Behringer EURORACK PRO RX1602 User manual

Version 1.3 November 2003
Users Manual
ENGLISH
EURORACK PRO RX1602

2
EURORACK PRO RX1602
This symbol, wherever it appears, alerts you to the
presence of uninsulated dangerous voltage inside
the enclosurevoltage that may be sufficient to
constitute a risk of shock.
This symbol, wherever it appears, alerts you to
important operating and maintenance instructions
in the accompanying literature. Please read the
manual.
IMPORTANT SAFETY INSTRUCTIONS
CAUTION: To reduce the risk of electric shock, do not remove
the top cover (or the rear section). No user
serviceable parts inside refer servicing to qualified
personnel.
WARNING: To reduce the risk of fire or electric shock, do not
expose this appliance to rain and moisture.
DETAILED SAFETY INSTRUCTIONS:
1) Read these instructi ns.
2) Keep these instructi ns.
3) Heed all warnings.
4) F ll w all instructi ns.
5) D n t use this device near water.
6) Clean nly with a dry cl th.
7) D n t bl ck any ventilati n penings. Install in
acc rdance with the manufacturers instructi ns.
8) D n t install near any heat s urces such as radiat rs,
heat registers, st ves, r ther apparatus (including
amplifiers) that pr duce heat.
9) D n t defeat the safety purp se f the p larized r
gr unding-type plug. A p larized plug has tw blades
with ne wider than the ther. A gr unding type plug
has tw blades and a third gr unding pr ng. The wide
blade r the third pr ng are pr vided f r y ur safety. If
the pr vided plug d es n t fit int y ur utlet, c nsult
an electrician f r replacement f the bs lete utlet.
10) Pr tect the p wer c rd fr m being walked n r
pinched particularly at plugs, extensi n c rds, and the
p int at which they exit the unit.
11) Only use attachments/access ries specified by the
manufacturer.
12) Use nly with the cart, stand, trip d, bracket, r table
specified by the manufacturer, r s ld with the device.
When a cart is used, use cauti n when m ving the cart/
device c mbinati n t av id injury fr m stumbling ver
it.
13) Unplug this device during lightning st rms r when
n t used f r l ng peri ds f time.
14) Refer all servicing t qualified service pers nnel.
Servicing is required when the unit has been damaged
in any way, such as p wer supply c rd r plug is
damaged, liquid has been spilled r bjects have fallen
int the device, the unit has been exp sed t rain r
m isture, d es n t perate n rmally, r has been
dr pped.

3
EURORACK PRO RX1602
RX1602
EURORACK PRO
Professional multi-purpose 16-input ultra low-noise line mixer
sExtremely flexible keyboard and multi-purpose sub-mixer, multi-track monitorin mixer, level translator,
FX return sub-mixer etc.
s16 balanced hi h-headroom line inputs for individual stereo or mono use of each section
sUltra low-noise ULN desi n, hi hest possible headroom, ultra-transparent audio
sDedicated balance and level controls plus +4/-10 level selection per channel
sMonitor/FX send control per section with lobal master send control for flexible monitorin , recordin or
effects applications
sIlluminated double-function mute button per section with additional clip indication provides comfortable
input source/level information
sMonitor/FX si nal assi nable to phones output for added flexibility
sHi hly accurate 2 x 7-di it LED level meters and individual level control for left and ri ht main mix si nal
s1/4" TRS main mix outputs plus easily accessible headphones output on the front panel with dedicated
level control
sHi h-quality detented ALPS® rotary controls for lon -term reliability
sShielded toroidal power transformer for lowest noise interference
sExtremely ru ed construction ensures lon life even under the most demandin conditions
sManufactured under ISO9000 certified mana ement system

