Samson Speaker Sub120 User Guide

S U B 1 2 0  
R E F E R E N C E  
S U B W O O F E R  
SAMSON  
OWNERS MANUAL  
®
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Table of Contents  
Introduction  
SUB120 Features  
3
4
SUB120 Layout  
Front View Layout  
Rear Panel Layout  
5
6
Setting Up the SUB120  
Configuring Your Speaker system  
7
Operating the SUB120  
7-8  
Connecting the Sub120  
Using the SUB120 with the Samson DMS80 Monitor System  
Mono Sub With Passive Satellites Using Speaker Inputs  
Mono Sub With Passive Satellites Using Line Inputs  
Mono Sub With Active Satellites  
9-10  
11  
12  
13  
Stereo Sub With Passive Satellites  
14  
SUB120 Wiring Guide  
Specifications  
15  
16  
Copyright 2001, Samson Technologies Corp.  
Printed March, 2001  
Samson Technologies Corp.  
575 Underhill Blvd.  
P.O. Box 9031  
Syosset, NY 11791-9031  
Phone: 1-800-3-SAMSON (1-800-372-6766)  
Fax: 516-364-3888  
2
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Introduction  
Thank you for purchasing the Samson SUB 120 Reference Subwoofer. The Samson SUB  
120 is a self powered 120 Watt subwoofer featuring a 10”, 25mm excursion transducer with  
Butyl surround. The SUB 120 is a perfect add-on to your Samson DMS80 monitor system,  
or for any near field monitor system where extended low end is desired.  
In these pages, you’ll find a detailed description of the features of the SUB120 subwoofer, as  
well as a guided tour through its control panel, step-by-step instructions for its setup and  
use, and full specifications. You’ll also find a warranty card enclosed—please don’t forget to  
fill it out and mail it in so that you can receive online technical support and so we can send  
you updated information about these and other Samson products in the future.  
With proper care and adequate air circulation, your SUB120 will operate trouble free for  
many years. We recommend you record your serial number in the space provided below for  
future reference.  
Serial number:  
Date of purchase:  
Should your unit ever require servicing, a Return Authorization number (RA) must be  
obtained before shipping your unit to Samson. Without this number, the unit will not be  
accepted. Please call Samson at 1-800-3SAMSON (1-800-372-6766) for a Return  
Authorization number prior to shipping your unit. Please retain the original packing materials  
and if possible, return the unit in the original carton and packing materials.  
3
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SUB 120 Features  
SAMSON  
The Samson SUB 120. Here are some of its main features:  
Heavy-duty, 10” Long Excursion (25mm) Transducer With Butyl Surround  
120 Watt Power Amplifier  
Tuned Port Enclosure  
High Pass Outputs for Satellite Speakers  
Variable Crossover 40 - 180 Hz  
Phase Switch  
Line Inputs and Outputs on RCA jacks  
Speaker Terminal Inputs and Outputs  
Auto Sleep Switch  
Volume Control  
Black Satin Finish  
Three-year extended warranty  
4
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SUB 120 Layout  
Front View Layout  
2
1
3
4
5
7
6
1
GRILL SCREEN - Tough cloth and wood frame con-  
struction provides durable and stylish protection  
for the speaker.  
5
BUTYL SURROUND - Provides maximum excur-  
sion while maintaining tight bass response.  
6
7
TUNED PORT - Quiet port design offering linear  
extended low frequency response. (Rear of unit.)  
2
3
4
ENCLOSURE - Rigid MDF Construction.  
FINISH - Sleek black oak finish.  
NON-SKID FEET - Large rubber feet keep enclo-  
sure in place even at high sound pressure levels.  
TRANSDUCER - Heavy Duty 10,” long excursion  
(25mm) extended range low frequency transducer .  
