M-Audio Studiophile CX5 Manuel utilisateur

Studiophile™

CX5

User Guide

English

StudiophileTM CX5 User Guide

1. Introduction

Thank you for choosing the M-Audio CX5 bi-ampliﬁed studio monitors. The CX line of

loudspeakers build on M-Audio’s legacy of high performance studio monitors and provide

accurate, high-resolution playback that is free of audible distortion and coloration. This

allows you to hear everything that is in your source recordings so that you can create better

mixes.

Even if you are experienced with recording and mixing, please take a moment to read

through this guide. It will give you valuable information about how to set up your CX

monitors and will help you get the most out of your new purchase.

2. What’s in the Box?

This package contains:

Pair of CX5 studio monitors

Pair of IEC power cables

Printed acoustic frequency response plot for each speaker

This User Guide

3. About CX Studio Monitors

Typical mass-market loudspeakers sound pleasing because their designs incorporate a

deliberately uneven, non-linear frequency response that artiﬁcially enhances certain bass

and treble frequencies. While it may be quite enjoyable to hear ﬁnished albums on such

speakers, actually mixing on this type of monitor is not recommended since such speakers

tend to “smooth over” problem areas and do not reveal everything that should be ﬁxed

during a mix.

Unlike typical mass-market speakers, M-Audio’s CX line of bi-ampliﬁed studio monitors

have been designed to provide accurate, highly detailed, reliable playback that is free of

distortion or coloration. This is done by having a tightly integrated system in which the CX

drivers, internal electronics (ampliﬁers, crossover, etc.), and enclosure all work together

to provide accurate bass, smooth high-frequency transient response, and a highly linear

frequency response through the entire audible range of the speaker. This allows you to

hear everything in your recorded tracks—the good and the bad things—so that you can spot

and ﬁx problems and ultimately create great mixes that “translate” well to other speakers

and audio playback systems.

English

Note that the placement and

orientation of the CX monitors

within your studio is important

and correctly placed speakers will

result in improved imaging, clarity,

and overall performance. This

topic is covered in detail in the

“Setting up CX Monitors” section

of this guide.

Also note that the CX monitors

feature several switches that

help you contour the speaker

to your speciﬁc studio. When

these switches are left in their

default positions, the CX monitor

will exhibit the response characteristics found on the printed acoustic frequency

response plot that ships with each speaker. These anechoic* measurements represent

performance of the speaker in an “ideal” environment similar to that found in a

high-end recording studio with carefully tuned acoustics. In the real world, however, the

acoustics of your speciﬁc studio (or the placement of your speakers within the studio)

may cause your monitors to exhibit too little (or too much) bass, midrange, or treble.

To help compensate for this, the rear-panel switches contour the frequency response

of the speaker speciﬁcally to your studio. These switches are covered in detail in the

“About the Rear-Panel EQ Contour Switches” section of this guide.

*About anechoic chambers:

An anechoic chamber is a room in which the

ﬂoor, ceiling, and all walls are covered with

sound-absorbent acoustical wedges. These

wedges prevent sounds created within the room

from reﬂecting back and inﬂuencing the acoustic

measurement of the loudspeaker.

Anechoic chambers are considered to be

acoustically “neutral” spaces since the room itself

does not impart any kind of sound to an acoustical

source contained within the room. Because of

this, loudspeakers (including CX monitors) are

commonly measured and tuned in such rooms.

It’s in the details:

Did you know the shape and materials of a speaker cabinet can greatly affect the overall

sound of a speaker?

Your CX monitors feature thick walls and a carefully placed internal brace to prevent the

speaker from resonating at low frequencies. This means that the speaker cabinet itself will

not ring along with the low frequency sounds in your mix (such as a kick drum or a bass).

This translates into more accurate bass response.

Furthermore, the rounded (“radiused”) edges and contoured waveguide surrounding the

tweeter are not just cosmetic touches intended to improve the appearance of the speaker.

These features help spread high frequencies evenly around the room and widen the “sweet

spot” between the two speakers.

English

StudiophileTM CX5 User Guide

4. Product Features & Speciﬁcations

CX5

5 ¼” woofer with 1 ½” voice coil

Waveguide loaded silk-dome tweeter with 1¼” voice coil

Bi-ampliﬁed class A/B ampliﬁers

50W woofer

40W tweeter

Frequency response: 50Hz to 30kHz

(+/- 3dB)

XLR, 1/4” TRS, and RCA inputs

Magnetically shielded for placement near CRT (tube-based) monitors and

televisions

Rear panel contour switches to optimize placement within any studio

Sturdy, acoustically inert 1” front and rear MDF bafﬂes to prevent cabinet

resonances

Flared rear ﬁring port for audibly increased system headroom

Optimized internal bracing to minimize sonic “coloration” caused by the cabinet

Radiused (rounded) cabinet edges and acoustical waveguide for even high-

frequency dispersion

Speaker protection:

• Output current limiting

• Over-temperature

• Transient on/off protection to prevent speaker “pops”

• Subsonic lter

• External mains fuse

5. Hardware Controls and Indicators

Rear Panel

1Input Gain Knob: This knob adjusts

the gain level of the XLR/TRS 3

and RCA 2inputs. The gain is at

minimum when the knob is turned fully

counter-clockwise; the gain is set to its

maximum level when the knob is turned

fully clockwise.

