Page 1
nd/ox
Agora
B
MKII
Af;ora B
Slim
Line
Operating
Instructions
Page 2
IMPORTANT
WARRANry
PACKING MATERIAL
Protect
your
speakers
from exposure to excessive
heat and
mois-
ture. Carefully
read Section
1
(setup)
before
you
installthe speak-
ers.
The
powered
speaker
should be connected
to the
(pre-)amplifier
before
it is connected
to the AC outlet.
It
is important
to follow
the instruction
in
Section
'11
(AC power
connection).
Please
note that
the warranty
is only valid
in
the
country
in which
the equipment
has
been
sold.
We also would
like to draw
your
attention
to the
fact that
the warranty becomes
null and
void
if
unauthorized
modifications
or unprofessional
repairs are
made.
Warranty
cards for equipment
sold
in
Swiüerland
or Austria
are
issued directly
by the authorized
dealer.
For equipment sold
in
France
you
will
find the
warranty
card
inside the
packing.
This
card must be
completed
and signed by
your
authorized
REVOX
dealer.
ln the Federal
Republic of Germanv,
in the USA,
and
in
most other countries
a special
warranty card supplied
with
the
equipment
This card
is
located
either
inside the
packing
or
in
a
plastic pouch
attached
to the outside of the
packing.
lf this card
is
missing
please
consult
your
REVOX dealer or
your
national
REVOX distributor.
Please
retain the original
box for reuse in case
your
equipment
ever
needs to be
transported
The
packing
material has been
especially
designed to
protect your
valuable equipment
from
shock
in
transit.
Vorsicht:
Das Gerät
ist in ausgeschaltetem
Zustand
(STANDBY)
nicht von der
Stromzuführung
getrennt
Attention: Cet
appareil n'est
pas
separe du
r6seau lorsqu'il est ddclench6
(STANDBY).
Warning: This unit
is not
separated
from the
mains supp
y
when swltched
o1f
(STANDBY).
Attenzione: Ouesto apparecchio
non ö separato dal
a rete
quando
interruttore
Ö spento
(STANDBY)
Precauciön: Este
aparato no estä separado
de la
red
cuando
estä apagado
(SfANDBY).
Waarschuwing: ln uitgeschakelde
toestand
(STANDBY)
s het apparaat
nlet
gesche
den van de
netspanning.
Advarsel:
Apparaten er ogsaa
hvis lukket
(STANDBY)
undet strom
Huomio:
Huo matta slltä, että
virta
on
katkaistu
laitteesta
(STANDBY).
sitä
ei
ole
eristetty sähköstä.
Forsildig: Selvom
strommen
ikke
er
pa
i apparatet
(SIANDBY).
sa
er
det
ikke
skilt
fra strom
Varning: Oaktat
om strömmen är avbruten
i apparaten
(STANDBY),
sa är den ända
kopplad med ström.
Page 3
Table of contents
sEcTtoN 1
Page
2
G enera L
Content
of
packing
3
3
3
AC
power
connection
Setup
sEcTroN
2
Synopt
cal sketch
Pilot lamps
Connection
to the
preamplif
er or amplifier
sEcTtoN 3
Connection versions
sEcTtoN
4
Technical data
sEcTroN 5
Block
diagram
Page 4
sEcroN
1
General
ln conventional
passive
speakers
the
frequency
range is allocated
to the
indivi-
dua
I
speaker
chässis by
passive
frlters implemented
with coils
and capacitors
The ohmic
resistance
inherent
to these coils
as well as
the resistance
of
the
connecting
cable
beh/,/een
the
amplifier and the speaker
have a detrimental
influence
ön the damptng
factol i. e.
it
becomes
much more
difflcult
for the
amplifier
to control
the speaker
diaphragm
movement.
ln
powered
speakersthe
frequency
spectrum
is split before
the.power
amplifi
erä.
ln this
case the
crossover
networks
can be
implemented
with
low loss
components
(amplifiers).
One
power
amplifier
each is assigned
to
the bass,
midänqe,
and treble.
These
power
amplifiers
are
installed in a speaker
hous-
lnq
(heäce
the
desiqnation
"powered").
This
arrangement
results
in short,
loürlloss
connectioni
bet,veen
the
power
amplifiers and
the corresponding
speaker
chassis.
The damplng
factor
is known and
controllable
Cone
type
speakers
generally have an asymmetrical
deflectlon
of
the dia-
phraqm.
thris
means that
the
travel of the
moving coil
is not identica
I in the
d i-
iectiön
toward
the maqnet
and
away from the
magnet. The
diaphragm
ofthe
bass soeakers oerform
the
qreatest
deflection.
