Standard Horizon MLS-310 User manual

MLS-310
External Speaker with 10 Watt Amplifier
The MLS-310 high quality waterproof amplified communications speaker designed to operate with Marine VHF’s with maximum
of 4 watts output power. The MLS-310 amplifies the audio from the marine VHF to 10W providing loud and clear audio. The
volume control on the front of the speaker allows the audio level to be adjusted or to be turned off. Supplied with 6.5 feet of
speaker wire for connection of a Marine VHF, 6.5 feet of power cable to connect to 12VDC, bracket and flush mounting hardware.
INSTALLATION
1)MOUNTING BRACKET INSTALLATION
1. Remove the MLS-310 from the bracket by removing the
two Mounting Bracket Knobs.
2. Choose a place to mount the MLS-310.
3. Use the bracket as a template to mark the locations of the
mounting holes.
4. Use a 5.2-mm (17/64”) bit to drill the holes, and secure
the bracket with the supplied screws, spring washers, flat
washers, and nuts (Figure 1 & 2).
5. Insert the MLS-310 into the bracket with the Mounting
Bracket Knobs which were removed in step 1.
6. Set the MLS-310 to the preferred angle, then tighten the
Mounting Bracket Knobs to fasten the MLS-310 to the
bracket.
7. Route and secure the connection cable from the MLS-310
to the Marine VHF. Connect the WHITE wire of the con-
nection cable to the marine VHF’s positive (+) external
speaker output and the shield of the connection cable to
the negative (–) external speaker connection.
8. Connect the RED wire of the connection cable from the
MLS-310 to a Positive (+) 12VDC positive source (ca-
pable of supplying 1.5A of current) and the BLACK wire
of the connection cable to Negative (–) 12VDC source.
5 φ
TEMPLATE for the MLS-310
Use this template to mark the location
where the round hole for the flush
mount is to be cut.
Figure 1 (Desktop Mount)
You may reverse
the position of the
bracket.
106 mm
95 φ
106 mm
Figure 2 (Wall Mount)
Fuse
White
Sheild
Sheild
Red
Red
PowerSource
Black
Black
MLS-
3
1
0
E
x
t
e
r
n
a
l
S
p
e
a
k
e
r
Fuse White
Sheild
Sheild
Red
Red
Power Source
Black
Black
CMP25 RAM+ MIC
MLS-310 External Speaker
Typical Radio Connections Phantom Series Connections

2)FLUSH MOUNT INSTALLATION
1. Remove the MLS-310 from the bracket by removing the
two Mounting Bracket Knobs, then remove the rear case
of the MLS-310 from the main body by removing the four
screws (Figure 3.).
2. Assemble the supplied M4x50 Screw, Nut, and Washer as
the Figure 4.
3. Use the supplied template to mark the location where the
round hole is to be cut. Confirm the space behind the dash
or panel is deep enough to accommodate the MLS-310
(at least 4.3 inch (110 mm) deep). There should be at least
1 inch (2.5 cm) between the MLS-310’s heatsink.
4. Cut out the round hole (one large hole and four small
mounting holes) and inset the MLS-310 from the front
side.
5. Referring to Figure 5, pass through the four M4x50 Screws
(with Nut and Washer) into the mounting holes on the panel
from the back side and turn the M4x50 Screws five times.
6. Turn the four Nuts to adjust the tension so that the MLS-
310 is tight against the mounting surface.
7. Route and secure the connection cable from the MLS-310
to the Marine VHF. Connect the WHITE wire of the con-
nection cable to the marine VHF’s positive (+) external
speaker output and the shield of the connection cable to
the negative (–) external speaker connection.
8. Connect the RED wire of the connection cable from the
MLS-310 to a Positive (+) 12VDC positive source (ca-
pable of supplying 1.5A of current) and the BLACK wire
of the connection cable to Negative (–) 12VDC source.
OPERATION
1. Before connecting the MLS-310 to the radio, turn on the
radio and set the AF VOL level to minimum.
2. Turn the radio off then connect the MLS-310 to the radio.
3. Rotate the MLS-310 volume knob to “12 o’clock” posi-
tion.
4. Turn the radio on and adjust the VOL knob on the radio to
a comfortable listing level
5. After adjusting the volume on the radio, you may adjust
the MLS-310 volume or turn off the speaker using the
volume knob.
REPLACEMENT PARTS
Mounting Bracket (Black): RA0636400
Mounting Bracket (White): RA0636500
Mounting bracket Knobs (Black): RA045910A
Mounting bracket Knobs (White): RA043770A
Volume knob (Black): RA0652800
Volume knob (White): RA0635600
Mounting bracket mounting hardware: U9900147
Figure 3
Figure 5
Figure 4
Wall thickness + 1 inch
Washer Nut
M4x50 Screw
SPECIFICATIONS
Supply Voltage: 13.8 VDC ±15 %
Current Drain: 1.5 A @13.8 VDC,
VOL Knob MAX,
Audio Input Level: 700mVrms
Audio Input Level: 700mVrms (Nominal)
1Vrms (Maximum)
Input Impedance: 1.8 kΩ(Approx.)
Speaker Impedance:8Ω
Audio Output: 8 W @13.8 VDC, 10% THD
Audio Input Level: 700mVrms
Maximum Audio Output: 10 W @13.8 VDC,
Audio Input Level: 700mVrms
Operating Temperature: –4 °F to +140 °F
(–20 °C to +60 °C)
Connection Cable Length: 6.5 feet (2 m)