4
EURORACK PRO RX1602
TABLE OF CONTENTS
1. INTRODUCTION ......................................................... 4
1.1 Before you get started ................................................... 5
1.1.1 Shipment ............................................................... 5
1.1.2 Initial operation ...................................................... 5
1.1.3 Warranty .............................................................. 5
1.2 The users manual .......................................................... 5
2. CONTROL ELEMENTS AND CONNECTIONS ............. 5
2.1 Channel section .............................................................. 5
2.2 Main section .................................................................... 6
2.3 Mains connection ........................................................... 6
3. APPLICATIONS .......................................................... 7
3.1 Keyboards sub-mixer ..................................................... 7
3.2 Sub-mix with samplers ................................................... 7
3.3 Monitoring multi-track recorders .................................... 8
3.4 Small live setup ............................................................... 8
4. INSTALLATION ........................................................... 8
4.1 Rack mounting ................................................................ 8
4.2 Audio connections ......................................................... 9
5. AUX CHANNEL MODIFICATION .................................. 9
6. SPECIFICATIONS ..................................................... 10
7. WARRANTY .............................................................. 11
1. INTRODUCTION
Congratulations! With the EURORACK PRO RX1602, you have
purchased a multifarious problem-solver for signal distribution.
This piece of equipment was developed for those among you
with the highest expectations, who are in the business of
professional recording, radio and TV broadcast studios, PA and
home recording situations, etc. The RX1602s extensive range
of possibilities make it ideal for routing separate signals to a
single stereo output (mixer), or for signal level adjustment of
individual signals (level translator)all these functions can be
achieved by using the EURORACK PRO RX1602.
Future- riented BEHRINGER techn l gy
Our rack mixers technology is based on experience and
insights spanning many years, delving into the fields of audio
technology already used worldwide in countless studios as well
as radio and TV applications.
To allow for the highest possible level of operational safety,
we manufacture our equipment under the highest quality
standards in the industry. Your RX1602 has been manufactured
under ISO9000 certified management system.
Balanced inputs
The BEHRINGER RX1602 features electronically servo-
balanced inputs. The automatic servo function detects when
unbalanced jacks are connected, and internally adjusts the signal
level so that no level difference between input and output signals
occurs (6 dB correction).
+The f ll wing users manual is intended t
familiarize y u with the units c ntr l elements,
s that y u can master all the functi ns. After having
th r ughly read the users manual, st re it at a safe
place f r future reference.
FOREWORD
Dear Customer,
welcome to the team of
BEHRINGER users, and
thank you very much for
expressing your confi-
dence in us by pur-
chasing the RX1602.
Writing this foreword
for you gives me great
pleasure, because it
represents the cul-
mination of many
months of hard work
delivered by our
engineering team to
achieve a very ambitious
goal: to develop a robust
rack mixer with
outstanding sound
quality, all utilitzing the
smallest amount of space possible. The task of designing our
new RX1602 certainly meant a great deal of responsibility, which
we assumed by focusing on you, the discerning user and musician.
Meeting your expectations also meant a lot of work and night
shifts. But it was fun, too. Developing a product usually brings a
lot of people together, and what a great feeling it is when all who
participated in such a project can be proud of what theyve
achieved.
It is our philosophy to share our enjoyment with you, because
you are the most important member of the BEHRINGER team.
With your highly competent suggestions for new products youve
made a significant contribution to shaping our company and
making it successful. In return, we guarantee you uncompromising
quality as well as excellent technical and audio properties at an
extremely reasonable price. All of this will enable you to give free
rein to your creativity without being hampered by budget
constraints.
We are often asked how we manage to produce such high-
quality devices at such unbelievably low prices. The answer is
quite simple: its you, our customers! Many satisfied customers
mean large sales volumes enabling us to get better purchasing
terms for components, etc. Isnt it only fair to pass this benefit on
to you? Because we know that your success is our success too!
I would like to thank all of you who have made the RX1602
possible. You have all made your own personal contributions,
from the developers to the many other employees at this company,
and to you, the BEHRINGER user.
My friends, its been worth the effort!
Thank you very much,
Uli Behringer
1. INTRODUCTION

