DigiDesign RM1 User manual

Digidesign
®
RM1
™
and RM2
™
Professional Reference Monitors

Copyright
© 2008 Digidesign, a division of Avid Technology, Inc. All rights
reserved.
Product features, specifications, system requirements, and
availability are subject to change without notice.
This guide may not be duplicated in whole or in part without the
express written consent of Digidesign. Avid, Digidesign,
Pro Tools, RM1 and RM2 are either trademarks of Avid
Technology, Inc. in the US and/or other countries. All other
trademarks contained herein are the property or their
respective owners.
THIRD PRINTING 01/08

Communications & Safety Regulation Information
Compliance Statement
The models RM1 and RM2 comply with the following standards
regulating interference and EMC:
• FCC Part 15 Class B
• EN55103-1 E1
• EN55103-2 E1
• AS/NZS 3548 Class B
• CISPR 22 Class B
Radio and Television Interference
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules.
DECLARATION OF CONFORMITY
We, Digidesign, 2001 Junipero Serra Boulevard
Daly City, CA 94014-3886, USA
650-731-6300
declare under our sole responsibility that the products
RM1 and RM2
comply with Part 15 of FCC Rules.
Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device
must accept any interference received, including interference
that may cause undesired operation.
Communication Statement
NOTE: This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try
and correct the interference by one or more of the following
measures:
• Reorient or locate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician
for help.
Any modifications to the unit, unless expressly approved by
Digidesign, could void the user's authority to operate the
equipment.
Canadian Compliance Statement:
This Class B digital apparatus complies with Canadian
ICES-003
Cet appareil numérique de la classe B est conforme à la norme
NMB-003 du Canada
Australian Compliance

CE Compliance Statement:
Digidesign is authorized to apply the CE (Conformité
Europénne) mark on this compliant equipment thereby
declaring conformity to EMC Directive 89/336/EEC and Low
Voltage Directive 73/23/EEC.
Safety Statement
This equipment has been tested to comply with USA and
Canadian safety certification in accordance with the
specifications of UL Standards: UL60065 7th /IEC 60065 7th
and Canadian CAN/CSA C22.2 60065:03. Digidesign Inc., has
been authorized to apply the appropriate UL & CUL mark on its
compliant equipment.
Warning
Important Safety Instructions
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with one
wider than the other. A grounding type plug has two blades and
a third grounding prong. The wide blade or the third prong are
provided for your safety. If the provided plug does not fit into
your outlet, consult an electrician for replacement of the
obsolete outlet.
10) Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.
11) Only use attachments/accessories specified by the
manufacturer.
12) Unplug this apparatus during lightning storms or when
unused for long periods of time.
13) Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any way,
such as power-supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not operate
normally, or has been dropped.
14) The apparatus shall not be exposed to dripping or
splashing and no objects filled with liquids (such as vases)
shall be placed on the apparatus.
Warning! To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture.
15) The apparatus should be connected to a properly-grounded
(earthed) receptacle.
16) The main power switch is located on the back panel of the
RM1 and RM2. The mains cord is used as the mains
disconnect device and should remain accessible after
installation.

Contents v
contents
Chapter 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
What’s in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Digidesign Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
About www.digidesign.com . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
About the Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2. Overview of the RM1 and RM2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connectors and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Front Panel LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 3. Setup and Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Setting Up the Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Configuring and Connecting AC Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Up and Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Configuring Monitor Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Tips for Best Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Appendix A. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Audio Specifications for the Digidesign RM1 and RM2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power Amplifier Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reference Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Digidesign RM1 and RM2 Guidevi

Chapter 1: Introduction 1
chapter 1
Introduction
Thank you for choosing Digidesign® Reference
Monitor Series (RMS) active reference monitors.
These monitors were engineered by Digidesign
with PMC using Advanced Transmission Line
Technology.
This guide provides installation and operation
instructions for the Digidesign RM1™ and
RM2™ speakers.
What’s in the Box?
• One RM1 or RM2 monitor
•OneACpowercable
•OneRJ45cable
• Digidesign Registration Information Card
Features
The following features are provided on both
RM1 and RM2 monitors:
• Active, bi-amped near field monitors
• Digital and analog inputs
• Proprietary drivers, digital electronics, power
amp and cabinet engineering provide unri-
valled tonal accuracy, clarity and dynamic
range with exceptionally low distortion
•OnboardDSP:
• Manages the digital crossover, for clearer
imaging
• Provides gain trim (sensitivity), low- and
high-frequency adjustment and L/R chan-
nel assignment
• Provides Bass Port Emulation, an alternate
listening mode in which the RMS speakers
emulate the tonality of a ported bass reflex
speaker
• Sound dispersion design maintains accurate
frequency response even when listening in
off-axis position
For an introduction to the technology and
designs at work in Digidesign RMS speakers,
see “About the Speakers” on page 3.
RM1

