ROLAND SPEAKER SYSTEM
SST-151/251
SSW-351
SSM-151
OWNER’S MANUAL
Thank you, and congratulations on your choice of the SST/SSW/SSM Speaker System.
Before using this unit, carefully read the sections entitled: “USING THE UNIT
SAFELY” (p. 2) and “IMPORTANT NOTES” (p. 3). These sections provide
important information concerning the proper operation of the unit. Additionally,
in order to feel assured that you have gained a good grasp of every feature
provided by your new unit, this manual should be read in its entirety. The
manual should be saved and kept on hand as a convenient reference.
Features
Roland’s SST/SSW/SSM speaker systems, designed, developed, and
manufactured in the U.S.A., offer the ideal combination of excellent sound,
superb design, and outstanding value.
• The enclosures (except for the SSM-151) feature a trapezoidal design,
allowing them to be arrayed in radiating clusters.
• The metal speaker grills and 3/4" plywood cabinets are designed to
withstand the rigors of professional use.
• The tweeter features a built-in auto-reset protection circuit to prevent
problems from input overload before they start (not featured on the SSW-
351).
• The SSM-151 can be oriented at two different floor angles (35 and 55 degrees),
allowing selection of the most appropriate angle for your particular stage
environment.
• The crossover network components have been carefully selected to ensure
high input capacity and precise impedance characteristics.
• Speakon® NL4MP (speaker connectors) are featured to allow high-reliability
connections.
• Oversized steel carrying handles help to provide exceptional portability.
*
Speakon® is a registered trademark of NEUTRIK.
Copyright © 1997 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission of
ROLAND CORPORATION.
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101a
•
The unit should be located so that its location or
position does not interfere with its proper venti-
lation.
..........................................................................................................
•
104 Try to prevent cords and cables from becoming
entangled. Also, all cords and cables should be
placed so they are out of the reach of children.
..........................................................................................................
108d: Selection
•
If you need to move the instrument, take note of
the precautions listed below. At least two persons
are required to safely lift and move the unit. It
should be handled carefully, all the while keeping
it level. Make sure to have a firm grip, to protect
yourself from injury and the instrument from
damage.
• Disconnect all cords coming from external
devices.
• Remove the unit from the speaker stand.
Important Notes
In addition to the items listed under “USING THE UNIT SAFELY”, please read and observe the following:
Connection
• Before making any connections, be sure all units in the system are OFF. Also be sure that all amplifier and
mixer volume controls are at MINIMUM.
• Before connecting SST/SSW/SSM Speakers to an external crossover read the specification chart carefully.
Maintenance
• For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water.
To remove stubborn dirt, use a cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to
wipe the unit thoroughly with a soft, dry cloth.
• Never use benzine, thinners, alcohol or solvents of any kind, to avoid the possibility of discoloration and/or
deformation.
Additional Precautions
• To avoid disturbing your neighbors, try to keep the unit’s volume at reasonable levels (especially when it is
late at night).
• To avoid possible breakdown, do not use the unit in a wet area, such as an area exposed to rain or other
moisture.
3
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Making Connections
1. Before you make connections, make sure that the power of all equipment is turned off. Also make
sure that the volume controls on your amplifier and mixer are turned to the minimum position.
2. Use speaker cables to connect the output terminals of the amplifier to the inputs of the speakers.
When connecting speakers, pay attention to the polarity (+/-) of the amplifier.
The SST/SSW/SSM speakers have a nominal impedance of 8 ohms. Check the recommended load impedance of your amplifier.
When connecting speakers in parallel, make sure that the polarity matches. Since the total impedance
of all speakers will decrease if they are connected in parallel, check the recommended load impedance
of your amplifier once again to make sure.
In order to get the best sound quality, please use thick and sturdy speaker cables. Avoid using cheap cables, or shielded cables
intended for use with a guitar. In order to achieve high-reliability connections, we recommend that you use Speakon®
connectors (speaker connectors). When making Speakon® connections, refer to the network circuit diagram in the
specifications.
These speakers are equipped with self-recovering protection circuitry designed to guard the tweeters
from excessively high input and abnormal signals. The circuit is tripped when the speaker is presented
with excessive input, thus preventing sound output from the tweeter; this does not indicate a
malfunction. In such instances, lower the amp volume; the tweeter function is restored automatically
after 5– 10 seconds. Contact a Roland Service Center if the speaker function does not recover properly.
The Roland SST/SSW speakers are designed to allow multiple units to be combined to create high-
output spaker clusters. The SSW-351 speaker system can be driven with a single amp when using its
built-in crossover network, or driven with a multi-amp system when an external crossover is used, and is
also the ideal subwoofer system for use in conjunction with a SST-151/251. In order to take full
advantage of its performance and to protect the speakers, please read the following explanations
carefully.
