M-Audio Studiophile DSM1
Active Studio Monitors
English
User Guide
Important Safety Instructions
1. READ INSTRUCTIONS
9. HEAT
All the safety and operating instructions should be read before
the appliance is operated.
Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
2. RETAIN INSTRUCTIONS
The safety and operating instructions should be retained for
future reference.
10. CLEANING
The appliance should be cleaned only with dry cloth.
3. HEED WARNINGS
11. POWER SOURCES
All warning on the appliance and in the operating instructions
should be adhered to.
The appliance should be connected to a power supply only of
the type described in the operating instructions or as marked
on the appliance.
4. FOLLOW INSTRUCTIONS
All operating and use instructions should be followed.
12. POWER CORD PROTECTION
Power-supply cord should be routed so that they are not likely
to be walked on or pinched by items placed upon or against
them, playing particular attention to cords at plugs,
convenience receptacles, and the point where they exit from
the appliance.
5. WATER AND MOISTURE
The appliance should not be used near water – for example,
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet
basement, or near a swimming pool, etc.
13. POLARIZED PLUG
6. CARTS AND STANDS
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. When the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete
outlet.
The appliance should be used only with
a cart or stand that is recommended by
the manufacturer.
6A. An appliance and cart combination
should be moved with care. Quick
stops, excessive force, and uneven
surfaces may cause the appliance and
cart combination to overturn.
14. UNPLUG POWER CORD
Unplug this apparatus during lightning storms or when unused
for long periods of time.
7. WALL OR CEILING MOUNTING
This equipment is not designed for use mounted on a wall or a
ceiling.
15. OBJECT AND LIQUID ENTRY
No object filled with liquids, such as vases, etc. shall be placed
on the apparatus.
8. VENTILATION
The appliance should be situated so that its location or
position does not interfere with its proper ventilation. For
example, the appliance should not be situated on a bed, sofa,
rug, or similar surface that may block the ventilation openings,
or places in a built-in installation, such as bookcase or cabinet
that may impede the flow of air through the ventilation
openings.
16. ACCESSORIES
Only use attachments/accessories specified by the
manufacturer.
17. SERVICING
The user should not attempt to service the appliance beyond
that described in the operating instructions. All other servicing
should be referred to qualified service personnel.
At least 30 cm free space around the unit for normal
ventilation is required.
18. DAMAGE REQUIRING SERVICE
The appliance should be serviced by qualified service
personnel when:
a) The power-supply cord or the plug has been damaged; or
b) Objects have fallen, or liquid has been spilled into the
appliance; or
c) The appliance has been exposed to rain; or
d) The appliance does not appear to operate normally or
exhibits a marked change in performance; or
e) The appliance has been dropped, or the enclosure is
damaged.
contents
Chapter 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
What’s in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About the Speakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Chapter 2. Overview of the DSM1 Speaker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Back Panel Connectors and Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 3. Setup and Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setting Up the Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Configuring and Connecting AC Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Up and Power Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Configuring Speaker Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Tips for Best Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Appendix A. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Reference Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Contents
v
vi M-Audio Studiophile DSM1 Guide
chapter 1
Introduction
Thank you for choosing M-Audio®
Features
Studiophile® DSM active reference speakers.
DSM1 speakers have the following features:
• Self-powered, bi-amplified operation
• Selectable analog and digital inputs
• Custom-tuned enclosures
This guide provides installation and operation
instructions for the M-Audio DSM1 speaker.
DSM1 speakers feature high-end design ele-
ments and precision control circuitry, engi-
neered to provide exceptional tonal accuracy,
clarity and dynamic range in a wide variety of
applications.
• Advanced driver design and materials
• Onboard DSP for crossover control, EQ, and
volume trim
What’s in the Box?
• One DSM1 speaker
About the Speakers
• One AC power cable
Amplifiers
• Four acoustic isolation pads
• M-Audio Registration Information Card
M-Audio DSM1 speakers feature built-in
amplifiers.
Bi-Amplification DSM1 HF and LF drivers are in-
dependently powered by two separate, low-dis-
tortion internal power amplifiers.
Class D Design DSM1 Class D amplifiers com-
bine the efficiency and size advantages of a dig-
ital amplifier with the precision, control and
sound quality of linear amplification.
