HI LEVEL IN
Or
L
L
R
LINE IN
MIN MAX 50Hz 150Hz
POWER
ON
OFF
FUSE 1A/250V
Made In China
GAIN
FREQ
FROM AMPLIFIER
120 VAC
100 WATTS
60 HZ
5
1
6
2
7
4
3
1A 250V
Figure A
on your purchase of a OSD powered subwoofer system. Your new subwoofer is one of the most exciting home entertainment electronic products available,
adding impact and realism to recorded music and the wide variety of movies. Once set-up and properly adjusted, it should give you movie theatre experience
at the comfort of your home.
Power Switch - This two position switch controls the power status of the subwoofer.
Off - Turns the unit off.
On - Turns the unit on regardless of whether a signal is present or not.
Subwoofer crossover - This rotary control adjusts a variable low pass filter to set the upper
frequency at which the output of the subwoofer begins to roll-off. Continuously variable
from 50Hz, it matches the upper frequency characteristics of the subwoofer to the low
frequency response of the main stereo speakers.
Line level input - These RCA phono jacks accept a line level full range signal from the
pre-amplifier output of a receiver or pre-amplifier. This full range signal processed and
amplified to power the subwoofer.
Speaker level input - These spring loaded terminals for speaker wire accept a stereo,
speaker level, full range signal from a receiver or power amplifier. This signal is processed
and amplified to power the subwoofer.
Fuse - For continued protection replace fuse with same type and size listed.
Level control - This rotary control adjusts the level of the subwoofer and is used to balance
its volume with that of the main stereo speakers.
Status LED - This light emitting diode shows the status of the subwoofer electronics. “Red”
indicates that the amplifier is plugged in and the power switch is on.
Congratulations
Explanation of Features and Controls
see (figure A)
Speaker Type:
Driver:
Amplifier Power Output:
Frequency Response:
Lowpass Crossover:
Functions:
Optional Vertical Stand:
Inputs:
Dimensions:
Unit Weight:
Warranty:
8” High Performance Low Profile Powered Subwoofer
8” Reinforced
100 Watts (RMS)
50Hz - 250 Hz
Adjustable from 50Hz - 250 Hz
Power (On, Off)
Included
Hi Level (Speaker), Line (RCA)
4 11/16” H x 24 3/4” W x 15 3/4” D
20 lbs.
2 Years
Low Profile Subwoofer
1)
2)
3)
4)
5)
6)
7)
Vertical Placement
Horizontal Placement
WIRING AND CONNECTIONS
FR ONT
CENTER
SURR OUND
LEFT
REAR
RIGHT
REAR
CENTER
FR ONT
+
-
+-
+-
HI LEVEL IN
R
L
L
R
LINE IN
MIN MAX 50Hz 150Hz
POWER
ON
OFF
FUSE 1A/250V
Made In China
GAIN
FREQ
FROM AMPLIFIER
120 VAC
100 WATTS
60 HZ
LEFT
FR ONT
+ -
RIGHT
FR ONT
+ -
1A 250V
.
FR ONT
CENTER
SURR OUND
RIGHT
FR ONT
LEFT
FR ONT
LEFT
REAR
RIGHT
REAR
CENTER
FR ONT
+ -
+ -
+
-
+-
+-
OUTPUTS
SUB
HI LEVEL IN
R
L
L
R
LINE IN
MIN MAX 50Hz 150Hz
POWER
ON
OFF
FUSE 1A/250V
Made In China
GAIN
FREQ
FROM AMPLIFIER
120 VAC
100 WATTS
60 HZ
1A 250V
Figure B
Figure C
Your new subwoofer will work well in a variety of locations. However, placement in your listening room will affect is performance. Since the wavelengths of sound
reproduced by your subwoofer are large compared to its size, those sounds are omni-directional in nature. This means that locating your subwoofer in relation to
your left and right main speakers will not affect the directional cues which they provide. Because the sound you hear is combination of direct sound from the
speaker and reflected sound from the wall, ceiling and floor of your listening room, placement of the subwoofer in relation to room boundaries changes the
balance of what you hear at low frequencies. In that low frequency range, the dimensions of most rooms are comparable to the wavelengths of those sounds. As
sound propagates and reflects in the room, “standing waves” are created at frequencies where the wave length of sound or multiples of the wave length are
equal to one of the dimensions of the room. At your listening position, these standing wave patterns of reflected sound add together in and out of phase causing
large variations in the response that you hear. As a general rule, locating your subwoofer near the corner of the room will increase its overall output, but will excite
more standing waves in the room and may result in a more uneven response. Locating your subwoofer along a wall will usually mean less acoustic output but
a somewhat smoother response. A middle of the room location would suggest the smoothest response with the least output capability. Of course, any location
will be a compromise between acoustic performance and the aesthetic blend of the subwoofer enclosure with the decor and furnishings of your room. Don’t be
afraid to experiment with the location of your subwoofer in your room for the best results at your listening position. As with any other listening test, use program
material that you are familiar with that has substantial bass content.
After you have selected an initial location for your subwoofer and have connected it into your system, have a seat in your normal listening position and have
someone help you with the following adjustments:
A) If you are using the line level inputs and your main speakers are receiving a full range signal, set the subwoofer crossover frequency control to its full
counterclockwise position of 50Hz
B) Set the gain control to the full counterclockwise position at “minimum”.
C) Turn off the loudness control and set the bass tone control on your main amplifier to the flat position.
D) Use familiar program material that has substantial bass content and play your main system at a moderate volume level.
E) Slowly rotate the subwoofer level control clockwise until a good balance is achieved between the low frequency output of your subwoofer and the mid bass
and upper frequencies from your main speakers.
F) Slowly rotate the subwoofer crossover frequency control clockwise to attain the best blend between the level of the subwoofer and the main speakers in the
midbass crossover region. Advancing the control too far will cause a “boominess” in the overall sound and will add an unnatural “chesty” quality to male voices.
Turn off all power to your subwoofer and other equipment
before making any connections. Installation using speaker
level inputs.
See (Figure B).
Installation with A/V amplifiers and receivers that have
5.1 channel line level output.
See (Figure C).
Use and RCA “Y” adaptor to connect both line level
inputs
Placement or Positionng
Set-up and Adjustment
F-SUB8
User Manual