5
EURORACK PRO RX1602
1.1 Before you get started
1.1.1 S ipment
The RX1602 was carefully packed at the factory to assure
secure transport. Should the condition of the cardboard box
suggest that damage may have taken place, please inspect the
unit immediately and look for physical indications of damage.
+Damaged units sh uld NEVER be sent directly t us.
Please inf rm the dealer fr m wh m y u acquired
the unit immediately as well as the transp rtati n
c mpany fr m which y u t k delivery f the unit.
Otherwise, all claims f r replacement/repair may
be rendered invalid.
1.1.2 Initial operation
Please make sure the unit is provided with sufficient ventilation,
and never place the EURORACK on top of an amplifier or in the
vicinity of a heater to avoid the risk of overheating.
+Bef re plugging the unit int a p wer s cket, please
make sure y u have selected the c rrect v ltage:
The fuse compartment near the power plug socket contains
three triangular markings. Two of these triangles are opposite
one another. The voltage indicated adjacent to these markings is
the voltage to which your unit has been set up, and can be
altered by rotating the fuse compartment by 180°. ATTENTION:
This d es n t apply t exp rt m dels that were f r
example manufactured nly f r use with 120 V!
+If y u alter the units v ltage, y u must change the
fuse acc rdingly. The c rrect value f the fuse
needed can be f und in the chapter
SPECIFICATIONS.
+Faulty fuses must be replaced with fuses f
appr priate rating with ut excepti n! The c rrect
value f the fuses needed can be f und in the
chapter SPECIFICATIONS.
Power is delivered via the cable enclosed with the unit. All
requiered safety precautions have been adhered to.
+Please make sure that the unit is gr unded at all
times. F r y ur wn pr tecti n, y u sh uld never
tamper with the gr unding f the cable r the unit
itself.
1.1.3 Warranty
Please take a few minutes and send us the completely filled
out warranty card within 14 days of the date of purchase. You
may also register online at www.behringer.com. The serial number
needed for the registration is located at the top of the unit. Failure
to register your product may void future warranty claims.
1.2 The users manual
The users manual is designed to give you both an overview of
the control elements, as well as detailed information on how to
use them. In order to help you understand the links between the
controls, we have arranged them in groups according to their
function. If you need to know more about specific issues, please
visit our website at www.behringer.com, where youll find
additional information on mixing consoles, effects units and
dynamic processors.
2. CONTROL ELEMENTS AND
CONNECTIONS
In this chapter we go about describing all control elements of
your EURORACK PRO RX1602. All controls and connectors will
be explained in full detail. You will also receive useful information
about possible applications.
2.1 Channel section
Fig. 2.1: Control elements of the channel section
Use the MON/FX control to set the signal level of the
respective channel for monitoring or effects purposes.
You can take the MON/FX signal at the MON OUT SEND
connector . The MON/FX SEND control of the main
section governs the overall MON/FX SEND signal level.
This aux send path is factory set to pre fader and post
mute. It means that the respective channels monitor signal
or effects send signal is still present at the MON OUT SEND-
connector when the LEVEL control is turned to its left-
most position. If the MUTE switch is in its depressed
position, the signal is muted totally. The LEVEL control is
equivalent to channel faders on conventional mixing
consoles.
+Y u have the pti n t retr actively make the m nit r
channel perf rm dependently fr m the setting f the
LEVEL c ntr l (p st fader). This m dificati n can
be d ne individually f r each channel.
This modification makes sense when you for example wish
to frequently use certain channels for effect applications.
How necessary actions are taken is explained in ch. 5:
AUX CHANNELS MODIFICATION.
By using the BALANCE control, you can
- set up the position of mono signals in the stereo image,
and
- regulate the ratio of left/right channel signals when
processing stereo signals.
The MU E switch is used to interrupt the signal path, thus
muting the respective channel. When pressed (signal muted)
the switch is lit red.
When the MUTE switch is not depressed, the red light
functions as CLIP display, indicating when the input signal
level is too high (>+17 dBu). To avoid distortion, please
reduce the signal level using the LEVEL control in
case the CLIP indicator is frequently or permanently lit.
To increase or reduce the input signal level, use the LEVEL
control (increase up to +15 dB, reduce all the way down
to -oo).
Similarly, use the LEVEL controls of the channel sections
to regulate the channels signal level present in the main
mix.
2. CONTROL ELEMENTS AND CONNECTIONS