Chapter 1: Introduction
1
Inputs
Drivers
M-Audio DSM1 speakers allow analog or digital
inputs. Input type is selectable with the Input
Select switch on the back panel of the speaker.
Each input type has two available connectors.
LF Driver DSM1 speakers have a 6.5-inch LF
driver with a steel frame and single-piece anod-
ized aluminum diaphragm.
HF Driver DSM1 speakers have a 1-inch HF driver
with a soft-dome ferro-fluid cooled design that
ensures smooth, accurate reproduction of high-
frequency details.
Analog Inputs The analog input signal is sam-
pled on input and processed digitally until it
reaches the power amplifier stage.
Available analog inputs include balanced XLR
and 1/4-inch TRS connectors. These analog in-
puts are summed so that both input connectors
may be used at the same time.
Digital Signal Processing
DSM1 speakers employ 36-bit digital signal pro-
cessing for control of crossover, EQ, and chan-
nel assignment settings.
Digital Inputs The digital inputs automatically
detect the sample rate and bit depth of the in-
put, and accept up to 192kHz/24-bit signals.
Crossover The crossover function is handled by
a digital processor that ensures flat, distortion-
free integration of the LF and HF drivers.
Available digital inputs include AES/EBU and
S/PDIF connectors. Only one digital connector
may be used at a time.
EQ and Placement Settings Six filters allow for
customization of speaker response to a variety of
sonic conditions and speaker orientations in
your studio.
Enclosure
DSM1 speakers feature a high-efficiency, rein-
forced medium-density fiberboard enclosure.
Digital Channel Assignment When working with
digital input, this switch is used to select the
channel to be monitored in the speaker.
Custom Waveguides The front panel waveguides
are designed to maintain accurate frequency re-
sponse and stereo imaging.
Volume Trim The Volume Trim control adjusts
level of the input signal in the digital domain.
Bass Reflex Port A dual-flange bass reflex port
provides enhanced low frequency response and
clarity, while minimizing extraneous noise and
vibration.
2
M-Audio Studiophile DSM1 Guide
chapter 2
Overview of the DSM1 Speaker
This chapter describes the connectors, controls and features of the DSM1 speaker.
Back Panel Connectors and Controls
Analog Input (XLR)
Analog Input (TRS)
Bass Reflex Port
Volume Trim knob
Analog Input Sensitivity
switch
Digital Input (S/PDIF)
Digital Thru (S/PDIF)
Digital Input (AES/EBU)
Digital Channel Assignment
switch
Input Selector
switch
Voltage selector
Power switch
EQ Setting
switches
AC connector
Fuse holder
Figure 1. Back panel of the DSM1
Chapter 2: Overview of the DSM1 Speaker
3
Digital Standby Activates the digital inputs of
the speaker, but automatically puts the speaker
in a low-power standby mode when the digital
clock signal is lost for more than one second (for
example, when the digital source is powered
off). When the clock signal is restored, the
speaker wakes up from standby mode.
Power Connections
AC Connector and Power Switch
The AC connector accepts a standard modular
AC power cord. One power cord is included with
your speaker. Use the Power switch to turn the
speaker on or off.
Analog Inputs
Voltage Selector
The DSM1 speaker provides an XLR analog in-
put connector and a balanced 1/4-inch TRS ana-
log input connector.
Before connecting a DSM1 speaker to a power
source, make sure the Voltage Selector setting
matches your local voltage (100–120V or
220–240V).
The analog input signal is converted to a
96 kHz, 24-bit digital signal for crossover/EQ
processing, and converted back to analog just
prior to the power stage of the driver amplifiers.
Fuse
The fuse protects components of the DSM1
speaker from being damaged by electrical under-
or over-powering, spikes, and other anomalies.
Signals may be sent to the two analog input con-
nectors at the same time. When two analog in-
put signals are present, they are summed.
A 2.5 Amp fuse is required for both the
100–120V and the 220–240V settings.
XLR Connector
Make sure to use a fuse rated at 2.5 Amps.
Do not use fuses of any other rating, or you
risk damage to the unit
The XLR Analog In connector is balanced. (If the
signal source is unbalanced, connect the unused
pin to ground.)
