MOTU 4pre, Руководство пользователя

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1.
Th
ese jacks pr
ovide st
er
eo
, 24-bit S/PDIF digital input
and output a
t an
y sample r
at
e up t
o 96kHz.
2.
Th
ese t
w
o balanc
ed
, quar
te
r-inch jacks ser
ve as the
4pr
e’
s main outputs
. Y
ou can c
onnec
t them t
o a set of
po
w
er
ed studio monit
ors and then c
on
tr
ol the v
olume
fr
om the fr
on
t panel v
olume knob
. T
o hear disk tr
acks in
yo
ur audio soft
w
ar
e on these main outs
, assign the disk
tr
acks (and mast
er fader) t
o these main outs (
Main Out
1-2
).
Yo
u can also use the 4pr
e’
s on-boar
d C
ueMix
mixing t
o monit
or liv
e 4pr
e inputs her
e as w
ell.
3.
Th
ese XLR/TRS c
ombo jacks acc
ept either a mic cable or
a cable with a quar
te
r-inch plug
. U
se the fr
on
t panel mic
1-4 enc
oders t
o apply up t
o +60 dB or +22 dB of boost
,
re
spec
tiv
ely
, for the mic (XLR) or
TRS input
. T
o t
oggle the
-20 dB pad for the XLR (mic) input
, push the c
orr
espond-
ing fr
on
t-panel mic enc
oder
. T
o t
oggle 48V phan
to
m
po
w
er for the XLR (mic) input
, push and hold the c
orr
e-
sponding fr
on
t-panel enc
oder
. T
he
TRS jacks for inputs
3-4 ha
ve
higher impedanc
e for DI guitar c
onnec
tions.
4.
Th
e 4pr
e’
s analog line outputs oper
at
e as separ
at
e
outputs on balanc
ed +4dB
TRS (tip/ring/sleev
e)
quar
te
r-inch c
onnec
tors tha
t can also acc
ept an unbal-
anc
ed plug
. T
hey ar
e equipped with 24-bit
, 128x
ov
ersampling c
on
ver
te
rs.
5.
Co
nnec
t the 4pr
e t
o the c
omput
er her
e via either
Fi
re
W
ire
or USB2,
using either the standar
d 1394
Fi
re
W
ire
A or USB cable pr
ovided with y
our 4pr
e.
T
her
e’
s
not much diff
er
enc
e,
e
xc
ept tha
t F
ire
W
ire
offers bus-
po
w
er
ed oper
at
ion (without the DC po
w
er supply).
Impor
tant not
e:
it is best t
o turn off the 4pr
e when
plugging in the F
ir
eW
ir
e c
able
, as this a
voids the
possibility of sta
tic dischar
ge
, which c
an harm the
elec
tric
al componen
ts in the 4pr
e or y
our comput
er
.
6.
Th
is jack acc
epts an
y standar
d 9-18V DC po
w
er supply
with either tip-positiv
e or tip-nega
tiv
e polarit
y.
Quick Ref
e
re
nc
e:
4pr
e
Rear P
a
nel
3
4
6
5
1
2