Sony SMS-2P User Manual

3-858-673-12(1)

Powered Monitor
Speaker System

Operationg Instructions

Mode d’emploi

Bedienungsanleitung

SMS-2P

EN

F

D

©1997 by Sony Corporation

WARNING

To prevent fire or shock hazard, do not
expose the unit to rain or moisture.

To avoid electrical shock, do not open the cabinet.
Refer servicing to qualified personnel only.

Do not install the appliance in a confined space,
such as a bookcase or buitl-in cabinet because
the mains power switch (MAIN POWER) is
located on the rear exterior.

NOTICE FOR THE CUSTOMERS IN THE
U.S.A.

This symbol is intended to alert the
user to the presence of uninsulated
“dangerous voltage” within the
product’s enclosure that may be of
sufficient magnitude to constitute a
risk of electric shock to persons.

This symbol is intended to alert the
user to the presence of important
operating and maintenance (servicing)
instructions in the literature
accompanying the appliance.

NOTICE FOR THE CUSTOMERS IN
CANADA

CAUTION:

TO PREVENT ELECTRIC SHOCK, DO NOT USE
THIS POLARIZED AC PLUG WITH AN
EXTENSION CORD,
RECEPTACLE OR OTHER OUTLET UNLESS THE
BLADES CAN BE FULLY INSERTED TO PREVENT
BLADE EXPOSURE.

CAUTION

You are cautioned that any changes or modification
not expressly approved in this manual could void
your authority to operate this equipment.

Owner’s record

The model and serial numbers are located on
the rear of the unit. Record the serial number
in the space provided below. Refer to them
whenever you call upon your Sony dealer
regarding this product.

Model No. SMS–2P
Serial No.

2

Table of Contents

Features

Precautions .............................................. 4

Speaker connections and placement ... 5

Names and Functions of parts.............. 6

Specifications .......................................... 8

Characteristic data.................................. 9

• Professional quality inputs with high
handling capacity (Balanced terminal +24
dB, phone and phono terminals +10 dB).

• Allows mixing of two different input
sources.

• Magnetically shielded design allows
placement near display monitors, TVs, etc.

• 2 way speaker and wood cabinet designed
for high fidelity.

• Use of sandwich construction in baffle
board damping.

• Up to 20 of these speakers can be
connected via cascade connections.

This speaker was designed as a reference for
use in recording studios to provide an
accurate reproduction of the mix balance. In
order to convey the full realistic expression
and power of the artist while maintaining a
supreme musical charm, we've carefully
considered each of the individual parts as
well as every inch of the circuit board.

We are confident you’ll enjoy this unique
speaker both in and out of the studio.

EN

3

Precautions

• Remove the protective cover after you have
connected the speaker and placed it in its
final position.

• When listening at large volumes, we
recommend keeping the sound at a level
where it does not distort.

• To prevent damage to the speaker unit, be
sure to attatch the supplied protective
cover when moving the speaker or placing
it in storage.

on safety

• Do not attempt to open the enclosure or
modify the speaker unit.

• Before operating the speaker, be sure that
the operating voltage of your speaker is
identical with that of your local power
supply.

• Unplug the speaker from the wall outlet if
it is not to be used for an extended period
of time. To disconnect the cord, pull the
cord by grasping the plug. Never pull the
cord itself.

• Should any liquid or solid object fall into
the speaker, unplug the speaker and have
the speaker checked by qualified personnel
before operating it any further.

• AC power cord must be changed only at
the qualified service shop.

When turning on or off other
equipment

Lower the volume of the speaker to
minimum.

In case color irregularity is
observed on the nearby TV screen

With the magnetically shielded type of the
speaker system, the speakers can be installed
near a TV set. However, color irregularity
may still be observed on the TV screen
depending on the type of your TV set.

If color irregularity is observed...

Turn off the TV set once, then turn it on after
15 to 30 minutes.

If it still persists...

Check that there is no other source of
magnetism* near the TV set. Any other source
of magnetism can cause color irregularity due
to an interaction with the speaker.

* Examples of sources of magnetism: Rack,

magnets attached to secure the doors of the
TV stand, health tools, magnets used with
a toy, etc.

On installation

• Do not install the speaker near heat sources
such as radiators or air ducts, or in a place
subject to direct sunlight, excessive dust,
mechanical vibration or shock.

• Good ventilation is essential to prevent
internal heat buildup in the speaker. Place
the speaker in a location with adequate air
circulation. Do not place the speaker on a
soft surface or too close to a wall as this
may obstruct the ventilation hole on the
back.

On cleaning the cabinet

Clean the cabinet with a soft cloth lightly
moistened with water. Do not use any type
of abrasive pad, scouring powder or solvent
such as alcohol or benzine.

If you have any questions or problems
concerning your speaker that is not covered
in this manual, please consult your nearest
Sony dealer.

If color irregularity is observed again...

