Input Level control (GAIN)
The input level control, 8V – 0,25 V,
matches the output of your radio to
the input of the amplifier. After instal-
lation is complete, make sure the in-
put of the amplifier is turned down all
the way ( counter-clockwise at 8V ).
The high pass filter blocks
very low frequencies
from reaching the speakers. It is mostly used at
say 60 Hz to protect small speakers ( like 6 inch
and smaller ) from deep bass. The HPF filter is
used in this way if
RM20
/
RM30
is used in stereo
mode.
High pass filter RM20, RM30
Low pass filter RM40
The low pass filter is
mostly used for
subwoofers. It will allow
low frequencies only and
blocks higher frequencies.
A typical setting is 50 –
70 Hz.
6
Play a CD, make sure all bass or treble settings or
equalizer are flat, and turn the volume of the radio
up until you just start to hear distortion. Turn the
volume control down just a bit. On the amplifier
increase the input level control ( clockwise or to the
right ) until you just start to hear distortion, then back
the level control just a bit. Now your radio and
amplifier levels are matched.
SUB EQ on RM10 & RM15
SUB EQ
is used to increase the bass
volume at a low frequency.You can
select the amplification between 0 dB (
no amplification ) and +6 dB ( full
amplification ) at
40 Hz center frequency
This function is used to compensate for
the bass box function and to adjust for
your own taste of bass. Set level control
at 0 dB if you want it to be inoperative.
The phase can be adjusted in either 0
or 180 degrees. This is used to get the
best possible ”front stage” from the
subwoofer.
PHASE switch on RM 10, RM15, RM30
Subsonic / high pass filter
on RM15
The
Subsonic filter
blocks
the very deepest
frequencies from reaching
the subwoofers. It can be
set from 15 to 150 Hz and
can be switched on / off.
A typical setting for
subwoofer use is 25-30
Hz
Set the switch to posi-
tion
HPF
to connect the
filter, or in postition
FULL
if you don’t want
to limit the frequency
range.
Set the switch in position LPF to activate the filter.
Set the filter switch in FULL position if you want to
run the amplifier in full range mode.
Features / crossovers
Low pass filter RM10, RM15, RM20, RM30
The low pass filter is
mostly used for
subwoofers. It will allow
low frequencies only and
blocks higher frequencies.
A typical setting is 50 –
70 Hz.
On
RM10/15
you can
also choose filter slope,
12 dB or 24 dB.
SUBSONIC
Off On
40 Hz
150 Hz
100 Hz
15 Hz
PHASE
0
180
o
If RM20
is used for
running a subwoofer in
bridge mode the filter can
be used to stop the lowest
frequencies from reaching
the subwoofer.It can be
adjusted from 15 to 500
Hz.
A typical setting for a
subwoofer is 25-30 Hz.
High pass filter RM40
The high pass filter blocks
very low frequencies
from reaching the speakers. It is mostly used at
say 60 Hz to protect small speakers ( like 6 inch
and smaller ) from deep bass.
FREQUENCY
X-OVER
50 Hz
500 Hz
FULL LPF
HPF
200 Hz
HPF
Off On
50 Hz
500 Hz
220 Hz
15 Hz
HPF
Off On
90 Hz
150 Hz
120 Hz
50 Hz
RM30
RM20
RM15
Hz
LPF
FULL 24 dB
12 dB
50
500
200
80
RM20
FREQUENCY
X-OVER
50 Hz
500 Hz
FULL LPF
HPF
200 Hz
70
120
90
50
Hz
LPF
RM30
SUB EQ
0 +6
dB
LPF
OFF ON
80
500
200
50
Hz
BASS EQ on RM20
BASS EQ
0 +6
dB
BASS EQ
is used to increase the bass
volume at a low frequency.You can
select the amplification between 0 dB (
no amplification ) and +6 dB ( full
amplification ) at
80 Hz center frequency.
This function is used to compensate for
the bass function on your front system
and adjust for your own taste of bass.
Set level control at 0 dB if you want it to
be inoperative.
GAIN
8V
0,25V
LPF
12 dB 24 dB
50
150
90
70
RM10