5
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SUB 120 Layout  
Rear Panel Layout  
1
2
6
3
4
5
7
8
9
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
ON  
OFF  
PREAMP LEVEL  
+
R
-
-
L
+
POWER  
PROTECT  
INPUT  
OUTPUT  
0°  
180°  
5
70  
R
R
PHASE  
L
L
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
TO PASSIVE SATELLITE SPEAKERS  
SUB120 120 WATT 10" SUBWOOFER  
SAMSON  
DESIGNED AND ENGINEERED IN THE  
UNITED STATES BY SAMSON TECHNOLOGIES  
CAUTION:TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK  
DO NOT REMOVE BOTTOM COVER  
NON SERVICEABLE PARTS INSIDE  
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE  
REFER SERVICING TO QUALIFIED PERSONNEL  
CAUTION  
RISK OF ELECTRICAL SHOCK  
DO NOT OPEN  
RISQUE DE SHOCK ELECTRIQUE  
NE PAS OUVRIR  
FUSE  
115VAC  
230VAC  
NOT SUITABLE FOR IN-WALL MOUNTING  
MADE IN CHINA  
12  
11  
13  
10  
7
8
PREAMP LEVEL OUTPUT - Sends Low Level  
Output signal.  
1
2
3
4
VOLUME - Controls the amount of output  
level.  
SPEAKER LEVEL INPUT- Accepts full range  
signals from power amplifier.  
SPEAKER LEVEL OUTPUT- Sends full range  
signals to satellite speakers.  
SWEEP HZ - Adjusts the low frequency end  
range of the High-Pass outputs.  
9
POWER/PROTECT LED - Indicates power is on  
and if amplifier is in Protect mode.  
AUTO SLEEP SWITCH - When activated, Sleep  
Mode conserves power by automatically  
turning unit into standby mode after 10 min-  
utes of non-use.  
10  
11  
HEAT SINK - Provides cooling of internal  
power amplifier.  
SERIAL NUMBER - Unit serial number is  
located here.  
12  
13  
FUSE - User accessible fuse.  
5
6
PHASE SWITCH - Allows for 180 degrees out-  
of-phase operation.  
POWER CORD - Heavy duty power cord.  
PREAMP LEVEL INPUT - Accepts Line Level  
input signals from mixer .  
.
6
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Setting up the SUB120  
CONFIGURING YOUR SPEAKER SYSTEM  
Before you start plugging in cables, you should take a minute and decide how you want to interface your new  
subwoofer. There are several ways you can interface the SUB120 and two specific categories should be consid-  
ered. First, Stereo vs Mono operation, and second, whether High (powered) or Low (line) level inputs and outputs  
will be used.  
Common Sub Operation  
In most cases, a common sub ( mono) bass operation  
is desired. This is true for several reasons, but mostly  
ON  
SAMS  
SAMS  
ON  
because low frequencies produced by a subwoofer  
tend to be non-directional. Since low frequency waves  
take so much space to actually develop, you can’t tell if  
the sub-bass is coming from the left or right side.  
Unless of course you’re in a very large room. Because  
of this phenomena, just about all sub-bass material is  
mixed in mono.  
Stereo Sub Operation  
SAM  
SON  
Two SUB120’s can be used in stereo in larger control  
rooms for increased low end. In addition, two  
SUB120’s can be used in stereo, even in smaller con-  
trol rooms, to help minimize standing waves. By using  
two subwoofers at lower power, you can achieve a  
more even response throughout the room.  
SAMS  
ON  
SAMS  
ON  
Placing the SUB120  
Because the low frequencies reproduced by the  
SUB120 are non-directional, you can position the unit  
almost anywhere. It is however, a good idea to keep  
the SUB 120 away from corners. Ideally the SUB120  
should be positioned in the middle, and up close to, the  
wall you are facing in the mixing position.  
SON  
M
SAMS  
ON  
SA  
Operating the SUB120  
SUB120 Control Panel  
The SUB120’s control panel provides the connections and user interface to the SUB120’s internal electronic  
crossover and power amplifier section. The internal amplifier is a 120 Watt power amplifier capable of producing  
incredible bass output. The SUB120 employs an electronic crossover that adjusts the high frequency cutoff point  
for the subwoofer, and also, a high- pass output for your satellite speakers. You will achieve a tremendous bene-  
fit in sound quality by running your satellites speakers from the SUB120’s High-Pass outputs. The reason for this  
is that when your satellite speaker receives the filtered output from the SUB120, it will no longer be looking at the  
frequency below the crossover point. Let’s say your satellite speaker has a natural frequency roll-off at 70 Hz,  
and you are sending full range signal (as low as 20Hz) to the satellite amplifier and speaker. Even though the  
speaker can only reproduce 70Hz and up, the amplifier is still outputting 20-70Hz, which is wasted power and ulti-  
mately turns into heat. By using the SUB120’s High-Pass output, the satellite amplifier and speaker never see  
the frequencies lower than what’s set by the Sweep frequency. This means you’ll have more power dedicated to  
7
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Operating the SUB120  
SUB120 Control Panel - Continued  
to the frequencies you want the satellites to reproduce, resulting in a much cleaner sound with more headroom.  