6
EURORACK PRO RX1602
Use the OPERA ING LEVEL switch located on the rear of
your RX1602 to individually adjust each channel to the
output signal level of your equipment. When the switch is
depressed (-10 dBV), the inputs are more sensitive.
These are the inputs of the channel sections on balanced
1/4" TRS connectors. Of course, you can connect mono
jacks (unbalanced operation). To use a channel for a mono
signal, please connect the signal source to the left input.
2.2 Main section
Fig. 2.2: Main section
Use the MON/FX SEND control to set the signal level of
those signals that are routed to the MON OUT SEND
connector for monitoring or effects applications.
The left signal portion of the mix created using the LEVEL
and BALANCE controls of each channel is set using the
MAIN LEF control.
The right signal portion of the mix is correspondingly
adjusted using the MAIN RIGH control. Amplification of
up to +15 dB is possible on both controls.
You can easily get a readout of both channels by observing
the highly acurate 7-digit level meters labeled LEF OU PU
LEVEL and RIGH OU PU LEVEL.
GAIN SETTING:
To correctly set the input gain of a channel, please press the
MUTE switch of the remaining channels.
When recording with digital multi-channel recorders, the peak
meter on the recorder should not reach over 0 dB. This is because
unlike with digital recordings, even the smallest amount of
distortion can lead to unpleasant-sounding end result.
With analog recorders, the VU meters of the recording device
should read roughly up to +3 dB in case of low-frequency signals
(e.g. bass drum). Because of their inherent inertia, VU meters
tend to display levels of signals with frequencies of above 1kHz
too low. Therefore, when using instruments such as a hi-hat,
you should set the input gain only up to -10 dB. Snaredrums
should be set up to roughly 0 dB.
+The peak meters f y ur EURORACK PRO display
the level virtually frequency-independent. A re-
c rding level f 0 dB is rec mmended f r all kinds
f signals.
The O PHONES switch gives you the option to feed the
signals routed to the monitor/effects bus into your
headphones for control purposes.
ATTENTION
+We w uld like t bring y ur attenti n t the fact that
high v lume levels may damage y ur hearing and/
r y ur headph nes. Please turn the MAIN LEFT and
MAIN RIGHT c ntr ls as well as the PHONES c ntr l
in the main secti n all the way t the left bef re
p wering up the unit. Please always pay keen
attenti n t an appr priate v lume level.
The LEVEL control in the MAIN section governs the volume
level of your headphones.
Please connect your headphones to the PHONES connector.
It is a standard 1/4" TRS stereo connector.
Fig. 2.3: POWER switch, LEVEL control and
PHONES connector
Use the POWER switch to power up your RX1602. The
POWER switch should always be in the Off position when
you are about to connect your unit to the mains.
+Attenti n: The POWER switch d es n t fully
disc nnect the unit fr m the mains. Unplug the
p wer c rd c mpletely when the unit is n t used
f r pr l nged peri ds f time.
Fig. 2.4: MAIN OU and MON OU SEND connectors
The MAIN OU connectors come as 1/4" TRS jacks. The
main mix signal (derived from all channels) is present here.
You can set the output signal level by using the MAIN LEFT
and MAIN RIGHT controls (reducing all the way down
to -oo , increasing up to +15 dB). The main mix signal can be
used to feed your mixing console or stereo amplifier, among
others.
The monitor signal can be taken at the MON OU SEND
connector (1/4" TRS connector). It is just as well-suited for
being used with effects applications.
2.3 Mains connection
Fig. 2.5: Mains connector with
integrated fuse compartment
The mains connection is achieved via the standard IEC
connector. A matching power cord is included.
2. CONTROL ELEMENTS AND CONNECTIONS

7
EURORACK PRO RX1602
FUSE COMPAR MEN /VOL AGE SELEC ION: Before
plugging the unit into a power socket, please make sure
you have selected the correct voltage. Faulty fuses must
be replaced with fuses of appropriate rating without
exception. Some units feature a fuse compartment that
can be operated in two different positions, allowing
alternating between 230 V and 120 V. Attention: when
using the unit outside of Europe (running on 120 V), you
have to implement a fuse with a higher rating.
SERIAL NUMBER. The serial number is located on the top
of the unit. Please take a few minutes and send to us a
completely filled out warranty card within 14 days of the
original date of purchase. Otherwise, warranty claims may
be rendered invalid. Or fill out the warranty information
online at www.behringer.com.
3. APPLICATIONS
3.1 Keyboards sub-mixer
Very often, keyborards feature a stereo design, their signals
are already pre-amplified and require no sound processing. To
avoid using valuable channels of your main mixer for a purpose
other than processing mic signals, you can instead use your
RX1602 as a sub-mixer.
In this case, the output signals of keyboards, samplers or
similar sound sources are connected to the inputs of the
RX1602. You can route the MAIN OUTs of your RX1602 into your
main mixer via the aux returns or a stereo channel.
Fig. 3.1: Keyboard sub-mix using the RX1602
3.2 Sub-mix with samplers
Those of you who work with hardware samplers in studio
environments, and who combine many outputs of these units on
a single RX1602, can save yourselves a lot of frequent plugging
in and out of cables. At the same time, you get a practical way to
adjust the signal level to various recording equipment inputs.
Last but not least, you also get an extra effects bus.
Fig. 3.2: Sampler/PC application
3. APPLICATIONS

8
EURORACK PRO RX1602
3.3 Monitoring multi-track recorders
Professional sound cards and multi-track recorders can replay
several tracks simultaneously. For this purpose, your RX1602
can be ideally used as a space-saving monitor mixer.
Fig. 3.3: Monitoring multi-track recorders or multi-channel
sound cards
4. INSTALLATION
3.4 Small live setup
Compact and powerful, feature-rich equipment is optimal for
musicians who spend a lot of their time on the road. Fig. 3.4
shows an example of a compact solution for keyboard and vocal
amplification, whereby a singing guitar player or an additional
musician can easily be integrated into the mix.
Fig. 3.4: Expandable small live setup
4. INSTALLATION
4.1 Rack mounting
The BEHRINGER EURORACK PRO RX1602 requires one height
unit (1 HU) for being installed into a 19" rack. Please allow at
least an extra 4" of space for the connectors on the rear panel.
Also, please make sure that sufficient ventilation of the unit is
provided for, and never put the rack mixer onto an amp or similar
equipment to avoid overheating.
Please use M6 machine screws and nuts to install your RX1602
into a rack.

