6b/9b amplifier bridged mode hook up, 11 9b, Five channel power amplifier – Bryston 9BSST User Manual
Page 13: Heat, Bridging kits

BA
LA
N
C
ED
IN
PU
T
4v
1v 2v
OU
TP
UT
25
0W
/8
X
LR
/P
H
O
N
E
IN
PU
T
Pin
1
/S
LE
EV
E:
Pin
2
/T
IP
:
Pin
3
/R
IN
G
:
G
N
D
PO
S(+
)
N
E
G
(–
)
WARNING!
RISK OF HAZARDOUS ENERGY
. MAKE PROPER SPEAKER CONNECTIONS.
SEE OPERATING MANUAL BEFORE USING.
HO
M
E T
HE
AT
RE
S
ET
TIN
GS
B
AL
AN
C
ED
IN
PU
T:
SIN
G
LE
E
N
D
ED
IN
PU
T:
See
m
an
ual
fo
rfu
rt
her
d
et
ai
ls
.
2V
1V
S
EN
SIT
IV
IT
Y
fo
r1
00
W
@
8
PO
LA
R
IT
Y
18
0
SIN
G
LE
E
N
D
ED
IN
PU
T
6B/9B AMPLIFIER BRIDGED MODE HOOK
UP
6B+9B-BRIDGED-HOOKUP(RP8)PMC.cdr WRP 1 NOV 2002
PU
SH
0
BA
LA
N
C
ED
IN
PU
T
4v
1v 2v
OU
TP
UT
25
0W
/8
X
LR
/P
H
O
N
E
IN
PU
T
Pin
1
/S
LE
EV
E:
Pin
2
/T
IP
:
Pin
3
/R
IN
G
:
G
N
D
PO
S(+
)
N
E
G
(–
)
WARNING!
RISK OF HAZARDOUS ENERGY
. MAKE PROPER SPEAKER CONNECTIONS.
SEE OPERATING MANUAL BEFORE USING.
HO
M
E T
HE
AT
RE
S
ET
TIN
GS
B
AL
AN
C
ED
IN
PU
T:
SIN
G
LE
E
N
D
ED
IN
PU
T:
See
m
an
ual
fo
rfu
rt
her
d
et
ai
ls
.
2V
1V
S
EN
SIT
IV
IT
Y
fo
r1
00
W
@
8
PO
LA
R
IT
Y
18
0
SIN
G
LE
E
N
D
ED
IN
PU
T
PU
SH
0
The
same
signal
is
fed 
into 
both
amplifier
channel
inputs
via 
a 
“Y”
adaptor
cable.
Note
that
the 
POLARITY 
of
one
channel
is
the
inverse
of 
the 
other.
THIS
IS 
ESSENTIAL 
for 
the 
amplifier
to 
operate 
in
bridged
mode.
Fa
ilu
re
to
IN
V
ER
T o
n
e o
f t
he
c
h
an
n
els
re
la
tiv
e t
o t
h
e o
th
er
w
ill
re
sul
t i
n
z
er
o o
u
tp
u
t.
It
d
oe
s n
ot
m
at
te
r
which
channel
is
set 
to 
zero 
degrees
and
which
one
is
set 
to 
180 
degrees,
however,
as 
long 
as 
they 
are
different.
When
bridging
two
channels
together
the
resultant
output
will
be 
increased 
by 
6 
dB 
relative 
to 
the 
output
of 
a 
single
channel.
To 
keep 
the
gain
of 
a 
bridged
channel
the
same
as 
that 
of 
a 
single
channel,
the
SENSITIVITY
switch
should
be 
set 
to 
a
higher
voltage
setting.
For 
example, 
if
a
single
channel
is
set 
to 
“1V”
sensitivity,
then
both
the 
bridged 
channels
would
be 
set 
to 
“2V”.
Likewise,
if
a
single
channel
were
set 
to 
a
sensitivity
of
“2V”,
then
the 
bridged 
channels
would
be 
set 
to 
“4V”.
While
any
two
channels
can
be 
bridged, 
we 
recommend 
that
adjacent
channels
be 
used 
(as 
shown) 
to
facilitate
the 
external 
wiring
between
the 
channels.
Note
that
only
the 
POSITIVE 
(+)
terminals
on 
the 
6B 
power 
amplifier
modules
are
connected
to 
the 
speaker.
A 
ground 
wire
(16g
or 
heavier 
wire
recommended)
must
be 
connected 
between
the
two
BLACK
output
terminals
on 
the 
6B 
amplifier 
channels
being
bridged.
 DO 
NOT 
CONNECT
ANYTHING
ELSE
TO 
EITHER 
OF 
THESE 
BLACK
OUTPUT
TERMINALS!
The
red 
(positive) 
output
terminal
of
the 
non-inverted 
channel
(the
one
whose
polarity
is 
set 
to 
zero 
degrees)
is 
connected 
to 
the 
speakers
positive
(+)
terminal.