1/4-inch TRS Connector
Inputs
The 1/4-inch TRS Analog In connector is bal-
anced. (If the signal source is unbalanced, con-
nect the unused pin to ground.)
Input Selector Switch
The input selector switch selects between the
following input states for the speaker:
Analog Input Sensitivity Switch
Analog Activates the analog inputs of the
The analog input operating level can be
switched between –10 dBV and +4 dBu. This set-
ting applies to both the XLR and 1/4-inch TRS
analog inputs. For information on the appropri-
ate operating level for your audio source, see the
manufacturer’s specifications.
speaker.
Digital Activates the digital inputs of the
speaker.
4
M-Audio Studiophile DSM1 Guide
Digital Inputs
EQ Settings
The DSM1 speaker provides an AES/EBU Digital
In connector as well as S/PDIF Digital In and
S/PDIF Digital Thru connectors.
The DSM1 speaker has a series of 12 switches for
setting the following EQ controls:
High-Frequency Shelf Sets an adjustable high fre-
quency boost or cut using a built-in HF shelf-
type EQ.
The digital inputs accept sample rates of 44.1,
48, 88.2, 96, 176.4 and 192 kHz (+/– 10 percent)
at 16-bit or 24-bit resolution.
Mid-Range EQ Sets an adjustable midrange fre-
quency boost or cut using a built-in peak/notch-
type EQ.
Only one digital input connector (AES/EBU In
or S/PDIF In) may be used at a time.
Low-Frequency Shelf Sets a low frequency cut us-
ing a built-in LF shelf-type EQ, which lets you
tune the speaker’s bass response to fit your mon-
itoring environment.
AES/EBU Digital In
The AES/EBU digital input is a female XLR con-
nector.
High-Pass Filter Sets a high-pass type EQ, which
lets you establish the lower limit of the speaker’s
frequency response.
S/PDIF Digital In
This S/PDIF connector is for connecting digital
audio from a S/PDIF source device, or from the
S/PDIF Thru connector of another DSM1
speaker.
Desktop 220 Hz Cuts around a center frequency
of 220 Hz using a built-in notch-type EQ, which
lets you compensate for the effects of frequency
buildup when your DSM1 speaker is placed on a
reflective surface.
S/PDIF Digital Thru
This S/PDIF connector passes digital input from
either the AES/EBU Digital In or the S/PDIF Dig-
ital In connector to the S/PDIF Digital In con-
nector of another DSM1 speaker.
Desktop 175 Hz Cuts around a center frequency
of 175 Hz using a built-in notch-type EQ, which
lets you compensate for the effects of frequency
buildup when your DSM1 speaker is placed on a
reflective surface.
Digital Channel Assigment
Desktop 200 Hz By using both the Desktop
220 Hz and the Desktop 175 Hz settings, you
can cut around a center frequency of 200 Hz to
compensate for the effects of frequency buildup
when your DSM1 speaker is placed on a reflec-
tive surface.
The DSM1 speaker has a digital channel assign-
ment switch that lets you monitor the left chan-
nel, right channel, or a summed (mono) mix of
the left and right channels of the digital input.
Volume Trim Control
The Volume Trim control adjusts the level of the
input signal in the digital domain. Trim values
range from –22 dB to +10 dB.
Chapter 2: Overview of the DSM1 Speaker
5
Front Panel
LED indicator
Front panel of the DSM1
Front Panel LED
The LED indicator on the front of the DSM1
speaker indicates the following states:
Front Panel LED States
LED State
Indication
Blue
Analog Input
Digital Input: Lock
Yellow
Digital Input: No Lock
Digital Standby Mode
Clipping
Blue (flashing)
Red
Red (flashing)
Hardware failure
6
M-Audio Studiophile DSM1 Guide
chapter 3
Setup and Operation
This chapter provides instructions for placing,
connecting and configuring DSM1 speakers.
Setting Up the Speakers
Speakers should always be placed to provide bal-
anced, accurate sound in your preferred mixing
position. The exact location depends on the size
and acoustics of the environment where you are
using the speakers.
Correct placement, connection, and configura-
tion ensures optimal performance and safe oper-
ation of your speakers.