9
EURORACK PRO RX1602
4.2 Audio connections
You will require several types of cables for the various kinds
of connections possible. The following illustrations show you
how to wire different cables. Always use high-quality cables.
The audio inputs of the RX1602 are electronically balanced to
avoid hum problems.
Of course, you can also connect equipment featuring un-
balanced outputs. To this end, use either mono jacks or connect
ring and sleeve of the stereo jack (bridge pin 1 and pin 3 when
using XLR connectors).
Fig. 4.1: 1/4" S connector
Fig. 4.2: 1/4" RS connector
Fig. 4.3: 1/4" RS connector for headphones operation
5. AUX CHANNELS MODIFICATION
All monitor and effects signals are tapped into post mute and
pre fader, which resembles the function of a pre fader aux
channel on conventional mixing consoles. If you prefer to use
the aux channels mainly for effect applications, we suggest to
alter them to post Fader. The difference is that you extract the
respective channels signal from the effect mix, too, when you
turn the LEVEL-control to minimum. You can do this modification
for each channel individually, the choice is yours.
+The f ll wing m dificati ns put y ur s ldering
skills t the test. Only attempt t implement them
if y u feel y u have en ugh past experience.
C nsider hiring pr fessi nal help. Regardless f
wh implements these m dificati ns, they
effectively v id all warranty claims.
+A piece f advice f r the brave: bridge endings that
are t be s ldered sh uld n t be put int the drill
h les. Instead, bridge endings sh uld be s ldered
ab ve the drill h les in a flat fashi n! A bridge sh uld
be s mewhat upwardly curved between b th f
the bases.
1. Power down the unit and unplug the power cord before
you remove the cover from the rest of the housing!
2. The positions in question are found on the part of the circuit
board located perpendicular to the front side. Please
observe figure 5.1.
+H ld the unit s that y u can read the FX/MON
insignia n the circuit b ard. S ldering p ints
sh uld match th se in the illustrati n.
3. Separate the pre fader conductor path.
4. Solder a post fader bridge.
5. Repeat this step on as many channels as desired.
Fig. 5.1: Modification MON/FX pre fader > post fader
5. AUX CHANNELS MODIFICATION

10
EURORACK PRO RX1602
6. SPECIFICATIONS
AUDIO INPUTS
INPUT L/R
Type 1/4" TRS connector,
electronically balanced
Impedance approx. 20 kΩ balanced,
10 kΩ unbalanced
Gain range -οο to +15 dB
Operating level variable, +4 dBu/-10 dBV
(switchable)
Max. input level +22 dBu
Common-mode rejection typ. 44 dB
CMRR @ 1 kHz
AUDIO OUTPUTS
MAIN OUT L/R
Type 1/4" TRS connector,
unbalanced
Gain range -οο to +15 dB
Impedance approx. 120 Ω
Max. output level +22 dBu
MON OUT
Type 1/4" TRS connector,
unbalanced, mono
Impedance approx.120 Ω
Max. output level +22 dBu
PHONES utput
Type 1/4" TRS connector, stereo
Minimum load impedance 100 Ω
SYSTEM SPECIFICATIONS
Bandwidth 20 Hz - 20 kHz +/-0.2 dB
Frequency range 20 Hz - 200 kHz +0/-3 dB
Signal-to-noise ratio < -97 dB
THD 0.0025% @ +4 dB input
1 kHz gain 1
Crosstalk < -70 dB
POWER SUPPLY
Voltage USA/Canada
120 V~, 60 Hz
Europe/U.K./Australia
230 V~, 50 Hz
Japan
100 V~, 50 - 60 Hz
General export model
120/230 V~, 50 - 60 Hz
Power consumption max. 14 W
Fuse 100 - 120 V~: T 630 mA H
200 - 240 V~: T 315 mA H
Mains connection Standard IEC connector
DIMENSIONS/WEIGHT
Dimensions approx. 1 3/4" (44.5 mm) x 19"
(482.6 mm) x 8 1/2" (217 mm)
Weight approx. 2.30 kg (5.07 lbs)
Shipping weight approx. 3.55 kg (7.83 lbs)
BEHRINGER is constantly striving to maintain the highest professional standards. As a
result of these efforts, modifications may be made from time to time to e isting products without
prior notice. Specifications and appearance may differ from those listed or illustrated.
6. SPECIFICATIONS