FIGURE 1
VERTICAL
MOUNT
INSTALLATION SHEET FOR
0S50TB AND OS50TW
50 WATT INDOOR/OUTDOOR SPEAKERS
FIGURE 2
Instruction Sheet:
IS-OS50 REV C
P/N 15221
Page 1 of 1
Printed 1-21-08
Lowell Manufacturing Company
100 Integram Drive
Pacific, Missouri 63069 U.S.A.
Call: 800-325-9660 Fax: 636-257-6606 Click: www.lowellmfg.com
HORIZONTAL
MOUNT
FIGURE 3
FIGURE 4
FIGURE 5
FIGURE 6
FIGURE 7 FIGURE 8
OS50T TRANSFORMER TAP SETTINGS
TAP
A
B
C
D
25V LINE
70V LINE
1.9W
100V LINE
.94W
.47W
.23W
15W
7.5W
3.8W
1.9W
15W
DO NOT USE
7.5W
3.8W
ELECTRICAL SPECIFICATIONS
Power rating: 50W RMS (RS426B test procedure)
Frequency response: 104Hz-17.3kHz + 6dB
Sensitivity: Log average 85.2dB
Woofer: 5.25" polypropylene coated with rubber surround
Impedance: 8 ohms
Speaker Mounting:
The OS50TW (white) and OS50TB (black) speakers may be mounted indoors
or outdoors (when protected from direct moisture). The included aluminum U-
bracket has mounting slots that line up with a properly secured metal single
gang outlet box, whether mounted vertically as shown in Figure 1, or
horizontally as shown in Figure 2. If more flexible aiming is required, OS50T
speakers may also be mounted using the optional Lowell OS-BRKT brackets
(See Figure 6) or Omnimount 20.5 Series brackets (See Figure 7). (Purchase
directly from Omnimount). Three (3) 1/4-20 threaded insert points are provided
on the rear of the OS50T speakers for these brackets (See Figure 3). A
speaker transformer select switch is provided on the rear of the OS50T
speakers (See Figure 3). With this switch in the 8 ohm position, the
transformer is disconnected internally and the speaker power rating is 50W.
With this switch in the A-D positions, the speaker power is determined by the
driving voltage as shown on the table on the rear of the OS50T speakers and
as shown on the table below. Incoming wiring should enter through the
weather-resistant terminal cover (See Figure 8). The rubber grommet may be
removed to accommodate larger wiring. Be sure to push the terminal cover on
until it snaps to assure a tight seal. Wiring is to be connected to the 4-
conductor removable phoenix type connector (See Figure 4 and Figure 5).
Parallel dual "+" and "-" terminals are provided in order to terminate incoming
and outgoing wiring. Lowell Manufacturing Company recommends that a
safety cable always be used when speakers are installed over-head. It is the
responsibility of the installer to consult a Licensed Structural Engineer to verify
the structural integrity and safety of any mounting method before installation.
SPEAKER
BRACKET
THREADED
MOUNTING
POINTS
WEATHER-RESISTANT
TERMINAL
COVER WITH
REMOVABLE GROMMET
4
CONDUCTOR
IN/OUT
CONNECTIONS
REMOVABLE
PHOENIX
CONNECTOR
SELECTOR
SWITCH
LOWELL OS-BRKT-B (OR -W)
OMNIMOUNT
20.5
SERIES
R
Phoenix type connector: maximum 14 AWG stranded wire
R
Tweeter: 1/2" PEI
(1 pages)
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