Place the speakers further apart from the TV
set.

4

Speaker Connections and Placement

Placement

The speaker can be placed vertically or
horizontally.

Connections

Be sure to set the POWER switch on the back
panel to OFF before making any connections.

TW LEVEL

MASTER VOL.

VOL

010

VOL

010

BASS TREBLE

–+–+

CH 1 IN

CH 2 IN

CH IN

DIRECT

BREAKER

2HOT

3HOT

Connect only one.

2HOT

3HOT

Balanced(XLR)cord

phone plug cord

POWER

AC IN

Audio phono cord

ON

OFF

When the balanced
input terminal
polarity switch is set
to 3HOT.

To the output
terminals of an
electronic
instrument,
mixing console,
computer, or
audio device
(etc.).

To a wall
outlet

NORMAL

–+010

SEND

CASCADE

RETURN

OUT

Balanced terminal polarity

When the balanced
input terminal
polarity switch is set
to 2HOT.

Notes

• We reccomend not connecting more than one
sound source to each channel.

• The RETURN terminal should only be used to
input the sound output from the SEND terminal
(after looping it through an effector, etc.) or when
connecting several speakers. Connections made to
the RETURN terminal for other purposes will not
allow the sound input to the CH1 and CH2
terminals to be output.

• Pass high impedance sources (like electric guitars)
and low level sources (like microphones) through
a mixer before connecting to the speaker.

To connect several speakers

Be sure to set the POWER switch on the back
panel to OFF before making any connections.

Connect the CASCADE OUT terminal on the
first speaker to the RETURN terminal on the
second speaker, etc. (You can connect up to
20 speakers.)

TW LEVEL

MASTER VOL.

NORMAL

–+010

VOL

SEND

010

VOL

CASCADE

RETURN

OUT

010

First
Speaker

BASS TREBLE

–+–+

CH 1 IN

CH 2 IN

CH IN

BREAKER

2HOT

3HOT

2HOT

3HOT

DIRECT

POWER

AC IN

TW LEVEL

BASS TREBLE

MASTER VOL.

NORMAL

–+–+

–+010

CH 1 IN

VOL

SEND

2HOT

3HOT

010

CH 2 IN

VOL

CASCADE

RETURN

OUT

ON

OFF

2HOT

3HOT

CH IN

DIRECT

010

BREAKER

POWER

ON

OFF

AC IN

To the RETURN
terminal on the
next speaker.

Second
Speaker

How to use the slip stoppers

This unit comes supplied with 4 round (15
mm diameter) slip stoppers. Attach one
under each of the speaker's four corners to
prevent the speaker from moving when
subject to slight vibrations (etc.).

Balanced (XLR) cord

2 3 1

1 : GND
2 : HOT
3 : COLD

1 : GND
2 : COLD
3 : HOT

2 3 1

5

Names and Functions of Parts

Rear

1
2

5 TREBLE control

Turn to the right to increase the level of the
treble. Turn to the left to decrease the level
of the treble.

6 CH 1 IN (channel 1 input)

See next page for details.

TW LEVEL

MASTER VOL.

VOL

010

VOL

010

BASS TREBLE

–+–+

CH 1 IN

CH 2 IN

CH IN

DIRECT

BREAKER

2HOT

3HOT

2HOT

3HOT

POWER

ON

OFF

AC IN

NORMAL

–+010

SEND

CASCADE

RETURN

OUT

SEND terminal

1

Outputs a mix of the sounds input to
channel 1 and channel 2. Connect to an
effector or recording device (etc.). The
sound is output as adjusted by the BASS
and TREBLE.

2 TW LEVEL control

Adjusts the output level of the tweeter.
Turn toward the right to increase. Turn
toward the left to decrease.

3
4

5
6
7

8
9

10

11
12

13

7 CH 2 IN (channel 2 input)

See next page for details.

8 Rear panel guards

Protect the controls on the rear of the
speaker. Located on the left and right.

9 POWER switch

Turns the power to the speaker ON/OFF.
(Before turning the power ON, be sure the
MASTER VOL. control is set to the “0”
position.)

10 AC socket

Connect to a wall outlet (120 V in U.S.A. or
Canada, 220-230 V in Europe) using the
supplied power cord.

11 BREAKER

Press if the pilot lamp on the front panel
does not light when the power is turned
on. This resets the power supply so you
can use the speaker.

12 RETURN terminal

Use to input an external sound source
directly to the speaker’s power amp.

Use this terminal to input sound output to
an effector, or when connecting several
speakers.

3 MASTER VOL. (volume) control

Turning to the right increases the level of
the sound output from the speaker.

4 Bass control

Turn to the right to increase the level of the
bass. Turn to the left to decrease the level
of the bass. (Increasing the level of the bass
when listening at high volumes may cause
the sound to distort.)