1
Volume Control  
The volume control is used to adjust the amount of level  
to the SUB120 subwoofer. In addition, the volume  
control will also control the output level of the high-pass  
outputs. Therefore, if you are using the SUB120 without  
using the high-pass outputs (for example, when the  
SUB120 is connected to an external crossover) the  
volume control adjusts the low frequency output of the  
SUB120. If you are using the SUB120’s internal  
electronic crossover to run satellite speakers, then the  
volume control will adjust the overall system level.  
FROM EXTERNAL AM  
SPEAKER OUT  
3
AUTO ON  
ON  
OFF  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
6
R
5
POWER  
0°  
180°  
5
70  
PROTECT  
R
PHASE  
4
L
L
10  
240  
180  
SWEEP Hz  
10  
VOLUME  
+
R
-
TO PASSIVE SATELLITE  
SUB120 120 WATT 10" SUBWOOFER  
2 Sweep Hz  
The Sweep Hz control selects the upper range cutoff frequency of the SUB120’s internal electronic crossover.  
The SUB120’s crossover provides a 12dB per octave Linkwitz Riley filter curve. The Sweep adjusts the highest  
frequency that the SUB120 will reproduce, and at the same time, the high-pass outputs track the selected  
crossover frequency as the lower limit frequency to the satellite speakers.  
Power/Protect LED  
3
The POWER/PROTECT LED is a dual color LED which has three states; OFF, GREEN AND RED. The following  
chart shows the POWER/PROTECT LED and the different operating conditions it represents.  
AUTO ON SWITCH  
LED - OFF  
LED - GREEN  
LED - RED  
ON  
AUTO  
OFF  
Not Applicable  
SLEEP  
SUB120 - OFF  
SUB120 - ON  
SUB120 - ON  
Not Applicable  
PROTECT  
PROTECT  
Not Applicable  
If the SUB120 receives a clipped signal for a long duration of time the unit will shut down and enter PROTECT  
mode. When the SUB120 is in Protect, you will see the POWER /PROTECT LED is lit up in red. If this happens  
simply turn the unit off, wait a minute and then re-power up the unit. The LED should return to a green color again  
indicating normal operation . At this point, readjust the level you’re sending to the SUB120 so that the signal is  
not clipped and the unit will operate properly.  
Auto On Switch  
4
The AUTO ON switch is used to select the SUB120’s power operating mode. When the switch is set to OFF the  
unit is not operational. When the AUTO ON switch is set to the ON position, the unit is always on. To engage  
the SUB120’s SLEEP function, slide the AUTO ON switch to the AUTO position. In this mode, the SUB120 enters  
a stand-by, or "SLEEP" condition after no input signal is sensed for a period of approximately 10 minutes. The  
SUB120 will return to the normal operating mode as soon as it senses a signal present at the inputs.  
Phase Switch  
5
The SUB120 can be switched for inverted phase operation by setting the PHASE SWITCH to the 180° (degree)  
position. Experiment with this switch to provide the best blend between the subwoofer and satellite speakers.  
The Ins and The Outs  
6
The SUB120 features both line level and speaker level inputs and outputs so that connection with passive or  
active satellites is easy. The PREAMP LEVEL INPUTS simply pass the line level signal through to the PREAMP  
LEVEL OUTPUTS. You can use the line inputs and outputs to interface the SUB120 with active monitors. The  
SPEAKER LEVEL INPUTS can be connected from the speaker outputs of a power amplifier, and then the signal  
is sent from the SPEAKER OUTPUTS, which are high-passed, to passive satellite speakers. The following sec-  
tions of this manual detail the set-ups for many typical configurations with both passive and active monitors. In  
addition, there is a detailed cable wiring diagram on page 15.  
