User Guide

Introduction
With the ~~ Marine MOSFET
amplifier series, we are introducing
two new amplifiers, designed
specifically for marine audio
installations. This new series includes
a 2-channel amplifier and a 4-channel
amplifier.
All
iiO~S Marine models feature both
highp;"S's and low pass crossovers.
For further flexibility
in the use of a
subwoofer. a variable bass
boost
control has been included. You can
control the subwoofer level with the
remote level control module.
These
!9~ Marine amplifiers are
constructed using a special corrosion
resistant coating on the printed circuit
board
to prevent damage from the
high humidity
of the marine
environment.
•
~ Marine understands that
amplifiers are placed
in many different
kinds
of installations, so we have also
Included
an Input sensitivity control to
help you integrate the amp into your
system regardless
of the nature of your
input source.
What is included?
When first unpacking your new
amplifier, please check first that the
package contains all
of the items
below. If something
is missing, contact
the store where you purchased the
player.
•
Marine amplifier
• HIgh input wire with connector
• Four (4) mounting screws
Features
Your new !9~1 Marine amplifier
features the following:
• Class
A-B operation
• Bridgeable outputs
• TriMode capable
• MOSFET PWM (Pulse Width
Modulated) Power Supply
• 2 Ohm stable stereo operation
with output power increase
• Thermal and speaker short
protection
• Soft turn-on cirCUit
•
Remote turn-on/turn-off circuit
• Variable input gain control
• Variable low and fixed high pass
crossovers
• Variable bass boost (0 to +18dB)
• Exclusive
protective coating on
PC board to provide damage from
humidity
• Gold plated RCA low level and
high level inputs
• LED power and protection
indicators
• Silver anodized heatsink
• Remote subwoofer level control
About 2 Ohm operation
Your'30~S Marine amplifier has be€n
desig'n~70 operate efficiently at loads
down to 2 Ohms. This means that you
can install four 8 Ohm speakers per
channel,
when using parallel wiring.
Increasing the number of woofers per
channel at low frequencies (below
100t-fz) produces an acoustic coupling
effect. This acoustic coupling effect
increases your power output
by about
3dB per speaker. or the equivalent
of
an additional 10W per speaker.
When operating at 2 Ohms. the
amplifiers will increase their
outpul
power by approximately 50%. The
current
draw will also increase by
about the same amount, so be sure
you have enough current to run the
amplifiers into a 2 Ohm load.
If you lack adequate current, your
music reproduction will be distorted.
Mu ..... ne MOSFET ArnpllflOJ User's Manual - pagf:!' 3
Manno MOSFET Ampllnlll' U ..... s Manual - page 2