Digidesign RM1 and RM2 Guide2
Digidesign Registration
Review the enclosed Registration Information
Card and follow the instructions on it to quickly
register your purchase online. Registering your
purchase is the only way you can be eligible to
receive complimentary technical support and
future upgrade offers. It is one of the most im-
portant steps you can take as a new user.
Contact your local Digidesign dealer for assis-
tance, and for information on warranty and re-
pair.
About www.digidesign.com
The Digidesign website (www.digidesign.com) is
your best source for information to help you get
the most out of your Digidesign products. The
following are just a few of the services and fea-
tures available.
Product Registration Register your purchase on-
line. See the Digidesign Registration Informa-
tion Card included with your system for instruc-
tions.
Support and Downloads Contact Digidesign
Technical Support or Customer Service; down-
load software updates and the latest online
manuals; browse the Compatibility documents
for system requirements; search the online An-
swerbase or join the worldwide Pro Tools com-
munity on the Digidesign User Conference.
Training and Education Study on your own using
courses available online or find out how you can
learn in a classroom setting at a certified
Pro Tools training center.
Products and Developers Learn about Digidesign
products; download demo software or learn
about our Development Partners and their plug-
ins, applications, and hardware.
News and Events Get the latest news from
Digidesign or sign up for a Pro Tools demo.

Chapter 1: Introduction 3
About the Speakers
The Digidesign RM1 and RM2 are both two-way
(bi-amped) active reference monitors with inno-
vations in amplifier and crossover design and
include PMC’s ATL™ (Advanced Transmission
Line) technology.
ATL Technology by PMC
PMC has taken loudspeaker design to the high-
est level with the use of ATL (Advanced Trans-
mission Line). These designs utilize sophisti-
cated cabinets, proprietary drive units and
special absorption materials.
How ATL Works
The main driver is placed at one end of a long
tunnel (the transmission line), which is com-
prised of a series of internal baffles within the
cabinet. The transmission line is lined with
acoustic material that is designed to absorb the
upper bass range that radiates from the rear of
the main driver.
The lowest frequencies emerge from the large
vent at the end of the tunnel, in phase with the
main driver, extending its LF output. The pres-
sure created within the line controls the main
driver over a wide frequency range, dramatically
reducing unnecessary excursions and the result-
ing distortion.
The mid range in turn appears cleaner and
clearer as it is not masked by harmonic distor-
tion residing in the very low frequencies. This
technology produces a higher SPL and lower
bass extension than a ported or sealed cabinet of
a similar size using identical drivers.
Drivers
The RM1 features a 5 and 1/2-inch LF driver,
while the RM2 provides a 6.7-inch LF driver.
These LF drive units are optimized for an ATL
design.
Both the RM1 and RM2 monitors use an identi-
cal 1-inch, soft dome, ferro-fluid cooled HF
driver.
Amplifier
In the RM series both HF and LF drive units are
independently driven by separate low-distor-
tion, analog-controlled “Class D” power ampli-
fiers. This type of amplifier combines the effi-
ciency and size advantages of a digital amplifier
with the precision, control and sound quality of
linear amplification.
DSP and Crossover
Within the RM series, the crossover function is
handled by a digital 48-bit fixed-point proces-
sor. The powerful DSP processing engine han-
dles the audio signal in the digital domain for
precise control and integration of the drive
units along with the EQ parameters, Bass Port
emulation and Left/Right channel selection.
Clock
The analog input ADC (Analog-to-Digital Con-
verter) is sampled at 96 kHz, 24 bits and is
locked with a discrete low-noise clock oscillator.