2RCA Input: This connector accepts

line-level signals from audio sources

with unbalanced RCA-style outputs.

3XLR/TRS Input: This “combo” input

jack accepts both XLR and 1/4”

TRS-type connectors. Connect your

audio interface, mixer, or other line-level

audio source to this jack.

▶NOTE: The XLR/TRS and RCA inputs are summed (i.e., mixed together) before arriving

at the CX ampliﬁer and it is possible to have two sound sources connected to a speaker

at the same time. However, it is recommended that you do not play audio through both

connectors simultaneously as this may overload the inputs and result in clipping (distortion)

at the inputs.

4Power Switch: This switch powers your

CX monitors on and off.

5Power Connector: This socket accepts

a standard IEC-type power cable.

6Input Voltage Selector: This recessed

switch adjusts the input voltage from

100-120V or 220-240V and allows your

CX monitor to be used worldwide. Make

sure this switch is set correctly for your

country to prevent damage to the speaker.















  

TIP: Power outlets in North

America, Japan, and many parts

of South America usually supply

between 100V and 120V whereas

outlets in Europe and most of Africa

and Asia provide between 220V and

240V. If you are not sure about your

region, be sure to check your power

outlet’s rating and set the Input

Voltage selector before connecting

and switching on your CX monitors.

English

StudiophileTM CX5 User Guide

7Acoustic Space Switch: This switch allows you to set a “shelf” EQ to tailor low

frequency response to your speciﬁc studio. See the section entitled “About the

Rear-Panel EQ Contour Switches” to learn more about this switch.

8HF Trim Switch: This switch allows you to adjust the high-frequency response

of the speaker to your speciﬁc studio. See the section entitled “About the Rear-

Panel EQ Contour Switches” to learn more about this switch.

9MF Boost Switch: This switch allows you to contour the midrange response of

the speaker to your speciﬁc studio. See the section entitled “About the Rear-

Panel EQ Contour Switches” to learn more about this switch.

10 LF Cutoff Switch: This switch sets the low-frequency cutoff point of your CX

monitor. See the section entitled “About the Rear-Panel EQ Contour Switches”

to learn more about this switch.

Front Panel

11 Power LED: This blue LED illuminates when the monitor is receiving power and

the rear panel Power Switch 4is in the “ON” position.



6. Connection Diagram

M-Audio CX monitors feature balanced XLR/TRS “Combo” and unbalanced RCA-type

analog inputs on the rear panel. Connect the outputs of your mixer, audio interface, or

other line-level device to these inputs.

!UDIO)NTERFACE

"ALANCED423TO"ALANCED423

-IXER

"ALANCED8,2TO"ALANCED423

#ONTROL2OOM2OUTER

"ALANCED423TO"ALANCED8,2

0REAMPLIFIER0ROCESSOR

5NBALANCED2#!TO5NBALANCED2#!

▶NOTE: the XLR/TRS and RCA inputs are summed (i.e., mixed together) before arriving

at the CX ampliﬁer and it is possible to have two sound sources connected to a speaker

at the same time. However, it is recommended that you do not play audio through

both connectors simultaneously as this may overload the inputs and result in clipping

(distortion) at the inputs.

TIP: If your mixer, interface, or other audio source features both XLR/TRS

and RCA-type outputs, use the XLR or TRS connectors instead of the RCA

connectors whenever possible. XLR and TRS cables incorporate a “balanced”

design that carries a signal over three conductors (“hot,” “cold,” and “ground”)

instead of two conductors as found in RCA cables (“hot,” and “ground”). This

results in lower noise, higher rejection of radio-frequency (RF) interference, and

better overall ﬁdelity. If XLR/TRS jacks are unavailable, use RCA-style cables

but try to keep the cables as short as possible.

English

StudiophileTM CX5 User Guide

7. Setting up CX Monitors

The conﬁguration and placement of your CX monitors

within your studio may affect the performance of the

speakers. Use the following tips to achieve the best

possible performance out of your CX monitors:

Speaker Placement

Place the CX monitors so that the two speakers

and the engineer form an equilateral triangle when

viewed from above. Angle the speakers slightly

inward so that the woofer and tweeter face the

engineer.