SST-151/251/SSM-151
Connect the inputs of the SST-151/251/SSM-151 directly to your amplifier. If you wish to add an additional SST-
151/251/SSM-151, connect it in parallel. To connect the additional SST-151/251/SSM-151, use the second
PARALLEL INPUTS an an output.
Basic Connection
Parallel Connection
FULL RANGE PARALLEL INPUTS
FULL RANGE PARALLEL INPUTS
FULL RANGE PARALLEL INPUTS
DESIGNED BY ROLAND AIO DEVELOPMENT CORP.
IN CALINIA, USA
DESIGNED BY ROLAND ADIO DEVELOPMENORP.
IN CALIFRNIA, USA
DESIGNED BY ROLAND AIO DEVELOPMENT CORP.
IN CALIFRNIA, USA
Select any one
of the input jacks.
from the
amplifier
from the
amplifier
(input impedance: 8 ohms)
(combined input impedance: 4 ohms)
4
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SSW-351
The SSW-351 contains a built-in crossover network.
There are several ways in which an additional speaker can be connected to the SSW-351.
Since the HIGH FREQ OUTPUT is routed
The PARALLEL INPUTS can be used as an
1.through the internal crossover network, 2.output to connect an auxiliary woofer or
a signal from which the low range has
been cut will be sent to the connected
speaker.
a full range speaker. A full frequency
range signal will be sent to the
connected speaker.
SSW-351
SST-151/251
SSW-351
SST-151/251
INTERNAL CROSSOVER
INTERNAL CROSSOVER
PARALLEL
INPUTS
HIGH FREQ
OUTPUT
DIRECT
INPUT
FULL RANGE PARALLEL INPUTS
PARALLEL
INPUTS
HIGH FREQ
OUTPUT
DIRECT
INPUT
FULL RANGE PARALLEL INPUTS
FROM
EXTERNAL
CROSSOVER
INPUT ONLY
FROM
EXTERNAL
CROSSOVER
INPUT ONLY
DESIGNED BY ROLAND AIO DEVELOPMENT CORP.
IN CALIFNIA, USA
DESIGNED BY ROLAND AIO DEVELOPMENT CORP.
IN CALIFNIA, USA
DESIGNED BY ROLAND AUDIO DOPMENT CORP.
IN CALIFORNIA
DESIGNROLAND AUDIO DEVELOPMENT CORP.
IN CALIFORNIA, USA
from the
amplifier
from the
amplifier
For superior quality in sound reproduction,
we recommend the use of a reverse polarity
cable for this connection.
In this case, the combined impedance will be 4
ohms.
A method to increase low-range sound pressure
levels.
In this case, the combined impedance will be 8
ohms.
The speakers can be driven by multiple
If you wish to use an external channel
3.amps very simply with the internal
4.divider (crossover network) instead of
crossover network. When driving the
speakers with two power amps (bi-
amping), connect the speakers using the
parallel input jacks.
using the built-in crossover network,
make connections to the DIRECT INPUT.
Pay attention to the crossover frequency
of each speaker that is connected.
SSW-351
SST-151/251
SSW-351
SST-151/251
INTERNAL CROSSOVER
INTERNAL CROSSOVER
PARALLEL
INPUTS
HIGH FREQ
OUTPUT
DIRECT
INPUT
PARALLEL
INPUTS
HIGH FREQ
OUTPUT
DIRECT
INPUT
FULL RANGE PARALLEL INPUTS
FULL RANGE PARALLEL INPUTS
FROM
FROM
EXTERNAL
CROSSOVER
INPUT ONLY
EXTNAL
CROSVER
INPUNLY
DESIGNED BY ROLAND ADIO DEVELOPMENT CORP.
IN CALIFRNIA, USA
DESIGNED BY ROLAND IO DEVELOPMENT CORP.
IN CALIRNIA, USA
DESIGNROLAND AUDIO DEVELOPMENT CORP.
IN CALIFORNIA, USA
DESIGNED BY ROLAND AUDIO DEVELOPMENT COR
IN CALIFORNIA, USA
Crossover
Network
8 ohms
8 ohms
8 ohms
8 ohms
Amplifier
LOW
Amplifier
Amplifier
Channel
Divider
Amplifier
HIGH
Parallel input connection
Carefully read the specifications before
connecting an external channel divider
(crossover network).
The volume balance between the subwoofers (SSW-
351) and full-range speakers (SST-151/251) and be
adjusted with the power amp level settings.
