Audient Summing Amplifier Kurzanleitung
Operational Manual
Version 1.0 –October 2004
Operational Manual
Contents
© Audient v1.0 10/2004
2
Copyright 2004. All rights reserved.
The information in this document is subject to change without notice.
Audient plc makes no warranty of any kind with respect to the material in this document and
shall not be liable for errors contained herein or for incidental or consequential damages
related to the use of the material.
No part of this document may be reproduced without the prior written consent of Audient
plc.
Operational Manual
Contents
© Audient v1.0 10/2004
3
Thank you for buying this audient product.
As can be found throughout the Audient range, your Sumo has been painstakingly designed
and lovingly nurtured to give you years of productive, reliable, mix fattening performance.
To make the most of this, we suggest that you have a good look through this manual before
you get started.
The safety and installation information will help you to set your Sumo up with the minimum
of danger and hassle, while the operational guide will take you on a whistle stop tour of
Sumo’s knobs, dials and flashy lights –along with some handy hints for their use. Finally, if
you’re experiencing any problems Sumo Surgery will root out most set-up and configuration
issues to get you back on track in no time.
Anywhere you see this symbol, you should make sure to read the
adjacent warning. These will prevent you from killing yourself,
blowing up speakers, and wrecking your mix. All of which are to be
avoided.
Text next to one of these symbols is, wait for it… a handy hint.
These are little operational titbits and guidelines to help you find
your way and get the most out of your Sumo.
!
Operational Manual
Contents
© Audient v1.0 10/2004 4
CONTENTS
SAFETY INFORMATION 5
INSTALLATION 7
OVERVIEW –THE BENEFITS OF ANALOGUE SUMMING 8
PLUGS AND SOCKETS
Analogue audio interfaces 10
Digital interfaces 11
HOOKING UP 12
KNOBS, BUTTONS AND FLASHY LIGHTS
Input section 15
Mix Compressor/Peak Limiter 16
Mix master/monitor section 17
Digital section 18
SUMO SURGERY (TROUBLESHOOTING) 19
Why can’t I hear anything? 20
ACCESSORIES 21
SPECIFICATIONS21
WARRANTY 22
Operational Manual
Important safety instructions
© Audient v1.0 10/2004 5
IMPORTANT SAFETY INSTRUCTIONS
WARNING
THIS EQUIPMENT MUST
BE
EARTHED. DO NOT EXPO
SE
TO RAIN OR MOISTURE.
Please read all of the following instructions and save them for
later reference before attempting to connect your Sumo to the
AC power source.
CAUTION
ATTENTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
RISQUE DE
CHOC
NE PAS ENLEVER
Operational Manual
Safety Information
© Audient v1.0 10/2004 6
SAFETY INFORMATION
EARTH This unit is connected via its power cord to the mains safety earth.
NEVER OPERATE THE UNIT WITH THIS EARTH
CONNECTION REMOVED.
COVERS DO NOT remove the covers. Refer servicing to qualified personnel
only.
VOLTAGE Sumo is set to operate only at the voltage shown on the rear panel.
CHECK that the correct voltage is available before connecting the AC
mains supply.
FUSES CHECK that the fuse fitted is of the correct type for the local mains
voltage. ALWAYS replace fuse with the correct type.
MOISTURE DO NOT expose the unit to rain or moisture. If your Sumo should
become so exposed REMOVE the mains power immediately.
HEAT ALWAYS site the Sumo away from sources of heat including direct
sunlight and ensure adequate ventilation around the unit.
Operational Manual
Installation
© Audient v1.0 10/2004 7
INSTALLATION
Unpacking
Your Sumo has been carefully and
meticulously tested before despatch.
Please check for any signs of transit
damage. If any signs of mishandling are
found please notify the carrier and your
dealer immediately.
Mains Power Supply
Fuses
Sumo can be switched to operate at mains
voltages of either 230V or 115V. With the
switch in the 230V position, the unit will
operate without performance degradation
from 210V to 250V. In the 115V setting,
voltages from 105V to 125V will be
accepted. Do not attempt to operate the
unit outside the relevant range defined
above. For 100V operation, please contact
your dealer.
Please note that the fuse ratings are
different for each of the voltage ranges.
20mm T250mA for the 230V setting and
20mm T500mA for 115/100V.
The mains fuse is very unlikely to fail
under normal use and caution should be
exercised if a failure should occur. Check
the mains voltage, the condition of the
mains cord and the integrity of the mains
supply before replacing the fuse.
