Revox B251 User Manual

1
SIART-UP
PROCEDURE
1.1 General
1.1.1
Gonnecting
the audio sources
Audio sources
are devices such
as turntables,
tuners,
and tape
recorders that supply
audio
signals.
Tape
recorders can both transmit
and
receive
(record)
signals
whrch
means thatthe
audio
path
must be connected
in
both
direc-
tions.
Turntable:
-
Connect
cable
(Cinch
connector)
of
the
turntable to the
PHONO input. lf the
turn-
table is equipped
with
a
moving
magnet
cartridge, the
input MM
156l
is used.
Turn-
tables
with moving coil cartridges are
con-
nected to the
input
MC
[57]
(retrofittable
option.
part
No. 78670).
-
Connect
the
skinned
end
of
the thin
ground
wire
to the screw-type
terminal
[60]
(loosen
hexagon nut,
slide
stranded wire under
it
and retighten nut).
t57I
[56]
Compact
Disc digital audio
player (cable
C2C
210)
-
The
socket
for connecting a CD
digital
au-
dio
player
is labeled
with
DISC
[51].
Tuner
(cable
C2C
210)
-
Connecttuner
output
lfor8261:
FIXED OUT-
PUT)
to
the amplifier
input TUNER
1501.
A
second
tuner
(e.9.
AM receiver) can be
connected
to the AUX
input
t551.
Reel-to+eel
and cassette record ers
(2x
cables
c2c
2101
-
Connect
recorder
output
(OUTPUT)
to am-
plifier
inputTAPE
1 lN
1491.
-
Connect
recorder input
(INPUT)
to amplifier
output
TAPE 1
OUT
i491.
-
A
second
reel-to-reel
or
cassette
recorder
can be
connected to the
input and output
TAPE
2l4gl.
AUXiliary:
-
The AUX
input is
available
for connecting
additional
audio sources.
The following
can,
e.g. be connected:
third
recorder
(reproduce
only), second
tuner,
audio
signal of
TV
set,
etc.
MONITOR:
-
An equalizer can be
looped in
between
the
terminals
MONITOR lN
[53]
and OUT
[54]
after the connection between
preamplifier
and the
power
stage
has
been separated.
This can done by
pressing
the switch SEPA-
RATED
l52l
with the aid
of
a thin
pin
that
is
inserted through the hole in the
rear wall.
Note: the
white
socket always
identifies the
left-hand
channel.
the
red
socket the
right-
hand channel.
1.1.2 Connecting
the speakers
To
pairs
of speakers can be
connected.
The
speakers
that are used
more frequently
should be connected to the terminals
SPEAK-
ERS A
[58],
the
second
pair
to the
terminals
SPEAKERS
B
l59l
Ensure that speakers
are connected
in correct
phase
relationship.
The
black
terminal on
the
speaker
box
must
be
connected
to the black
(ground)
terminal of the amplifier
the
red
speaker
terminal to the
red
(hot)
terminal
of
the
amplifier.
To
prevent
undesirable speaker

Revox B251 Specifications

General

Type	Integrated Amplifier
Frequency Response	20Hz to 20kHz
Weight	12kg
Output	Pre out
Speaker Load Impedance	4Ω - 8Ω
Input Impedance	47kΩ