6

13 CASCADE OUT terminal

Allows you to output a mix of the sounds
input to channel 1 and channel 2. Use to
output sound when connecting several
speakers.

CH 1 input

213

CH 1 IN

2HOT

3HOT

54

VOL

010

1 INPUT VOL. (channel 1 input level)

control

Turning to the right increases the level of
the sound output from the channnel 1

4 DIRECT switch (Only for Balanced

input terminal)

Setting this switch to DIRECT allows you
to bypass the tone controls and send the
sound from a mixer (etc.) directly to the
speaker's power amplifier. In this case,
BASS and TREBLE adjustments are not
possible. Only the MASTER VOL. and TW
LEVEL can be adjusted.

Note

When the DIRECT switch is set to DIRECT, no
sound will be output to the other speakers (if
other speakers are connected).

2 Pin plug input terminal

Phono plug input terminal for channel 1.
Connect to the output on a piece of audio

equipment (etc.).

3 Standard plug input terminal

phone plug input terminal for channel 1.
Connect to the output on a musical

instrument (etc.).

4 Balanced input terminal

Balanced input terminal for channel 1.
Connect the the out put terminal of a
professionl mixing console (etc).

5 Balanced input terminal polarity

switch

Use to switch the polarity of the channel 1
balanced input terminal.

CH 2 input

VOL

010

1

1 INPUT VOLUME. (channel 2 input

level) control

CH 2 IN

2HOT

CH IN

DIRECT

32

4

3HOT

6

5

5 Balanced input terminal

6 Balanced input terminal polarity

switch

Front

POWER

1

1 Power Indicator

Lights when the POWER switch is set to
the ON position.

2 Pin plug input terminal

3 Standard plug input terminal

7

Specifications

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 6 ohm load driven, from 20 Hz ­20 kHz; rated 40 watts minimum RMS
power, with more than 0.9 % total
harmonic distortion from 250 mW to
rated output.

Speaker system

Speaker unit

Nominal Impedance

Power handling capacity

Sensitivity

Frequency range

Dimensions

Enclosure volume

Mass

Power requirements
North American models: 120 V AC, 60 Hz
Europian models: 220-230V AC, 50/60 Hz
Power consumption 44W

2 way bass reflex

Woofer:

5

⁄

16 cm (6
cone type
Tweeter:

2.5cm (1
type

Woofer:
6 ohms
Tweeter:
6 ohms

Woofer:
50 W
Tweeter:
40 W

107 dB/m

48 Hz - 20 kHz (± 3 dB)
Approx. 239 × 410 × 331

mm (w/h/d)
(9
inches.)
excluding projecting
parts and
controls
Approx. 239 × 410× 365
mm (w/h/d)
(9
inches.)
Including projecting parts
and
controls

Approx. 14 liters

Approx. 13 kg (28 lb 10
oz) excluding protective
cover

inches) dia.

16

inch) dia. dome

7

/16× 16 1⁄8 × 13 1⁄

7

⁄16 × 16 1⁄8 × 143⁄

16

8

Inputs

Input level

Input impedance

Output level

Tone controls

Tweeter level controls

Supplied accessories

Design and specifications are subject to change
without notice.

CH 1
Phono jack x 1
phone jack x 1
XLR jack x 1
CH 2
Phono jack x 1
phone jack x 1
XLR jack x 1
OTHER
RETURN jack x 1

Phono jack : – 10 dBm
(+10dBm)
Phone jack : – 10 dBm
(+10dBm)
Balanced terminal : + 4
dBm
(+24dBm)
RETURN : 0 dBm
(+20dBm)

Phono jack : 10 kilohms
Phone jack : 10 kilohms
Balanced terminal : 600
ohms

SEND jack : (0 dBm)
CASCADE jack : (as same
as RETURN level)

BASS 100 Hz : ±6 dB
TREBLE 10 kHz : ±6 dB

+2.5 dB/-3.5dB

Power cord (1)
Protective cover (1)
Slip stoppers (4)
Instruction manual (1)

8

Characteristic data

Frequency characteristics / adjustable range of tone controls

100

LOW MAX

90

80

70

60

1

50

40

30

20

10

0

FLAT

LOW MIN

20 50 100 200 500 1K 2K 5K 10K 20K 50K

2

1 Output sound pressure level (dB)
2 Frequency (Hz)

Frequency characteristics / adjustable range of tweeter level controls

100

90

80

70

60

50

1

40

30

20

10

0

20 50 100 200 500 1K 2K 5K 10K 20K 50K

Input : Phono Jack (– 30 dB)
Volume : VOL. CH 1 master, max
Anechoic room : 1 meter

2

1 Output sound pressure level (dB)
2 Frequency (Hz)

Input : Phono Jack (– 30 dB)
Volume : VOL. CH 1 master, max
Anechoic room : 1 meter

HI MAX

FLAT

HI MIN

TW LEVEL MAX

FLAT

TW LEVEL MIN

9