The
red
(positive)
output
terminal
of 
the 
inverted
channel
(the
one
whose
polarity
is
set 
to 
180
degrees)
is
connected
to
the 
speakers 
negative
(-)
terminal.
To SOURCE SIGNAL
BA
LA
N
C
ED
IN
PU
T
4v
1v 2v
OU
TP
UT
25
0W
/8
X
LR
/P
H
O
N
E
IN
PU
T
Pin
1
/S
LE
EV
E:
Pin
2
/T
IP
:
Pin
3
/R
IN
G
:
G
N
D
PO
S(+
)
N
E
G
(–
)
WARNING!
RISK OF HAZARDOUS ENERGY
. MAKE PROPER SPEAKER CONNECTIONS.
SEE OPERATING MANUAL BEFORE USING.
HO
M
E T
HE
AT
RE
S
ET
TIN
GS
B
AL
AN
C
ED
IN
PU
T:
SIN
G
LE
E
N
D
ED
IN
PU
T:
See
m
an
ual
fo
rfu
rt
her
d
et
ai
ls
.
2V
1V
S
EN
SIT
IV
IT
Y
fo
r1
00
W
@
8
PO
LA
R
IT
Y
18
0
SIN
G
LE
E
N
D
ED
IN
PU
T
PU
SH
0
BA
LA
N
C
ED
IN
PU
T
4v
1v 2v
OU
TP
UT
25
0W
/8
X
LR
/P
H
O
N
E
IN
PU
T
Pin
1
/S
LE
EV
E:
Pin
2
/T
IP
:
Pin
3
/R
IN
G
:
G
N
D
PO
S(+
)
N
E
G
(–
)
WARNING!
RISK OF HAZARDOUS ENERGY
. MAKE PROPER SPEAKER CONNECTIONS.
SEE OPERATING MANUAL BEFORE USING.
HO
M
E T
HE
AT
RE
S
ET
TIN
GS
B
AL
AN
C
ED
IN
PU
T:
SIN
G
LE
E
N
D
ED
IN
PU
T:
See
m
an
ual
fo
rfu
rt
her
d
et
ai
ls
.
2V
1V
S
EN
SIT
IV
IT
Y
fo
r1
00
W
@
8
PO
LA
R
IT
Y
18
0
SIN
G
LE
E
N
D
ED
IN
PU
T
PU
SH
0
To
SOURCE
SIGNAL
While
single
ended
or 
unbalanced 
inputs
are
used
here,
bridging
can
also
be 
accomplished 
using
the
balanced
inputs
as 
shown 
to
the 
left.
When
bridging
“PRO”
channels
which
are
eq
uip
pe
d
w
ith
le
ve
l
co
nt
ro
ls
,
it
is
imperative
that
the 
level 
controls
on 
BOTH 
channels
being
bridged
be 
set 
to 
their 
maximum
clock-wise
positions
(0
dB).
While
balanced
inputs
are
used
h
er
e,
b
rid
g
in
g
ca
n
a
ls
o
b
e
accomplished
using
the
single
ended
inputs
as 
shown 
at
right.
HEAT
When
two
6B 
channels 
are 
bridged 
the
power
output
can
exceed
800
Watts.
Two
9B 
channels 
can
provide
over
300
W
a
tt
s.
W
h
e
n
o
p
e
ra
te
d
a
t
th
e
se
elevated
power
levels
there
is 
a 
p
o
s
s
ib
il
it
y
o
f
th
e
a
m
p
li
fi
e
r
overheating.
When
overheated
they
will
automatically
be
shutdown
by
internal
protection
circuitry
to
prevent
a
n
y
d
a
m
a
g
e
o
cc
u
rr
in
g
to
th
e
amplifier.
To 
prevent 
overheating
it
may
be 
necessary 
to 
provide 
external
fan
cooling
especially
if
the
amplifier
is
installed
in
an 
enclosed 
cabinet
and
operated
at 
or 
near 
maximum
power
levels.
BRIDGING KITS
Bryston
can
supply
Bridging
Kits
consisting
of 
a 
“Y”
adaptor
cable
and
a
ground
strap
cable.
The
“Y”
adaptor
cable
can
be 
equipped 
with
either
RCA
(Phono)
connectors
(Part
#
150901)
for
single-ended
a
p
p
li
c
a
ti
o
n
s
,
o
r
w
it
h
X
L
R
co
n
n
ec
to
rs
(P
ar
t
#
1
5
0
9
0
2
)
fo
r
balanced
applications.
The
ground
strap
cable
is 
equipped 
with
gold
plated
spade
lug
connectors
on
either
end.
Bryston
Bridging
Kits
are
designed
for 
use 
with
adjacent
channels.
AL
THOUGH 6B CHANNELS ARE SHOWN, THE
SAME HOOKUP APPLIES TO 9B CHANNELS
11
9B
SST
FIVE CHANNEL POWER AMPLIFIER