8
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Connecting the SUB120  
USING THE SUB120 WITH THE SAMSON DMS80 MONITOR SYSTEM  
Using The DMS80s SUB OUT  
The SUB120 is a great add on to your DMS monitor system providing extended low frequency output. There are  
several ways you can interface your new subwoofer to the DMS80, including using the DMS80’s mono SUB  
OUT, or by using the DMS 80’s LINE OUTs. The following examples outline the connections and operation for  
the SUB120 working with the DMS80 system.  
+
+
+
INPUT  
INPUT  
LINE IN  
LEFT  
RIGHT  
AUX IN  
LEFT  
RIGHT  
LINE OUT  
LEFT  
RIGHT  
SUB OUT  
MONO  
SPEAKER OUTPUTS  
LEFT+  
SPEAKER IMPEDANCE 4-8  
RIGHT- RIGHT+  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
LEFT-  
WARNING  
DO NOT EXPOSE THIS EQUIPMENT  
TO RAIN OR MOISTURE  
AVIS  
RISQUE DE CHOC ELECTRONIQUE  
NE PAS OUVRIR  
CAUTION  
FOR CONTINUED PROTECTION AGAINST RISK  
OF FIRE, REPLACE ONL WITH SAME TYPE FUSE  
Y
ATTENTION  
UTILISER UN FUSIBLE DE  
RECHANGE DE MÊME TYPE  
SERIAL  
NUMBER  
DESKTOP MONITOR SYSTEM STEREO 40W X2 MODEL:DA80  
SAMSON  
MADE IN CHINA  
+
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
ON OFF  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
L
+
POWER  
0°  
180°  
5
70  
PEAK  
R
R
PHASE  
L
L
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
TO PASSIVE SATELLITE SPEAKERS  
SUB120 120 WATT 10" SUBWOOFER  
*
Make the connections between your mixer and your DMS80 monitor system as described in the DMS80s  
users manual and make sure that you turn your mixer all the way down.  
Connect the SUBWOOFER OUTPUT located on the rear panel of the DMS80 to the RIGHT PREAMP  
INPUT on the SUB120.  
Set the SUB120s Volume control to about 6, and since the DMS80s SUBWOOFER OUTPUT is High-  
passed at 100 Hz, set the SWEEP control to 180Hz.  
Now run some audio, like music on a CD, through your mixer and raise the output to the DMS80 monitor  
system to a comfortable listening level.  
Now slowly raise the SUBWOOFER LEVEL control located on the DMS80 front control panel and adjust  
the low frequency output to your taste. You can experiment with the balance between the SUB120 and  
the DMS satellite speakers by adjusting the SUBWOOFER LEVEL control. Once you find the balance  
you like, the SUB120 will track the satellites when you raise or lower your mixers output.  
9
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Connecting the SUB120  
USING THE SUB120 WITH THE SAMSON DMS80 MONITOR SYSTEM  
Using The DMS80s LINE OUTs  
The SUB120 can be connected to the DMS80s by using the LINE OUTS located on the DMS80s rear panel.  
When using the DMS80s LINE outputs you will utilize the SUB120 internal electronic crossover, which will allow  
you to experiment and fine-tune your monitor system. Follow the diagram and instructions below to interface your  
new subwoofer.  
+
+
+
INPUT  
INPUT  
LINE IN  
LEFT  
RIGHT  
AUX IN  
LEFT  
RIGHT  
LINE OUT  
LEFT  
RIGHT  
SUB OUT  
MONO  
SPEAKER OUTPUTS  
LEFT+  
SPEAKER IMPEDANCE 4-8  
RIGHT- RIGHT+  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
LEFT-  
WARNING  
DO NOT EXPOSE THIS EQUIPMENT  
TO RAIN OR MOISTURE  
AVIS  
RISQUE DE CHOC ELECTRONIQUE  
NE PAS OUVRIR  
CAUTION  
FOR CONTINUED PROTECTION AGAINST RISK  
OF FIRE, REPLACE ONL WITH SAME TYPE FUSE  
Y
ATTENTION  
UTILISER UN FUSIBLE DE  
RECHANGE DE MÊME TYPE  
SERIAL  
NUMBER  
DESKTOP MONITOR SYSTEM STEREO 40W X2 MODEL:DA80  
SAMSON  
MADE IN CHINA  
+
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
ON OFF  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
L
+
POWER  
0°  
180°  
5
70  
PEAK  
R
R
PHASE  
L
L
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
TO PASSIVE SATELLITE SPEAKERS  
SUB120 120 WATT 10" SUBWOOFER  
Make the connections between your mixer and your DMS80 monitor system as described in the DMS80s  
users manual and make sure that you turn your mixer all the way down.  