This
is the
reason why
this
asvmmetrv
is
most
perceiväble
in
bass
speakers.
ln the
powered
speaker
AGORA
B MKll/AGORA
B SLIM
LINE, the only
feasible solution
to this
prob
lem has been
chosen,
the so-called
push-pull
operation
of a
pair
of identical
bass speakers
of which
one
is installed in the
housing in a conventional
man-
ner thö other,
however,
with
the magnet system
facing the
outside.
ln thisway
the
asymmetries
of the speakers
are mutually
compensated.
The diaphragm
movement
of the two
bass speakers
is rigidly
coupled to the
output signal
of
the bass
amplifier
by an
interlocking
control system.
Frequency
response
errors
and high-ordei
sympathetic
reaonance of the
housing,
which occur
in
passive
and
powered
systems
without interlocking
control, are
now a thing
of
the
past.
The
input sensitivity
of the
AGORA B lvKll/AGORA
B SLIM
LINE
powered
soeakärs can be
switch selected
so that
it can be matched
either to
a tuner/
preamplifier
combination
(e. g.
REVOX B286) or
a tuner/power
amplifier
c^om
bination
(e. g.
REVOX
8285). In
various
power
amplifiers
(e. g.
REVOX
8250)
and receiveis
it is
possible
to open
the
path
betu/een the
preamplifier
and the
oower
amolifier.
ln this case
the AGORA
B I\lKll/AGORA
B
SLIM
LINE
can be
bonnected
to the
preamplifier
output of the correspond
ing unit. Direct
connec-
tion
to source
units with
variable output
level
(e.9.
REVOX
CD 8226)
is also
feasible.
Thepowered
speakerAGORA
B MKll/AGORA
B
SLIM
LINE is. of course.
also
compatrble
with
REVOX equipment
of older series.
Your dealer
will
gladly
advise
you.
Protective
circuits
prevent
overheating of the
built-in
power
amplifiers
and
protect
the midrange
speaker
and the Nveeter
from overloads.
Page 5
Packing content
AC
power
connection
Setup
ln additron
to these operating
instructions
and a
power
cab e
with
a
plug
that
fits the AC outlets in
your
country, the
pack
ng contains a 12 m screened,
sing e conductor
cab e with cinch connectors on both ends. ln additron
there
is an adapter
for connectiof
to a
power
amp
ifier.
Before
you
connect the spea
kers to the AC outlet. make sure that the loca
I line
voltage ag
rees with the
specif
cation on the name
plate
on the
powered
spea
k
er box. Should
this not be the
case,
p
ease consu
t
your
dea er.
Do NOT connectthe
powered
speakerAGORA B N/Kll/AGORA
B
SLIN/
LLNE
to the AC
outlet until it has been
connected to the
preamp
ifier or the
power
amplifier
The
powered
speaker AGORA
B lVKll
/AGORA
B SLIN/ LINE is designed
as a
standing
box which means that t should be set up on the
floor. otherw se the
sound
impression
wil
suffer.
The cooling
f ns
on
the rear shou d be at least 5 cm
(2")
away
from any adja
cent surface
so that the
heat can be dissipated.
The
powered
speaker
AGORA B MKll/AGORA B SLIN/ L NE
has
an excep-
tiona
Lly large rad at on a ng e
which means
that
it ls not necessa ry to ti t it in the
d irection of the
lstener.
Basica lly, each spea
ker
should
be set up in
such
a way that it rad iates from the
acoustically
hard
(weakly
absorbing)
part
of the room to the acoustically soft
(strongly
absorbing)
part
of the room.
Strong
accentuation of treb
e and
bass
frequencies
at the
(pre
)
amp
ifier is not
recommended because
the distortion increases
and the
power
handling ca
pacrty
is strongly reduced
(in
some cases the
protect
ve circuit wrll
respond).
REVOX speakers
are
designed
with a neutral
sound and therefore
do not
require any corrections.
ö@
\*v [--h
q
L--ll
Page 6
sEcroN 2
Synoptical
sketch
wrth
quick-reference
description
of all functions
o
@
-"iJ"* o
11]
AC POWER
Power inlet
f2l
PowER oN/oFF
MODE 4
Position rotary switch:
ON:
Unit
is switched on
(standby)
as long as
it is connected to
the AC
power
source.