For the crossover frequency, we recommend
frequencies between 100 Hz and 200 Hz.
Using two power amps provides greater headroom
when driving the speakers.
5
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Setting Up the SSM-151
When used as a stage floor monitor, the SSM-151 can be set at two different floor angles.
55°
35°
When setting up monitor speakers, be sure to observe the following points in order to
prevent the speakers from falling over (exercise caution particularly when using the 55-
degree setup, as the speakers may topple more easily in this orientation than when set up
35 degrees).
* Do not sit or place feet on the speakers.
* Do not place the speakers on unstable or inclined surfaces.
* Do not use the speakers as steps.
Specifications
Model
SST-151
SST-251
Bass-reflex
SSW-351
Bass-reflex
18" Woofer
SSM-151
Bass-reflex
Enclosure
Bass-reflex
Speakers
12" Woofer + Horn Tweeter
15" Woofer + Horn Tweeter
12" Woofer + Horn Tweeter
Power Handling
(rated)
(max)
*1
150 W
200 W
200 W
150 W
450 W
600 W
600 W
450 W
Frequency Response
Nominal Impedance
Sensitivity (1 W/1 m)
Crossover Frequency
Connectors
58 Hz–16 kHz
8 ohms
98 dB
52 Hz–20 kHz
8 ohms
45 Hz–1.5 kHz
8 ohms
97 dB
58 Hz–16 kHz
8 ohms
98 dB
100 dB
4 kHz
1.5 kHz
200 Hz
4 kHz
(1/4" phone)
Parallel Inputs x 2
Parallel Input x 1
Parallel Inputs x 2
Parallel Input x 1
Parallel Inputs x 2
Direct Input x 1
Parallel Inputs x 2
Parallel Input x 1
High Freq Output x 1
Parallel Input x 1
(Speakon® NL4MP)
High Freq Output x 1
39.5 kg/87 lbs
Weight
20 kg/44 lbs
31.8 kg/70 lbs
14.5 kg/32 lbs
Dimensions
(W x D x H)
Accessory
*1 EIA RS426A
407 x 407 x 642 mm
16 x 16 x 25-1/4 inches
OWNER’S MANUAL
572 x 407 x 762 mm
22-1/2 x 16 x 30 inches
OWNER’S MANUAL
572 x 559 x 838 mm
22-1/2 x 22 x 33 inches
OWNER’S MANUAL
620 x 400 x 360 mm
24-7/16 x 15-3/4 x 14-3/16 inches
OWNER’S MANUAL
* In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.
Pin Diagram of Speakon® NL4FC
2-
1+
* A Speakon® male connectors used by this device is
SIGNAL TO
SPEAKER SYSTEM
sold separately.
2+
1-
NL4FC PIN DIAGRAM
6
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SST-151
Dimensions
Rear Panel
Network Circuit Diagram
2.2uF
2.7ohm
18ohm
0.64mH
TWEETER
0.64mH
FULL RANGE PARALLEL INPUTS
2.2uF
WOOFER
407(16 ")
1+
1 -
DESIGNED BY ROLAND AUDIO DEVELOPMENT CORP.
IN CALIFORNIA, USA
NL4MP
267(10-1/2")
SST-251
Dimensions
Rear Panel
Network Circuit Diagram
3.3uF
4.7ohm
1.3mH
TWEETER
WOOFER
FULL RANGE PARALLEL INPUTS
2.6mH
572(22-1/2")
10uF
DESIGNED BY ROLAND AUDIO DEVELOPMENT CORP.
IN CALIFORNIA, USA
1+
1 -
NL4MP
432(17")
SSW-351
Dimensions
381(15")
Rear Panel
Network Circuit Diagram
10uF
NL4MP
1+
1 -
HIGH FREQ
OUTPUT
68uF
9mH
INTERNAL CROSSOVER
PARALLEL
INPUTS
HIGH FREQ
OUTPUT
DIRECT
INPUT
572(22-1/2")
FROM
EXTERNAL
CROSSOVER
INPUT ONLY
PARALLEL
INPUT
68uF
DESIGNED BY ROLAND AUDIO DEVELOPMENT CORP.
IN CALIFORNIA, USA
NL4MP
1+
1 -
DIRECT
INPUT
SSM-151
Dimensions
Rear Panel
Network Circuit Diagram
2.2uF
2.7ohm
400(15-3/4")
620(24-7/16")
18ohm
0.64mH
TWEETER
WOOFER
FULL RANGE PARALLEL INPUTS
0.64mH
2.2uF
DESIGNED BY ROLAND AUDIO DEVELOPMENT CORP.
IN CALIFORNIA, USA
1+
1 -
NL4MP
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3*RAD
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