*
Connect the RIGHT and LEFT LINE OUTPUTS located on the rear panel of the DMS80 to the RIGHT  
and LEFT PREAMP INPUTS on the SUB120.  
Turn the SUB120s Volume all the way off, and set the SWEEP control to 100Hz.  
Now run some audio, like music on a CD, through your mixer and raise the output to the DMS80 monitor  
system to a comfortable listening level.  
Now, slowly raise the SUB120s LEVEL control and adjust the low frequency output to your taste. You  
can experiment by listening to the difference when adjusting the crossover point with the SWEEP control.  
Also, listen as you adjust the balance between the SUB120 and the DMS satellite speakers by changing  
the SUB120s LEVEL control. Once you find the balance you like, the SUB120 will track the satellites  
when you raise or lower your mixers output.  
10  
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Connecting the SUB120  
Mono Sub With Passive Satellites Using Speaker Inputs  
The SUB120 is a perfect addition to any near-field monitoring system where enhanced low-end is desired. Below  
is a typical system set using the SUB120 with a mixer, amplifier and a pair of passive satellite speakers. In this  
mode, the signal sent to the satellite is high-passed at 100Hz. The SUB120s input and outputs utilize industry  
standard speaker connectors. Follow the steps below the diagram to set up your system.  
+
+
INPUT  
INPUT  
AMPLIFIER  
SAMSON  
FROM MIXER  
CAUTION  
TO PREVENT SHOCK, DO NOT OPEN. NO USER SERVICEABEL PARTS INSIDE. REFER SERVICING TO  
QUALIFIED SERVICE PERSONNEL. TO PREVENT FIRE OR SHOCK HAZARD. DO NOT EXPOSE TO  
RAIN OR MOISTURE.  
OUTPUT  
PUSH TO RESET  
20A 250V  
CHANNEL  
2
CHANNEL  
1
CAUTION REPLACE WITH THE SAME TYPE FUSE AS INDICATED.  
;
/
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE.  
INPUTS  
TIP RING SLEEVE  
TIP RING SLEEVE  
TIP  
+
-
TIP  
+
-
MINIMUM LOAD IMPEDANCE  
RING  
RING  
STEREO  
+
+
CHANNEL  
1
-
-
CHANNEL 2  
SLEEVE GND  
SLEEVE GND  
~AC INPUT  
115V 60Hz, 800W  
(4 /CHANNEL)  
/
BRIDGED MONO  
-
+
(8  
)
MODE SELECTOR  
SERIAL NUMBER  
POWER  
RATING  
115V  
-
60Hz 800W  
AVIS  
;
RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.  
INPUT  
(10K 0dBu)  
INPUT  
(10K 0dBu)  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN.  
BRIDGED  
STEREO  
/
/
MADE IN KOREA  
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
L
+
POWER  
PEAK  
ON  
OFF  
0°  
180°  
5
70  
R
R
PHASE  
L
L
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
TO PASSIVE SATELLITE SPEAKERS  
SUB120 120 WATT 10" SUBWOOFER  
Lower your mixers master outputs to all the way off.  
Connect the mixers left output to the left input of your power amp and the mixers right output to the right  
input of your power amp. Now, using standard speaker cable, connect the power amps left speaker out-  
put to the SUB120s LEFT SPEAKER INPUT and the power amps right speaker output to the SUB120s  
RIGHT SPEAKER INPUT. To complete the connections, run a cable from the SUB120s LEFT SPEAK-  
ER OUTPUT to the left satellite and from the RIGHT SPEAKER OUTPUT to the right satellite speaker.  