In all installations, observe the following guide-
lines:
Getting Started
Unpacking the Speakers
• Place the speakers on quality stands, or
place them in a stable location where they
are suitably isolated from vibration
After opening the box, be sure to reach down
the sides of the speaker to lift it out of its box.
This protects the HF and LF drivers on the front
from being dented or punctured, and prevents
any possible damage to the switches, connec-
tors, and other controls on the back of each
speaker.
• Do not soffit mount or otherwise install the
speakers in an enclosed space. The speakers
require free air flow around the back panel.
Do not restrict air flow around the speakers.
Reusing the Speaker Packaging
Retain your packaging for future use. The car-
tons are durable and reusable, and can be used
to safely transport your speakers.
Chapter 3: Setup and Operation
7
Stereo Positioning
Speaker Orientation
The following diagram shows the recommended
setup for stereo monitoring.
For the best sonic results, DSM1 speakers should
be set in a vertical orientation. Vertical place-
ment minimizes the effects of interference be-
tween the drivers and provides the largest hori-
zontal (side-to-side) listening window as well as
the most stable and consistent frequency re-
sponse and imaging.
0.5m/20"
DSM1 vertical orientation (stereo)
Stereo placement
Speaker Location
Surround Positioning
Make sure speakers are placed symmetrically in
relation to the listening position by doing the
following:
The following diagram shows the recommended
setup for use in a 5.0 surround environment (a
subwoofer is not shown in this diagram).
‹ Place speakers so that the HF drivers are ap-
proximately the same height as your ears in the
mixing position.
CENTER
FRONT RIGHT
FRONT LEFT
‹ Place speaker pairs the same distance from the
two sides of the room.
25o
30o
30o
‹ Place speakers so that the backs of the speak-
ers are a minimum of 6 inches (15 cm) from the
wall to prevent obstruction of air flow in the
bass ports.
o
100
o
135
25o
WITHIN
THIS
WINDOW
REAR LEFT
REAR RIGHT
Surround placement
8
M-Audio Studiophile DSM1 Guide
Installing a Fuse
Configuring and Connecting
AC Power
A 2.5 Amp fuse is required for both the
100–120V and the 220–240V settings.
Be sure to follow the instructions in this section
for the proper configuration of fuses and voltage
settings.
Make sure to use a fuse rated at 2.5 Amps.
Do not use fuses of any other rating, or you
risk damage to the unit
DSM1 speakers must be manually config-
ured for the voltage in your area. Always
check the voltage setting and fuse rating, as
described below, before connecting and
powering your speakers.
To change the fuse:
1 Turn off power to the speaker and disconnect
the AC power cord.
2 Use a small screwdriver to remove the fuse
holder.
Setting the Voltage
„ Make sure the Voltage Selector setting on each
speaker matches your local voltage (100–120V
or 220–240V).
Fuse
holder
Voltage
selector
Fuse holder
3 Remove the currently installed fuse.
4 Install the new fuse in the fuse holder.
Voltage selector
5 Replace the fuse holder so that it clicks into
place.
Chapter 3: Setup and Operation
9
Connecting Power
Connecting Audio
To connect power to the speakers:
This section explains how to make analog and
digital audio connections to DSM1 speakers.
1 Make sure you have set the Voltage Selector
and installed the proper fuse before proceeding.
Connecting Analog Inputs
2 Connect the included AC power cord to the
AC connector on the back panel of each speaker
(one power cord is included with each speaker).
Analog Input (XLR)
Analog Input (TRS)
AC
connector
Input Sensitivity
switch
Analog input section
To connect an analog source:
1 Do any of the following:
AC connector
• Connect a balanced XLR cable to the
XLR In connector on the back panel of the
speaker.
3 Connect the other end of the AC power cord
to your power source.
• Connect a balanced 1/4-inch balanced TRS
cable to the TRS In connector on the back
panel of the speaker.
Power Up and Power Down
If you need to connect an unbalanced ana-
log source, see “Analog Inputs” on page 4.
Always power up your speaker system last (al-
lowing mixers, recorders and other devices to
fully power up first).
2 Connect the other end of the cable to the an-
alog audio source (for example, an analog out-
put from your monitoring system).
Conversely, always mute (or power off) your
speaker system first, before powering off other
devices in your studio.
