7.
Fuse:
Remove the fuse from the amplifier before making or breaking any
connections in your installation. If you need to replace the fuse, use only a fuse
of the same style and amperage rating as that shipped with the amplifier (see
chart below). If the fuse blows, it is telling you there is something wrong. Please
listen. The
LP100Z
©
uses an
ATC 20
amp fuse.
8.
Status indicators:
The
green LED
indicates the amplifier power supply is
working. If the
green LED is flashing
, it is an indication that the
+12V
connection is dipping below 10.5V dc, or that the speaker load is too low. The
yellow LED
indicates the amplifier has shut down due to overheating. When the
amplifier has reached the correct operational temperature, it will turn itself back
on. The
red LED
indicates the amplifier has shut down due to too much current
through the output stage. This excessive current can be caused by speaker
shorts, too low of speaker loads, incorrect transformer configuration, or incorrect
input level setting. The
REM
signal must be shut off and turned back on before
the current protect will reset and allow the amplifier to operate.
9.
Crossover:
The
LP100Z
©
amplifier has a built in programmable crossover
filter. You may select the high-pass, low-pass or bypass modes thru a switch on
the bottom of the amplifier located near the speaker connections. Remove the
black cap plug to gain access to the switch. If you select high-pass mode the
amplifier will play all frequencies from 80 Hz and up. If you select low-pass mode
the amplifier will play all frequencies from 80 Hz and down. All amplifiers are
shipped in the bypass mode that disconnects both the input and output of the
crossover filter from the audio path. You can change the cutoff frequency from
80 Hz by purchasing optional frequency selector chips and installing them in the
place of the 80 Hz chips. Frequencies available are 60 Hz, 70 Hz, 105 Hz, 160
Hz, 210 Hz, 285 Hz, and 340 Hz. The optional chips are available from your
dealer.
10.
EQUALIZATION CONTROLS
(
Z MODELS
ONLY): These controls offer
control over the bass and treble frequency ranges to adjust the musical sound to
the tastes of the user, or to overcome problems with environment or speaker
placement. The bass control is centered at
50 Hz
with a tight “
Q
”. The treble
control is centered at
10 KHz
with a wider “
Q
”. The Equalization controls are
accessed through the front panel of the amplifier; this is the same side and panel
that house the
LED
status indicators.
MOUNTING
1. The amplifier will work best if it is kept as cool as possible. Mount the amp in a
position that will allow air to flow freely through the fins. Hot air rises, so orienting
the amp with the connectors facing the ground and the status indicators facing
the sky is the ideal mounting position. The amplifier should not be mounted
upside down. Be sure there is ample space above the amplifier to avoid trapping
heated air against the heat sink.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER
™
is a trademark of Linear Power, Inc.
3