Now adjust the SWEEP control to the desired frequency. Consult your studio monitors owners manual  
for a recommended crossover point. You can also use your ears by adjusting the SWEEP control to the  
frequency that sounds good to you. A good place to start is about 70 Hz.  
Now set the level of your power amp up to the normal operating level. Run an audio signal (like some  
music from a CD) through your mixer and raise the level to a comfortable listening level. Now slowly  
raise the SUB120 Volume control and listen to the low frequency output. Adjust the SUB120 to the level  
of low frequency output that you like. Now, when you raise and lower your mixers output, the SUB120  
and satellites will track at the same relative volume.  
11  
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Connecting the SUB120  
Mono Sub With Passive Satellites Using Line Inputs  
The SUB120 can be operated using line level inputs and outputs. When using the SUB120 at line level, the full  
range signal is maintained at the outputs. Below is a typical system set up using the SUB120 with a mixer, stereo  
power amp and a pair of passive satellite loudspeakers. The SUB120s inputs and outputs utilize industry stan-  
dard RCA connectors. For a detailed wiring diagram, see the section SUB120 Connections on page 17. Follow  
the steps below the diagram to set up your system.  
+
+
INPUT  
INPUT  
AMPLIFIER  
SAMSON  
CAUTION  
TO PREVENT SHOCK, DO NOT OPEN. NO USER SERVICEABEL PARTS INSIDE. REFER SERVICING TO  
QUALIFIED SERVICE PERSONNEL. TO PREVENT FIRE OR SHOCK HAZARD. DO NOT EXPOSE TO  
RAIN OR MOISTURE.  
OUTPUT  
PUSH TO RESET  
20A 250V  
CHANNEL  
2
CHANNEL  
1
CAUTION REPLACE WITH THE SAME TYPE FUSE AS INDICATED.  
;
/
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE.  
INPUTS  
TIP RING SLEEVE  
TIP RING SLEEVE  
TIP  
+
-
TIP  
+
-
MINIMUM LOAD IMPEDANCE  
RING  
RING  
STEREO  
+
+
CHANNEL  
1
-
-
CHANNEL 2  
SLEEVE GND  
SLEEVE GND  
~AC INPUT  
115V 60Hz, 800W  
(4/CHANNEL)  
BRIDGED MONO  
(8)  
/
-
+
MODE SELECTOR  
SERIAL NUMBER  
POWER  
RATING  
115V  
-
60Hz 800W  
AVIS  
;
RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.  
INPUT  
(10K0dBu)  
INPUT  
(10K0dBu)  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN.  
BRIDGED  
STEREO  
/
/
MADE IN KOREA  
FROM MIXER  
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
ON OFF  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
L
+
POWER  
PEAK  
0°  
180°  
5
70  
R
R
PHASE  
L
L
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
TO PASSIVE SATELLITE SPEAKERS  
SUB120 120 WATT 10" SUBWOOFER  
Lower your mixers master outputs to all the way off.  
Connect the mixers left output to the SUB120s LEFT PREAMP LEVEL INPUT and the mixers right out-  
put to the SUB120s RIGHT PREAMP LEVEL INPUT. Now connect the SUB120s LEFT PREAMP  
LEVEL OUTPUT to the left side input of the power amp, and the SUB120s RIGHT PREAMP LEVEL  
OUTPUT to the right side input of the power amp. Connect a speaker wire from the left output of your  
power amp to your left satellite, and then, connect a speaker wire from the right output of your power  
amp to your right satellite.  
Now adjust the SWEEP control to the desired frequency. Consult your studio monitors owners manual  
for a recommended crossover point. You can also use your ears by adjusting the SWEEP control to the  
frequency that sounds good to you. A good place to start is about 70 Hz.  
Now set the level of your power amp up to the normal operating level. Run an audio signal (like some  
music from a CD) through your mixer and raise the level to a comfortable listening level. Now slowly  
raise the SUB120 volume control and listen to the low frequency output. Adjust the SUB120 to the level  
of low frequency output that you like. Now, when you raise and lower your mixers output, the SUB120  
and satellites will track at the same relative volume.  
