SoundCraft Spirit Live 4 manual Line Input, Insert, Line Selec T, AIN C O Ntro L

IN PUT

3.

LINE INPUT

The LIN E Inp u t is a 3-p ole 1¤4"‘A’ gau ge jack socket, to accep t

balanced or u nbalanced line level sou rces w hen the LIN E

sw itch(5) is p ressed . Unlike the low im p ed ance Microp hone

inp u t,

this stage

p resents a high im p ed ance(>10kW) to the

inp u t

signal, enabling

m any typ es

of instru m ents to be

p lu gged

straight

in

w ithou t

D.I.

boxes

or

external

p ream p lifiers.

Line inp u ts

w ill

be

fou nd

u sefu l as extra Effects Retu rns,

w here ad d itional p ost-effect equ alisation is requ ired .

4.

INSERT

The IN SERT is a break p oint in the inp u t channel signal p ath .

It allow s the signal to be taken ou t of the m ixer, throu gh an

external p iece of equ ip m ent and then back into the m ixer to

continu e throu gh to the final ou tp u t. The Insert is a 3-p ole 1¤4"

‘A’ gau ge Jack Socket, w hich is norm ally by-p assed . When a

jack p lu g is inserted , the signal p ath is broken at a p oint ju st

after the H i-Pass Filter, bu t before the EQ section . The signal

from the channel appears on the TIP of the plug and is

returned

on

the

RIN G.

The insert

p oint allow s

lim iters,

com p ressors and other signal p rocessing u nits to be ad d ed as

requ ired to p articu lar inp u t channels and becau se it is located

PRE EQ, noise generated by the external equ ip m ent m ay be

red u ced by a sm all am ou nt of H .F. cu t in the Equ aliser.

5.

LINE SELEC T

The LIN E sw itch selects Line inp u t w hen p ressed , and

Microp hone inp u t w hen released . When Line is selected the

Gain range is red u ced by 20d B (see 6 below ).

6.

G AIN C O NTRO L

When the Microp hone inp u t is selected this control acts as a

SEN SITIVITY control covering a 50d B range. Channel signal

level increases as the control is tu rned clockw ise. When the

Line inp u t is selected it serves as a GAIN control, w ith the

scaling red u ced by -20d B from the p rinted scale. A nom inal

0d B inp u t signal

w ill p ass

throu gh at u nity

gain, w ith the

knob

set

at

the

20d B

p osition .

Som e

au d io equ ip m ent,

p articu larly

that

intend ed

for d om estic

u se,

op erates at a

nom inal -10d BV level and an increased Gain setting w ill be

requ ired .

Pa ge 11