Digidesign RM1 and RM2 Guide4

Chapter 2: Overview of the RM1 and RM2 5
chapter 2
Overview of the RM1 and RM2
This chapter describes the connectors and controls on the RM1 and RM2 reference monitors.
Connectors and Controls
Figure 1. Back panel of the RM1 (same as RM2)
Voltage selector
Power
Channel Assign
Gain Trim
LF
HF
Controls and
Anchors for optional mount
AC
Power switch
Fuse
Inputs
Settings
Bass Port Emulation
Analog In
AES3 Digital In
INTHRU

Digidesign RM1 and RM2 Guide6
Power
Voltage Selector
Before connecting the speaker to a power sup-
ply, ensure the voltage selector setting matches
your local main voltage supply (100–115V or
230V), +10% or –15%.
Fuse
The fuse protects your speakers and other com-
ponents of the RMS speakers from being dam-
aged by electrical under or over-powering,
spikes, and other anomalies. Do not use fuses of
any other rating except the ones indicated on
the back panel of the unit.
Fuses and Voltage
You must use different fuses for the 100–115V
and 230V setting. The 100–115V setting uses the
3.15A fuse, and the 230V setting uses the 1.6A
fuse. If you change the setting to 230V, you
must also change to a 1.6A fuse.
To change fuses:
1 Use a small screw driver to remove the fuse
holder.
2 Remove the factory-installed fuse.
3 Install the new fuse in the fuse holder so that
it goes in first.
Power Switch and AC Connector
The AC port accepts an AC power cord included
with your monitor. Once connected, use the
Power switch to turn the unit on or off. To com-
pletely isolate the mains, remove the power
cord.
Inputs
Analog
The analog audio input is a female XLR connec-
tor. The input is electronically balanced with
the following connections.
If the source signal is unbalanced, connect the
unused pin to ground. For optimum results, use
only quality cable and connectors.
Voltage selector
Always make sure to install the proper fuse
after changing voltage settings. See below.
Power switch, fuse cover and AC connector
Analog In connector (XLR) showing pin numbering
Power
Fuse AC
switch
Pin 1 GND Pin 2 +
Pin 3 –

Chapter 2: Overview of the RM1 and RM2 7
Digital
The RM series monitors provide an AES 3 digital
input (XLR), as well as THRU and IN connectors
(RJ45).
AES 3 Digital In
The AES 3 digital audio input is a female XLR
connector. The AES 3 input accepts sample rates
of 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz.
IN
This female RJ45 socket is for connecting AES
digital audio from an RJ45 source device, or
from the THRU connector on your other, pri-
mary RM series monitor.
THRU
This female RJ45 socket provides AES digital au-
dio THRU from either the IN RJ45 or AES 3 XLR
digital input.
Controls and Settings
Each Digidesign RMS speaker provides the fol-
lowing back panel controls and settings.
HF Sets an adjustable high frequency level utiliz-
ing the built-in HF (shelf-type) EQ. The range of
adjustment is –4 dB to +3 dB in 0.5 dB steps.(See
“Setting HF” on page 14.)
LF Sets an adjustable low frequency level utiliz-
ing built-in LF (shelf-type) EQ. The range of ad-
justment is –4 dB to +3 dB in 0.5 dB steps. (See
“Setting LF” on page 14.)
Channel Assign Selects which of the channels of
the AES digital input (left or right) is repro-
duced. (See “Connecting Digital Input” on
page 11.)
Gain Trim Sets the input sensitivity. (See “Setting
Gain Trim” on page 13.)
Bass Port Emulation
The RM speakers are equipped with the ability
to emulate the frequency response of a bass re-
flex ported speaker. Although the ATL design
provides a more accurate bass response with less
distortion, the Bass Port Emulation feature pro-
vides the ability to hear how a mix “translates”
to a ported speaker. (See “Using Bass Port Emu-
lation” on page 15.)
Anchors for Wall Bracket
The four M6 threaded inserts are for use with
the proprietary RM1 and M2 tilt and swivel wall
bracket (not included). Refer to the Digidesign
website (www.digidesign.com) for more infor-
mation.
Digital AES In connector (XLR) showing pin numbering
Digital in connector (RJ45) showing pin orientation
Digital Thru connector (RJ45) showing pin orientation
Pin 1 GND Pin 2 +
Pin 3 –

Digidesign RM1 and RM2 Guide8
Front Panel LED
This LED indicator appears on the front of both
RM1 and RM2 and indicates the following
states:
Front Panel LED States
LED Status Indication
UNLIT No power or momentary power up
mute mode
BLUE Power on
RED Amplifier clipping – Reduce input
level when RED is displayed

