal from effect
units featuring stereo outputs. Nominal input level/
impedance is +4dB/600i2.‘
© AUX SUB IN & ST SUB IN jacks
These five jacks permit “cascading” two MC-series
mixing consoles to increase the number of available
input channels. The AUX OUT jacks from the first
(slave) console should be connected to the corre­
sponding AUX SUB IN jacks of the second (master)
console, and the STEREO outputs from the slave con­
sole should be connected to the corresponding ST
SUB IN jacks on the master console.
© INPUT CH INSERT IN/OUT Jacks
These jacks permit inserting compressors, limiters or
other types of external signal processing equipment
between the head amplifier and EQ stage of each
input channel. The jacks are tip-ring-sleeve types in
which the tip is SEND (the output from the head ampli­
fier), the ring is RETURN (the input to the EQ stage),
and the sleeve is ground. External equipment may be
inserted using “Y” cables which branch the SEND and
RETURN lines from a tip-ring-sleeve phone plug to
two separate mono phone plugs.
•The INSERT OUT signals are factory-wired to be
pre-EQ. This can be changed by internal jumpers to
be post-EQ.
• REFER THE ABOVE-MENTIONED REWIRING JOB
TO QUALIFIED YAMAHA SERVICE PERSONNEL!
) ST OUT (stereo) L &R connectors
The MC-series mixing consoles provide balanced
XLR-type connector outputs from the main stereo
buss, as well as unbalanced phone connectors. The
signal delivered is a stereo mix of the input channel
signals and the signals returned to the AUX RTN
jacks. The stereo OUT signal will normally be used to
drive a power amplifier and speaker system, powered
keyboard speakers or a main house mixing console.
The nominal output level/load impedance of the XLR-
type output signals is +4dB/600Q. The nominal output
level at the phone connectors is -6dB.
NOTE: The MC-series mixing console XLR-type con­
nectors are wired according to DIN specifica­
tions. Pin 1 is shield (ground), pin 2 is hot
(signal high) and pin 3 is cold (signal low).
I N S E R T O U T
I N S E R T I N
) Hl-Z and LO-Z INPUT connectors
Each input channel offers a choice of two input con­
nectors: a balanced LO-Z (low-impedance) XLR-type
connector and a Hl-Z (high-impedance) tip-ring-sleeve
1/4” phone jack. The LO-Z inputs are primarily
intended for electronic instruments having low-imped­
ance balanced outputs. The Hl-Z inputs will accept
either balanced or unbalanced signals from high-
impedance microphones, musical instruments or other
such equipment.