Mechanical Installation
Care should be taken not to obstruct
the unit’s ventilation holes. Adequate
airflow must be provided within rack
cases above and below the unit to prevent
overheating.
!
Operational Manual
Overview –The Benefits of Analogue Summing
© Audient v1.0 10/2004 8
OVERVIEW –THE BENEFITS OF ANALOGUE SUMMING
Having bought the unit, you’ve probably
figured out that Sumo is a high-resolution
summing amplifier with stereo bus
compressor and peak limiter, not to
mention a handy little monitor section.
Nevertheless, here are a few more
interesting and descriptive words with
which to impress your inquisitive friends.
In essence, Sumo takes a bunch of signals
from several inputs and adds or “sums”
them together to present them to one
output. This is exactly the same process as
takes place in mixing consoles –the mix
bus sums signals from all of the channels
together.
“But my software has a mixer. Why can’t I
just use that?” I hear you cry. Digital
summing has one crucial problem; that
the output bit depth is equal to or less
than each of the internal signals. This
means that when signals are summed,
some data must be thrown away.
Moreover the volume of data discarded in
this process increases with your track
count. It would, of course be unfair to
suggest that modern software performs
this data reduction indiscriminately or
with especially poor results, however
many engineers and producers have found
there to be something lacking in their
digital mixes –often employing an
analogue console purely to make use of its
summing bus.
So what’s so special about the mix bus on
a big console? Well… only the highest of
high end, large format consoles employ
balanced mix buses to reduce crosstalk
and fend off noise. And this is precisely
the kind of mix bus you’ll find in your
Sumo, delivering the sound of a large
format console without the huge
footprint, or price tag.
Not only is Sumo’s summing bus as clean
as a whistle, it has frighteningly high
headroom. This is particularly important
because adding signals means adding their
levels, too. The more signals you add, the
more level you’re likely to find on the sum
bus. Consequently, Sumo has been
designed to handle levels in excess of
+28dBu.
Operational Manual
Overview–The Benefits of Analogue Summing
© Audient v1.0 10/2004 9
This means that Sumo can take whatever
you throw at it without distortion or
noise.
Another feature of large format studio
consoles is the inclusion of a compressor
over the main stereo bus. Consequently,
the bus compressor from the ASP8024
has also been included in Sumo’s design: a
flexible, high quality compressor capable
of polishing a mix to perfection. And
there’s more; we’ve added in a digital
equipment guarding, mix fattening peak
limiter to help your mix stand out without
risking nasty digital distortion.
To cap it all off, the monitor section gives
you hands-on control of your playback
level while the external input allows you to
A/B your mixes against some reference
material, or listen to the playback from
your master recorder.
Optional Extras
If your Sumo is equipped with a digital
card, you’ll be able to output a stream of
lovely 0s and 1s at rates of up to 192kHz
on both AES/EBU and S/PDIF
standards.
As your studio and track counts expand,
you can expand your sumo system with
the addition of up to 3 units, giving you a
total of 64 inputs. If you are feeling
particularly track hungry, then each of the
expansion units can provide 3 more
expansion inputs etc. etc…
Operational Manual
Plugs and Sockets
© Audient v1.0 10/2004 10
PLUGS AND SOCKETS
Audio Interfaces
The 16 inputs are connected via two
Tascam DA88 type female D-Sub
connectors. Interconnect cables are
readily available in pre-wired form from
Audient and from any good cable
manufacturer. You can get these with
different tail types to suit your other
equipment, see the accessories section on
page 18. Always use balanced connections
to reduce any cable interference and noise.
Outputs are provided on male XLR
connectors: two for the main outs and
two for your monitors.
Inserts are connected via TRS (Tip-Ring-
Sleeve) jacks. Rather than an unbalanced
loop on a single cable, there are separate
jacks for sends and returns, providing
balanced connections throughout.
A third D-Sub connector (which breaks
out to XLRs) can provide extender linking
and an external monitor input. The first
two channels connect the external input
to the monitor section, while the
remaining three pairs of channels allow
additional Sumo units to connect directly
into the mix bus.
All of Sumo’s analogue audio connections
operate at +4dBu, the professional
standard, so you may need to ‘pad’
outputs fed to semi-pro equipment.
+ve
signal -ve
signal ScreenChannel
Number D-Sub Pin
124 12 25
210 23 11
321 922
4720 8
518 619
6417 5
715 316
8114 2
Note: All undesignated pins are
unconnected. All screen connections
are joined inside the unit and
connected to metalwork earth.
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