Chapter 3: Setup and Operation 9
chapter 3
Setup and Operation
This chapter provides instructions to connect,
configure, and use the Digidesign RM1 and RM2
Reference Monitors.
Correct placement and connection ensures opti-
mal performance and safe operation of your
monitors.
Getting Started
Unpacking the Monitors
After opening the box, be sure to reach down
the sides of the monitor to lift it out of its box.
This protects the HF and LF drivers (on the
front) from being dented or punctured by your
fingers, and prevents any possible damage to
the switches, connectors, and other controls on
the back of each monitor.
Reuse and Recycling
Please retain your packaging for future use. The
cartons are durable, reusable and can be em-
ployed to safely transport your loudspeakers
should they need to be relocated.
Setting Up the Speakers
Reference monitors should always be placed to
provide balanced, accurate sound in your pre-
ferred mixing position. The exact location de-
pends on the size and acoustics of the environ-
ment where the speakers are being used. In all
installation, observe the following guidelines:
• Place the speakers so they are at the same
height as your ears.
• Place the monitors on quality stands, or
mount them on a wall using the proper
brackets.
• DO NOT soffit mount or otherwise enclose
the monitors; they require free air flow
around the back panel.
Placement Guidelines
Always stand them up in their intended orienta-
tion. Do not put the monitors on their sides.
Do not restrict air flow around the speakers.
The right way (left) and the wrong way (right)
Correct Incorrect

Digidesign RM1 and RM2 Guide10
Vertical placement provides the largest listening
window where frequency response and imaging
are stable and consistent. Vertical orientation
minimizes the effects of driver interaction
around the crossover point.
Positioning
Always ensure symmetrical placement of the
monitors in relation to the listening position.
Stereo
The following diagram shows the recommended
setup for stereo monitoring.
Surround Positioning
The following diagram shows the recommended
setup for use in a 5.0 environment.
The RM series monitors provide adjustable gain,
as well as low-frequency and high-frequency re-
sponse controls. These let you optimize the re-
sponse of your RM speakers for your listening
environment.
Configuring and Connecting
AC Power
Be sure to follow the instructions in this section
for the proper configuration of fuses and volt-
age.
Setting the Voltage
Make sure the Voltage Selector setting on both
monitors matches your local main voltage sup-
ply (100–115V or 230V).
Installing the Correct Fuse
Make sure you have installed the fuse appro-
priate for your area and voltage.
Stereo placement
Placement of RMS speakers for a 5.0 installation (sub
shown for example only)
0.5m/20"
FRONT LEFT FRONT RIGHT
CENTRE
TV OR
PLASMA SUBWOOFER
WITHIN
THIS
WINDOW
30o30o
25o
100o
135o
25o
REAR RIGHT
REAR LEFT
PMC speakers must be manually configured
for the voltage in your area. Always check
the Voltage setting and fuse, described be-
low, before connecting and powering your
monitors.
Voltage selector

Chapter 3: Setup and Operation 11
Do not use fuses of any other rating except the
ones indicated on the back panel of the unit.
Connecting AC
To connect power to the monitors:
1 Make sure you have set the Voltage Selector
and installed the proper fuse before proceeding.
(See “Setting the Voltage” on page 10 for de-
tails.)
2 Connect the included AC power cord to the
AC connector on the back panel of each moni-
tor (one cable is included in each box).
3 Connect the other end to your power source.
Connecting Audio
This section explains how to make analog and
digital audio connections to the RM1 and RM2
monitors.
Connecting Analog Input
To connect an analog source:
1 Connect a balanced XLR cable to the
Analog In connector on the back panel of the
monitor.
2 Connect the other end to the analog audio
source (for example, an analog output from a
Digidesign 192 I/O audio interface).
3 Repeat steps 1 and 2 for other RM monitors.
Connecting Digital Input
The Digidesign RMS monitors accept AES input
from the AES 3 Digital Input (XLR connector)
and the IN port (RJ45). RMS monitors clock to
the digital source.
About Digital Thru
AES 3 and RJ45 digital protocols carry two chan-
nels of audio (left and right). When using a dig-
ital source, that source device connects to a dig-
ital input on a single RMS monitor. It does not
matter which of the two you use as the primary
monitor.
The THRU port on this primary monitor is then
connected to the IN port on the other “slave”
monitor (using the included RJ45 cable) to sup-
ply it with its digital audio input.
You then use the Channel Assign switch to as-
sign the Left or Right channel of the AES signal
to the speaker.
Power switch, fuse cover and AC connector
If you need to connect an unbalanced ana-
log source, see “Analog” on page 6.
Fuse
In and Thru connections for digital input (AES source
shown)
AES
THRUIN
(from source)
RJ45
(Left)
Channel
(Right)
Assign
Channel
Assign