10 M-Audio Studiophile DSM1 Guide
The Digital Thru S/PDIF port on this speaker is
then connected to the Digital In port on the
other speaker to supply it with its digital audio
input.
Connecting Digital Inputs
S/PDIF Input
Digital Input
(AES shown)
S/PDIF Thru
S/PDIF Input
S/PDIF Thru
AES/EBU Input
Digital input section
DSM1 speakers accept digital input at the
AES/EBU Digital Input (XLR connector) and the
S/PDIF Digital Input.
Only one digital input connector (AES/EBU In
or S/PDIF In) may be active at a time. If the
speaker receives digital input from more than
one digital connector, digital lock may not be
achieved and noise or distortion may result.
In and Thru connections for digital input
(AES source shown)
Digital Channel Assignment
When using digital input, you must configure
the Channel Assign switches on the back of each
speaker to set whether that speaker plays the
Left or Right signal channel, accordingly.
Connecting Digital Sources
AES/EBU and S/PDIF digital protocols carry two
channels of audio (left and right). If you are us-
ing a digital source, you can connect it to either
the AES Digital In or the S/PDIF In of one of the
DSM1 speakers. (It does not matter which
speaker is connected to the source.)
Chapter 3: Setup and Operation 11
To connect a digital source:
Configuring Speaker Settings
Volume Trim Settings
1 Do any of the following:
• Connect an AES cable (XLR) to the
AES/EBU In port on the back of a speaker.
• Connect a S/PDIF digital cable to the
S/PDIF In port on the back of a speaker.
The Volume Trim control lets you match the in-
put sensitivity of speaker to the source.
2 Connect the other end of the cable to the dig-
ital audio source (for example, a digital output
from an M-Audio interface).
If you are monitoring an analog input, make
sure you have set the Analog Input Sensitivity
switch to match the operating level of your in-
put source (–10 dBV or +4 dBu). For information
on the appropriate operating level for your au-
dio source, see the manufacturer’s specifica-
tions. The maximum input levels for each sensi-
tivity setting are shown below.
3 Connect one end of a S/PDIF digital cable to
the S/PDIF Thru port of the first speaker.
4 Connect the other end of the S/PDIF digital
cable to the S/PDIF In port of the second
speaker.
Maximum input levels
5 Set the back panel Channel Assign switch to
L (Left) or R (Right) as appropriate for the loca-
tion of each speaker.
Analog Input Sensitivity
setting
Maximum Input level
(full-scale output)
–10 dBV
3 dBV
+4 dBu
18 dBu
Channel Assign
switch
The Volume Trim control adjusts the level of the
input signal in the digital domain. Trim values
range from –22 dB to +10 dB, in 0.5 dB steps.
Setting the Volume Trim control to 0
maximizes the Signal to Noise ratio.
Channel Assign switch
12 M-Audio Studiophile DSM1 Guide
Setting the Mid-Range EQ
EQ Settings
The Mid-Range EQ lets you compensate for mid-
range resonance or damping that may be cre-
ated by speaker placement or room acoustics. It
offers a low-Q (wide bandwidth) boost or cut.
Start by leaving this switch in the “flat” (0 dB)
position, then experiment with different set-
tings to see if you like the results.
The EQ controls on DSM1 speakers let you ad-
just the response of the speaker to match your
monitoring environment and studio equip-
ment. For EQ frequency graphs for each of these
Setting the High Frequency Shelf EQ
The HF Shelf EQ lets you compensate for high
frequency variations that may be created by
source equipment or room acoustics. Start with
the HF Shelf EQ setting “flat” (0 dB) as this pro-
vides the most natural high-frequency response.
To adjust the Mid-Range EQ:
„ Set switches 3 and 4 to the positions shown
below to activate the corresponding EQ levels.
OFF
OFF
3
4
0 dB
To adjust the HF Shelf EQ:
ON
ON
„ Set switches 1 and 2 to the positions shown
below to activate the corresponding EQ levels.