AUTO: The
unlt automatica
ly starts up from STAN DBY
when an input signal
is
availabie.
lf
there
is no
input
signal
for approx. 5 minutes.
the unit
switches
automatical
y
to STANDBY
DC: Swltch
on at
>
I
V DC. switch ofl at
<
5
V DC.
Pin
assignment:
ground
[ ]
to
pin
6
0...30V
DC to
pin
B
At thE REN/]OTE
CONTROL INPUT/OUTPUT
SOCKCt.
lR: Automatic
on/off
in conjunction wlth the
8209
subcontroLler.
13]
INPUT SELECTOR
4-Posltion
rotary
switch:
PRE AIVP
R:
Operation
as
connected
to
PWR-AMP
R: Operation
as
connected
to
PWR-AIVP
L:
Operation
as
connected
to
PRE-AMP
L:
Operation
as
connected to
riqht hand box,
preampLifier
output
right hand box,
amplifier output
left
hand
box.
power
amfrlifier output
left hand box.
power
amplifier output
[4]
REN/OTE CONTROL
lN PUT:
Connection of
the B2O9 subcontroller
or input
f rom 1st AGO RA
Box
with serially
connected
wiring
OUTPUT:
Connecting
to the
next AGORA
with
serlally
connected
wiring
(to
REN/OTE
INPUT socket)
l5l
rNPUT R/L
CINCH terminals
for audio
input signals.
Page 7
Pilot lamps
(LEDs)
Gonnection to the
pre-
amplifier
or
power
amplifier
The tv/o LEDS are located on the acoustic
baffle on the right-hand
side of
the
f,r',/eeter. They are also visible
when
the front
cover is installed.
The red LED is alightwhen the
powered
speaker
is
connected to the AC
power
outlet and
if
switch
l2l
is in one
of the following
positions:
AUTO: The speaker is switched to STANDBY
by the automatic on/off crrcuit.
DC: The
speaker
is
switched
off
((5VDC).
(lf
this external voltage version rs not
used, the
DC
setting
functlons in
the same
way
as
"OFF"
(STANDBY).
lR: The speaker is in STANDBY mode and
operates
in
conjunction
with
the
8209
subcontrol
er
(connection
versron ll).
The
green
LFD is alight in
normal
operatlon if switch
l2l
is in
one of
the follow-
ing
positions:
ON:
The speaker is continuously switched
on.
AUTO:
The
speaker
is
switched on by the automatic on/off circuit.
DC: The speaker is switched on by an external DC voitage
()9VDC).
lR: The speaker is
switched
on ln conlunction
with the 8209 subcontroller
{connection
version Jl).
The
red
and the
green
LED are alight
simuitaneously rf the built- n
protective
circuit has responded
either because of overheating
or because the mid range
speaker or the t\,veeter is overloaded. In
the f irst case the
power
amplifiers are
muted
until their temperature
has
dropped
to an admissible level; in the se-
cond case the muting is cancelled
after a few
seconds.
Before the
powered
speaker AGORA
B N/Kll/AGORA
B SLIM LINE can be
connected, it
s
necessa ry
to
match
the input
sensitivity to the d riving
amplif
ier.
-
lf a
power
am
plifier
or a receiver is
used
(e.
g.
REVOX B2B5),
switch
[3]
must
be
in
the
PWR
AMP
positlon.
lf a
preamplifier
or a
preceiver
is
used
(e. g.
REVOX 8286).
switch
l3l
must
be
in the PRE
AMP
position.
1f a
power
am
plif
ier
or a
recelver is
used in which
the signal
path
beh/,/een the
preamplifier
and the output stage
can be opened
(e.
g.
REVOX 8250), it is
better to connect the
powered
speal,er to
the
preamplifier
output.
(Switch
[3]
in PRE
AMP
position).
A
connectlng cable
(single-conductor,
screened,
CINCH connectors
on both
ends) is bypacked to the
powered
speaker
AGORA B lVKll/AGORA B
SLINI
LINE. lf required
by the room size,
this cable can
be extended up
to 35
m
(120feet)
without
adversely aflecting
the
quality
of the sound reproduction.
lf the
speaker
is
to be connected to a
preamplifier
equipped
with DlN. XLR or
other output
sockets,
p
ease contact
your
dea er or consult
the operating rn-
structions of
your preamplifier.
Your
dealer normally
carries sultable adapters
in
stock.
The
bypacked adapter cable shou
d be used for
connecting the
speaker to a
power
amplifier.
Page 8
sEcTroN 3
Connection
versions
Version I
AGORA B N/K II
(LEil)
ln the following Chapter
the term
"amplifier"
s used
to mean
power
amplifier,
preamplifiel
or
preceiver.
