Input Level Control; Crossovers, Etc - DLS Reference RM10 Owner's Manual

Features / crossovers
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 ).
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
is used to increase the bass
SUB EQ
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.
BASS EQ on RM20
is used to increase the bass
BASS EQ
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.
PHASE switch on RM 10, RM15, RM30
The phase can be adjusted in either 0
or 180 degrees. This is used to get the
best possible "front stage" from the
subwoofer.
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
6
GAIN
8V 0,25V
SUB EQ
0
+6
dB
BASS EQ
0 +6
dB
PHASE
0
o
180
SUBSONIC
40 Hz 100 Hz
Off On
15 Hz 150 Hz
High pass filter RM20, RM30
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.
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.
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.
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.
LPF
70 90
12 dB 24 dB
50 150
RM10
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.
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.
HPF
50 Hz 220 Hz
Off On
15 Hz 500 Hz
RM20
HPF
90 Hz 120 Hz
Off On
150 Hz
50 Hz
RM30
FREQUENCY
200 Hz
X-OVER
500 Hz
50 Hz
FULL LPF
HPF
LPF
200
80
FULL 24 dB
50 500
12 dB
Hz
RM15
LPF
200
80
OFF ON
50
500
Hz
RM20
LPF
90
70
50
RM30 120
Hz
FREQUENCY
200 Hz
X-OVER
500 Hz
50 Hz
FULL LPF
HPF