12  
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Connecting the SUB120  
Mono Sub With Active Satellites  
If you have active studio monitors, installation is easy through the SUB120s LINE LEVEL inputs and outputs.  
Below is a typical system set up using the SUB120 with a mixer and a pair of active satellite speakers. The  
SUB120s input and outputs utilize industry standard RCA connectors. For a detailed wiring diagram, see the  
section SUB120 Connections on page 15. Follow the steps below the diagram to set up your system.  
LINE INPUT  
LINE INPUT  
~AC INPUT  
115V 60Hz, 800W  
~AC INPUT  
115V 60Hz, 800W  
/
/
FROM MIXER  
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
ON OFF  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
L
+
POWER  
PEAK  
0°  
180°  
5
70  
R
R
PHASE  
L
L
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
TO PASSIVE SATELLITE SPEAKERS  
SUB120 120 WATT 10" SUBWOOFER  
Lower your mixers master outputs to all the way off.  
Connect the mixers left output to the SUB120s LEFT LINE INPUT and the mixers right output to the  
SUB120s RIGHT LINE INPUT. Now connect the SUB120s LEFT LINE OUTPUT to the input of the left  
powered satellite, and the SUB120s RIGHT LINE OUTPUT to the input of the right powered satellite.  
Now adjust the SWEEP control to the desired frequency. Consult your studio monitors owners manual  
for a recommended crossover point. You can also use your ears by adjusting the SWEEP control to the  
frequency that sounds good to you. A good place to start is about 70 Hz.  
Now set the level of your power amp up to the normal operating level. Run an audio signal (like some  
music from a CD) through your mixer and raise the level to a comfortable listening level. Now slowly  
raise the SUB120 VOLUME control and listen to the low frequency output. Adjust the SUB120 to the level  
of low frequency output that you like. Now, when you raise and lower your mixers output, the SUB120  
and satellites will track at the same relative volume.  
13  
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Connecting the SUB120  
Stereo Sub With Passive Satellites  
Two SUB120s can be used with any pair of passive or active monitors. Below is a typical system set using two  
SUB120s with a mixer, stereo power amp and a pair of passive satellite loud speakers. The SUB120s input and  
outputs utilize industry standard RCA connectors. For a detailed wiring diagram, see the section SUB120  
Connections on page 15. Follow the steps below the diagram to set up your system  
+
+
INPUT  
INPUT  
AMPLIFIER  
SAMSON  
CAUTION  
TO PREVENT SHOCK, DO NOT OPEN. NO USER SERVICEABEL PARTS INSIDE. REFER SERVICING TO  
QUALIFIED SERVICE PERSONNEL. TO PREVENT FIRE OR SHOCK HAZARD. DO NOT EXPOSE TO  
RAIN OR MOISTURE.  
OUTPUT  
PUSH TO RESET  
20A 250V  
CHANNEL  
2
CHANNEL  
1
CAUTION REPLACE WITH THE SAME TYPE FUSE AS INDICATED.  
;
/
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE.  
INPUTS  
TIP RING SLEEVE  
TIP RING SLEEVE  
TIP  
+
-
TIP  
+
-
MINIMUM LOAD IMPEDANCE  
RING  
RING  
STEREO  
+
+
CHANNEL  
1
-
-
CHANNEL 2  
SLEEVE GND  
SLEEVE GND  
~AC INPUT  
115V 60Hz, 800W  
(4 /CHANNEL)  
/
BRIDGED MONO  
-
+
(8  
)
MODE SELECTOR  
SERIAL NUMBER  
POWER  
RATING  
115V  
-
60Hz 800W  
AVIS  
;
RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.  
INPUT  
(10K 0dBu)  
INPUT  
(10K 0dBu)  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN.  