In general, it is recommended that CX monitors

be placed at least one foot away from the nearest

wall, ceiling, or any other large, ﬂat surface (the reason

for this is covered in detail in the following chapter of this

guide). If practical considerations such as limited studio

space make this impossible, CX monitors include an

Acoustic Space Switch 7to compensate for placement

near walls and corners. See the following chapter of this

guide to learn more about this switch.

Speaker Height

Position the speakers so that they are parallel to the ground and that your ears are

between the midpoint of the woofer and the tweeter.

Speaker Orientation

If possible, place CX monitors in their upright position and

avoid laying the speakers on their sides. The CX woofer

and tweeter are vertically aligned and will provide the best

performance when the speakers are placed upright. Placing

them on their sides may create strong reﬂections from

nearby surfaces resulting in spectrally unbalanced sound.

If your CX monitors must be oriented horizontally due to

space or line-of-sight considerations, place the speakers so that their tweeters are on

the “inside” to improve imaging.

Tw eeters

TIP: If possible, place your

CX monitors on speaker stands

instead of your desk top. Desks

tend to resonate sympathetically

at low frequencies and may

adversely affect the bass response

of your monitors. If speaker

stands are not possible due to

space restrictions and you notice

a buildup in bass, try placing

the monitors on “speaker pads”

to acoustically de-couple the

monitors from the desk.

Left Monitor Right Monito

About the Rear-Panel EQ Contour Switches

These switches allow you to tailor

the EQ curve of your CX monitors

to complement the frequency

response of your studio.

Since studio monitors (including

the CX series) are designed to

have a ﬂat frequency response, you may be wondering why these speakers include

additional EQ switches. These switches are included for three reasons:

1. Size, shape, and acoustical treatment of your speciﬁc studio:

CX monitors are tested and tuned in an anechoic chamber to be as linear (ﬂat)

as possible. This means that leaving the switches set to their default settings will

result in the printed acoustic frequency response plot when monitoring takes place

in an “ideal” environment similar to those found in high-end recording studios. In

these studios, acousticians carefully determine the size and shape of the control

room, placement of the studio monitors and large furniture, construction materials

of the walls and ceiling, as well as all acoustical treatments that must be applied to

various parts of the room. All this ensures that studio monitors will sound as ﬂat and

accurate as possible at the “mixing position.”

In the real-world, however, most project and home-based studios are set up in

preexisting rooms where the size/shape of the room cannot be easily modiﬁed to

improve acoustics. This means that the design of the room itself may have adverse

effects on the frequency response of the monitors (i.e, sound reﬂections from ﬂat

surfaces in the room may cause the monitors to not sound linear). For that reason,

the CX line features “corrective” EQ switches to compensate for adverse effects

that may be caused by your room.

2. Placement of the CX monitors within your studio:

The proximity of your CX monitors to the walls (and ﬂoors/ceilings) may adversely

affect the frequency response of what you hear at the mixing position. This is

because all speakers radiate low-frequency sounds in all directions—not just toward

the mixing position. If there are large, ﬂat surfaces (such as walls or ceilings) within

one foot of the speaker, these surfaces act as low frequency “sound reﬂectors” that

return bass energy projected from the rear of the speaker back into the studio. This

can result in bass that sounds “tubby” and exaggerated.

English

StudiophileTM CX5 User Guide

3. Using a subwoofer:

If you plan to use a subwoofer with your CX monitors, you will need to ﬁlter out low

frequency sounds so that only the subwoofer plays low-frequency sounds (the CX

monitors will only play midrange and high-frequency sounds, in this scenario). This

needs to be done so that the subwoofer and CX monitors do not both play the same

low-frequency sounds, causing a greatly exaggerated bass response within your

studio.

The CX line of monitors address all three of these issues with the following switches:

Acoustic Space Switch 7

As stated earlier in this section, your CX

monitors should ideally be placed at least one

foot away from the nearest wall, ceiling, or

other large, ﬂat surface. In the real-world, this

may be impractical due to space limitations

within your studio. For that reason, CX

monitors feature an Acoustic Space Switch.

This switch compensates for placement near

walls by “shelving” (reducing) frequencies below 200 Hz. This switch should be set

as follows:

0dB This default setting should be used if the monitors are placed at least one

foot away from the nearest wall.

-2dB This setting reduces frequencies below 200 Hz by 2dB. Use this setting if

the speakers must be placed closer than one foot from the nearest wall.

-4dB This setting reduces frequencies below 200 Hz by 4dB. Use this setting if

the speakers must be placed within one foot of the corner of a room (i.e.,

the intersection of two walls).

TIP: Be sure to leave at least

3” of space between the rear of

the speaker and a wall to allow

the rear-ﬁring port to “breathe”

properly. Placing the speaker

any closer than 3” may adversely

affect low-frequency response.

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