+1.5 dB
–1.5 dB
–3.0 dB
OFF
OFF
OFF
OFF
1
2
0 dB
ON
ON
ON
ON
+1.5 dB
–1.5 dB
–3.0 dB
OFF
OFF
Mid-Range EQ switches and settings
ON
ON
HF Shelf switches and settings
Chapter 3: Setup and Operation 13
Setting the LF Shelf EQ
Setting the High-Pass Filter
Your choice for the LF Shelf setting depends on
where you place the speakers within a room.
The High Pass Filter lets you adjust the bass roll-
off of your DSM1 speakers. Start with the filter
all the way open (40 Hz setting) and only raise
the cutoff frequency in order to protect the LF
drivers at low frequencies, or to couple your
DSM1 speakers with a subwoofer.
0 dB If you've mounted your DSM1 speakers on
speaker stands away from walls and corners, set
the LF Shelf to 0dB, which will give you the flat-
test near-field frequency response.
To adjust the High Pass Filter:
–1.5 dB If you've mounted your DSM1 speakers
near a wall, or on a reflective surface such as the
meter bridge of your console, set the LF Shelf to
–1.5 dB, which activates a shelving filter to re-
duce the low-frequency buildup.
„ Set switches 7 and 8 to the positions shown
below to activate the corresponding EQ levels.
OFF
OFF
7
8
40 Hz
60 Hz
80 Hz
100 Hz
–3.0 dB If you've mounted your DSM1 speakers
on stands in a corner, set the LF Shelf to –3.0 dB,
which activates a shelving filter to reduce the
low-frequency buildup.
ON
ON
OFF
OFF
–4.5 dB If you've mounted your DSM1 speakers
on a meter bridge (or other reflective surface), as
well as in a corner, set the LF Shelf to –4.5 dB,
which activates a shelving filter to reduce the
low-frequency buildup.
ON
ON
High-Pass Filter switches and settings
Setting the Desktop Filters
To adjust the LF Shelf EQ:
The Desktop filters let you compensate for the
effects of frequency buildup when your DSM1
speaker is placed on a reflective surface such as a
desktop or meter bridge, or within a reflective
surface such as a shelf or case. Experiment with
the EQ options centered around 175 Hz, 200 Hz
(by using the 175 Hz and 220 Hz filters at the
same time), or 220 Hz.
„ Set switches 5 and 6 to the positions shown
below to activate the corresponding EQ levels.
OFF
OFF
5
6
0 dB
ON
ON
–1.5 dB
–3.0 dB
–4.5 dB
OFF
OFF
ON
ON
LF Shelf EQ switches and settings
14 M-Audio Studiophile DSM1 Guide
To adjust the Desktop 220 Hz Filter:
To adjust the Desktop 200 Hz Filter:
„ Set switches 9 and 10 to the positions shown
below to activate the corresponding EQ levels.
„ Set switches 9, 10 11 and 12 to the positions
shown below to activate the corresponding EQ
levels.
OFF
OFF
9
0 dB
9
OFF
OFF
OFF
OFF
10
10
11
12
0 dB
ON
ON
–1.0 dB
–2.0 dB
–3.0 dB
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
–1.0 dB
–2.0 dB
–3.0 dB
ON
ON
Desktop 220 Hz Filter switches and settings
ON
ON
To adjust the Desktop 175 Hz Filter:
„ Set switches 11 and 12 to the positions shown
below to activate the corresponding EQ levels.
ON
ON
ON
ON
OFF
OFF
11
12
0 dB
Desktop 200 Hz Filter switches and settings
ON
ON
–1.0 dB
–2.0 dB
–3.0 dB
OFF
OFF
Tips for Best Performance
DSM1 speakers are built and tested to exacting
standards with features to protect the units from
failure under normal usage. Keep in mind the
following:
ON
ON
Desktop 175 Hz Filter switches and settings
‹ Overdriving the units for prolonged periods
or not observing the warnings set out in this
guide may result in failure.
‹ If distortion occurs, reduce the input level im-
mediately.
‹ Both the HF and LF drivers are delicate and
should not be touched. A damaged driver will
adversely affect the performance of the speaker.
‹ As a precaution, always turn off the units be-
fore plugging or unplugging signal connections
or switching source equipment.
Chapter 3: Setup and Operation 15
Troubleshooting
The LED located on the front of the unit indi-
cates the following states of operation.