Basically, there
are trr'r'o methods for connecting the REVOX AGORA
B
lVKll/
AGORA
B SLINl LINE speaker
to an amplrfier.
AGORA B N/K II
(RtcHT)
The left hand amplifier
output is connected
by a single-cond
uctor. screened
cable to
the input socket INPUT L of the left-hand
powered
box. The INPUT
SELECTOR
l3l
switch of the
lefr-hand
box
mustbe
setto eitherthe
PRE AMP L
(preamplifier)
or the PWR AMP L
(power
amplifier)
position.
The
right-hand channel is cabled analogously. The INPUT
SELECTOR
l3l
switch of the
right hand
box
must be
set to either the
PRE
AM
P R
(preamplifier)
or the
PWR AMP R
(power
amplifier)
position.
8250
Page 9
Version ll
AGORA B N/ Kll
/AGORA
B SLIM LINE in
the a
nciila ry
room with 8209 subcon-
troller.
AGORA B MK I]
AGORA B IVK II
The REVOX B209
subcontroller
is
a
high
qua
lity
preamplifier
without
operator
controls. ltis nsta lled below the AGO RA in
place
of the base. The volume, the
balance
and the
tone
contro are
adjusted with the B20B lR remote
control.
The B209 subcontroller features an inputthat is
supplied with audio signals by
a
preamplifrer
located in
lhe
nain room.
Detailed information concerning the
REVOX 8209
subcontroller and the ex-
tended application facilities
of the AGORA in conjunction
with the B209 sub
controller can be found in the 8209
operating instructions.
8209
Page 10
sEcTtoN 4
Technical data
AGORA B MKII
Audio data
Bandwidth
(D
N 45500)
24Hz 42kHz
Frequency response
(-
3 dB)
4AHz.22kHz
Harmonic distortion Ktot Bandw
dih
at a
d stance of 1ra:
45Hz 2OkHz
wth sound
pressure
evel82dB
SPLmax 0 5%
w th sound
pressure
evel88dBSPLmax.
1.0%
Achievable
sound
pressure
level
100
m3 living room, mean reverberat
on
rr-r.0r
dr.d
.ol2r
)d.
'r
p
p6dto-.
s mu taneoLrsly
in
operation:
I]3
dB SPL
Speaker configuration
M drange speaker
d a.r,.2x220nn
d am 122nn
diam
25 mm
Flux densitiy
2\11I
117
1.1r
Mldrange
speaker
Magnetic Ilux
Midrange speaker
2x541rrwb
539!Wb
412pWb
Electrical data
-&\
*l
lnputs Sens
tiv ty for 100 dB SPL at a d stance
of 1 m:
sw tch
in
PRE-Al\/lP
pos.
0 35v/47
kohrn
Swtch
in PWF AN,4P
pos
3.5V/l
kohm
Operating modes ON: continuous ON
AUTO on/olfvaaudio
DC: on/off v a DC vo tage
F:
on/offva8209
AGORA B SLIM LINE
Switch-ofi delay of the
automatic on/off circuit approx 5
m n
Sensitivity
ol the
automatic on/off circuit
-
PRE-AN/P
0.25 mV
2.5 mV
DC switching thresholds Onr
>9V
off:<5V
General data
Power requirements 22A/11AV
+10a/a
interna
y
so der strappab
e
50
60Hz
220V:
1
10V:
T16A slow
T315A slow
Power consümption
Standby
mode
-
Max.
(100
dB SPL at 1 m)
<7W
400w
Operating environment
-
Amb enl temperature
Re atve humld ty
{D
N 40040)
+10 + 400c
CassF
Weiqht 38.5 kg
(AGORA
B N4Kl
)
43 5kg
{AGORA
B SL M L NE)
Housing ve.sions Wa nut dark, Ash black,
Pläno varnish b ack or whii-"
Dimensions
(WxHxD)
790x386x435mm AGoRA B MKI
1000x334x395mm AGORA B Sl M LNE
Sublect to change
8
Page 11
sEcTroN 5
Block
diagram
V-,
I
v ,
I
Page 12
sruDElr
nd/ox
Manufacturer
Willi
Studer
AC
CH-8105
Regensdorf/Switzerland
Althardstrasse
30
Studer
Revox GmbH
D-7827
Lölängen/Gennany
Thlstrasse 7
Worldwide
Distribution
Revox Ela
AG
CH-8105
Regensdorf/Switzerland
Althardstrasse 146
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