3. LINE INPUT
The LIN E In p ut is a 3-p ole 1⁄4"‘A’ gauge jack socket, to accept
balanced or unbalanced line level sources when the LINE
switch (5) is pr essed . U nlik e th e low im p ed an ce M icrop h on e
input, this stage presents a high imped ance(>10kΩ) to t he
input sign al, enabling many typ es of instru ments to be
plugged straight in withou t D.I. boxes or external
preamplifiers.
Line in puts will be fo und usefu l as extra Effects Retu rns,
where ad ditional post-effect equalisation is requ ired.
4. IN SERT
The INSERT is a break point in the input chan n el signal path.
It allows the signal to be taken out of the mixer, through an
external piece of equipmen t and then ba ck into the mixer to
continue through to th e final outp u t. The Insert is a 3-pole 1⁄4"
‘A’ gauge Jack Socket, which is normally by-passed. When a
jack plug is inserted, the signal path is broken at a point just
after the Hi-Pass Filter, but before the EQ section. The signal
from the channel appears on the TIP of the plug and is
returned on the RING. The insert p oint allow s limiter s,
compressors and other signal processing units to be added as
requ ir e d to pa r t icu lar inp ut cha n nels an d becau se it is loca ted
PRE EQ, noise generated by t he externa l equipm ent m ay be
redu ced b y a sma ll amou nt of H .F. cut in the Equ aliser .
5. LIN E SELEC T
The LINE switch selects Line input w hen pressed, an d
Microphone input when released. When Line is selected the
Gain r ange i s redu ced b y 20dB (see 6 be low).
6. GAIN CONTROL
When t he Micro p hon e in p ut is se lected th is con tr ol act s as a
SENSITIV ITY control covering a 50dB range. Channel signal
level increases as the control is turn ed clockwise. When t he
Line inp ut is s elected it serv es as a GAIN control, with the
scaling reduced by -20dB from the printed scale. A nominal
0dB input signal will pass through at un ity gain, with the
knob set at the 20dB position. Some audio equipment,
particularly that in tended for dom estic use, operates at a
nomin al -10d BV level and an increa sed Gain settin g w ill be
required.
INPUT
Pag e 11