Front Panel LED States
LED State
Indication
Blue
Analog Input
Digital Input: Lock
Yellow
Digital Input: No Lock
Digital Standby Mode
Clipping
Blue (flashing)
Red
Red (flashing)
Hardware failure
If the LED is lit solid blue and there is no sound, do
the following:
„ Check that the unit is receiving an analog sig-
nal or valid digital signal.
„ Check the temperature of the rear metal
panel. If it is hot, turn the unit off for a mini-
mum of five minutes to allow it to cool. When
cool, turn the unit on and check for normal op-
eration. If necessary, relocate the unit to ensure
adequate ventilation.
If the thermal shutdown activates a second
time, contact M-Audio customer service.
If the LED is unlit and there is no sound:
„ Check fuse and power connection. If the fuse
is intact and the power connection is good, but
the LED remains unlit with no sound, contact
M-Audio customer service.
16 M-Audio Studiophile DSM1 Guide
appendix a
Specifications
Technical Specifications
DSM1 Specifications
LF Driver
HF Driver
6.5-inch inverted anodized aluminum cone woofer with cone edge reinforcement
30mm voice coil with symmetrical force motor and flux stabilization rings
1-inch soft teteron dome tweeter with neodymium magnet and ferrofluid cooling
Frequency Response 49 Hz–27 kHz +/–3 dB
Crossover
2.7 kHz Linkwitz-Riley 24 dB/octave
Max SPL @ 1 meter 110 dB maximum peak SPL @ 1m for 1 unit (116 dB maximum peak per pair)
Input Sensitivity
LF power amplifier
HF power amplifier
THD+N
+4 dBu pink noise input with Trim level set to 0 dB yields 90 dB @ 1m
100 W (1% THD into 6 Ohms)
80 W (0.5% THD into 6 Ohms)
<0.05% (10 W into 6 Ohms)
Soft Limit feature
Independent anti-clipping limiters: tweeter limited to 0.5% THD, woofer limited to 5% THD
Power Requirements User selectable for 90–130V~ 50/60 Hz or 180–264V~ 50/60 Hz
DSP
36-bit, 192 kHz processing
Protection
Analog Inputs
Digital Inputs
Over current, over temperature, turn-on/off transient, subsonic filter
XLR balanced (20 kOhms) and 1/4-inch TRS balanced (20 kOhms)
S/PDIF In and Thru (75 Ohms) and AES/EBU (110 Ohms);
built-in phase-lock loop (PLL) to reclock incoming bitstreams with low jitter (<250 psec p-p);
44.1, 48, 88.2, 96, 176.4, 192 kHz sample rates
Indicator
RGB LED
Appendix A: Specifications 17
dBV
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
10 Hz 20
50
100
200
500
1K
2K
5K
10K
20K
40K
LF Shelf levels
dBV
5
0
-5
-10
-15
-20
-25
-30
-35
10 Hz 20
50
100
200
500
1K
2K
5K
10K
20K
40K
High-Pass Filter levels
Appendix A: Specifications 19
dBV
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
10 Hz 20
50
100
200
500
1K
2K
5K
10K
20K
40K
Desktop EQ (220 Hz) levels
dBV
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
10 Hz 20
50
100
200
500
1K
2K
5K
10K
20K
40K
Desktop EQ (175 Hz) levels
20 M-Audio Studiophile DSM1 Guide
dBV
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
10 Hz 20
50
100
200
500
1K
2K
5K
10K
20K
40K
Desktop EQ (200 Hz) levels
Appendix A: Specifications 21
22 M-Audio Studiophile DSM1 Guide
WARNING: This product contains chemicals, including lead, known to the State of California to cause cancer,
and birth defects or other reproductive harm. Wash hands after handling.
© 2008 Avid Technology, Inc. All rights reserved. Product features, specifications, system requirements and availabil-
ity are subject to change without notice. Avid, M-Audio and Studiophile DSM are either trademarks or registered trade-
marks of Avid Technology, Inc. All other trademarks contained herein are the property of their respective owners.
Warranty
Warranty Terms
M-Audio warrants products to be free from defects in materials and workmanship, under normal use and
provided that the product is owned by the original, registered user. Visit www.m-audio.com/warranty for terms
and limitations applying to your specific product.
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