Digidesign RM1 and RM2 Guide12
Channel Assign Switches
When using digital input, you must configure
the Channel Assign switches on the back of each
monitor to set whether that monitor plays the
Left or Right signal channel, accordingly.
To connect a digital source:
1 Connect an AES cable (XLR) to the AES 3 Dig-
ital In port on the back of one of your monitors.
This becomes the master monitor.
2 Connect one end of the included RJ45 cable to
the THRU port of the master monitor.
3 Connect the other end of the RJ45 cable to the
IN port of the other monitor.
4 Set the back panel Channel Assign switch to L
(Left) or R (Right) as appropriate for the location
of each monitor.
Connecting Analog and Digital Audio
Simultaneously
Though you can leave multiple inputs con-
nected simultaneously, digital input takes prior-
ity over analog. Whenever a valid digital input
is detected, the analog input is muted. Addi-
tional rules apply when using both digital input
formats, or all three (analog and both XLR and
RJ45 digital).
Digital Input Mode
Whenever a valid digital source signal is de-
tected at the AES IN or RJ45 IN ports, digital in-
put is selected. Analog Balanced IN is muted.
AES input takes priority over RJ45 input if both
are connected and receiving valid digital signal.
The RJ45 THRU port passes data in all digital in-
put modes.
To switch from RJ45 to a valid AES3 input:
1 Power down the monitor. Allow 10 seconds
for it to completely shut down.
2 Power the speaker back on again.
Analog Input Mode
Analog Balanced IN is enabled whenever there is
no valid digital source present at the AES or RJ45
digital inputs. No digital input or THRU occurs
in analog input mode.
Channel Assign switch

Chapter 3: Setup and Operation 13
Power Up and Power Down
Always power up your monitor system last (al-
lowing mixers, recorders and other devices to
fully power up first).
Conversely, always mute (or power off) your
monitor system first, before powering off other
devices in your studio.
Initial Use and the “Break In”
Period
Many mechanical devices with high tolerance
components will take a short time of use to
achieve their best performance. This especially
applies to the soft pliable surrounds (cones) of
both LF and HF drive units of the RMS speakers.
As this material flexes during continued opera-
tion, it will gradually attain the perfect compli-
ance allowing the units to react faster and with
more sensitivity to every nuance of the audio
spectrum. The depth and dynamics of bass will
improve along with the clarity of image place-
ment. The duration of Running/Breaking-in can
take up to 14 hours of reasonable use.
Configuring Monitor Settings
Setting Gain Trim
Gain Trim is a 16-position continuous rotary en-
coder that lets you match the input sensitivity
of the RM1 or RM2 monitor to the source.
The point of maximum sensitivity is when the
pointer is straight down (in the 6 o’clock posi-
tion). Rotating clockwise from this point de-
creases the sensitivity in 1 dB steps to –15 dB.
The Gain Trim encoder has a small opening or
notch to indicate the setting.
Example Gain Trim settings and input levels
Nominal gain setting Input level for full-scale
output
0dB 4dBu
–8 dB 12 dBu
–15dB 19dBu
Gain Trim control (note the indicator notch in the
control)
notch

Digidesign RM1 and RM2 Guide14
Setting HF
Adjustment of the HF level can counteract the
effects of high frequency variation that may be
created by source equipment or room acoustics.
The range of adjustment is –4 dB to +3 dB in
0.5 dB steps.
To adjust HF:
Rotate the HF encoder until it indicates the
desired setting.
For more information on the HF setting, see
“Reference Diagrams” on page 20.
Setting LF
The LF adjustment lets you compensate for the
effects of boundaries. If the monitor is placed
near a wall, ceiling or floor it may increase the
perceived quantity of low frequency energy. If
so, it may be necessary to reduce the LF level
coming from each monitor. If in a large or free-
standing environment, the LF level can be in-
creased. The amount of adjustment required
varies depending on room acoustics and per-
sonal preference.
The range of adjustment is –4 dB to +3 dB in
0.5 dB steps.
To adjust LF:
Rotate the LF encoder until it indicates the de-
sired setting.
For more information on the LF setting, see
“Reference Diagrams” on page 20.
HF shelving (RM1 and RM2)
HF control and markings (current setting is 0)
LF shelving
LF control and markings