BRIDGED  
STEREO  
/
/
FROM MIXER  
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
FROM EXTERNAL AMPLIFIER  
SPEAKER OUTPUT  
AUTO ON  
PREAMP LEVEL  
AUTO ON  
ON OFF  
PREAMP LEVEL  
INPUT OUTPUT  
+
R
-
-
L
+
+
R
-
-
L
+
POWER  
PEAK  
POWER  
PEAK  
INPUT  
OUTPUT  
ON  
OFF  
0°  
180°  
0°  
180°  
5
70  
5
70  
R
R
R
R
PHASE  
PHASE  
L
L
L
L
0
10  
40  
180  
0
10  
40  
180  
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
VOLUME  
SWEEP Hz  
+
R
-
-
L
+
Lower your mixers master outputs to all the way off.  
Connect the mixers left output to the left side SUB120s LEFT PREAMP INPUT and the mixers right  
output to the right side SUB120s RIGHT PREAMP LEVEL INPUT. Now connect the left SUB120s LEFT  
PREAMP OUTPUT to the left side input of the power amp, and the right SUB120s RIGHT PREAMP  
LEVEL OUTPUT to the right side input of the power amp. Connect a speaker wire from the left output of  
your power amp to your left satellite, and then, connect a speaker wire from the right output of your  
power amp to your right satellite.  
Now adjust the SWEEP control to the desired frequency. Consult your studio monitors owners manual  
for a recommended crossover point. You can also use your ears by adjusting the SWEEP control to the  
frequency that sounds good to you. A good place to start is about 70 Hz.  
Now set the level of your power amp up to the normal operating level. Run an audio signal (like some  
music from a CD) through your mixer and raise the level to a comfortable listening level. Now slowly  
raise the SUB120 Volume control and listen to the low frequency output. Adjust the SUB120 to the level  
of low frequency output that you like. Now, when you raise and lower your mixers output, the SUB120  
and satellites will track at the same relative volume.  
14  
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SUB120 Connections  
SUB120 Wiring Guide  
There are several ways to interface the SUB120 depending on your exact monitoring set-up. The SUB120 fea-  
tures both Preamp Level and Speaker Level inputs and outputs, so connecting to any active or passive satellites  
speakers is easy. Follow the cable diagrams below for connecting your monitor system.  
Speaker Cable (Un-Shielded)  
Positive  
Positive  
Negitive  
Negitive  
Note: Just about all un-shielded speaker wire will have a marking indicating the negative side. To avoid phase cancelation  
problems, be sure to maintain the correct connection for the positive and negative sides throughout your system.  
Unbalanced 1/4to RCA Cable  
Tip (signal)  
Tip (signal)  
Sleeve (ground)  
Tip (signal)  
Sleeve (ground)  
Sleeve (ground)  
Un-Balanced XLR to RCA Cable  
Tip (signal)  
Hot (2)  
Common (1)  
Tip (signal)  
2
1
1
2
3
3
Cold (Pin 3)  
(no connection)  
End View Solder Points  
Cold (3)  
Sleeve (ground)  
Male XLR  
Sleeve (ground)  
15  
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Specifications  
+40  
+20  
d
0
b
u
-20  
-40  
20  
50  
100  
200  
500  
Hz  
1k  
2k  
5k  
1k 20k  
Sub 120 Frequency Chart  
Specifications  
Transducer:  
Amplifier  
10", Long Excursion ( 25mm ) Transducer  
Power Rating:  
120 Watts RMS  
Frequency response  
Sensitivity:  
30Hz- 300Hz+/-3 dB  
94dB SPL @ 1 W/1m  
Speaker Input  
Connector:  
Push Terminal  
Speaker Output  
Connector:  
High-passed.  
Push Terminal  
Line Input  
Connector:  
Un-Balanced  
RCA - FEMALE  
Line Output  
Un-Balanced  
RCA - FEMALE  
Connector:  
Crossover Frequency:  
Variable 40Hz 180Hz  
Enclosure  
Construction:  
Finish:  
MDF (Medium Density Fiberboard)  
Black Vinyl  
Feet:  
Large Rubber  
Dimensions:  
Weight:  
17(h) x 14 (w) x 16.25 (d)  
432 mm (h) x 356 (w) x 413 (d)  
39 lbs.  
17.75 kg.  
16  
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Samson Technologies Corp.  
575 Underhill Blvd.  
P.O. Box 9031  
Syosset, NY 11791-9031  
Phone: 1-800-3-SAMSON (1-800-372-6766)  
Fax: 516-364-3888  
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