Ada SSD-66, Manual, Page: 19 / 139

19
If you are locating the external power amplifier a considerable distance from the Delta-88,
follow the line-level suggestions on the previous page.
Stereo Speaker Jacks on the RAM-50
Each RAM-50 Room Integrated
Amp Module incorporates two banana
jack speaker connectors, one for the
right channel and the second for the left
channel. Please use the banana jacks
that are provided with the Delta-88.
The banana jacks have a small tab on
one of the polls marked GND for
ground. If you wire your speaker cable using the polarity tab as a
ground mark, connection to the Delta-88, even when you cannot
completely see the rear panel, is made significantly easier. Again,
make certain that the bannana jacks connect vertically to both the plus
and minus speaker outputs.
Each RAM-50 is stable down to 4
Ω
which means it can accept a speaker load of two pair of 8
Ω
speakers or one pair of 4
Ω
speakers. Any load lower than 4
Ω
will eventually damage the RAM-
50 Amplifier Module. If you are connecting two pair of 8
Ω
speakers, you can use a second set
of banana jacks to piggyback off of the first set connected to the Delta-88.
Bass Audio Input & Speaker Jacks (Only When Using the RBM-50 Bass Amp Module)
The RBM-50 is designed specifically to drive passive subwoofers with 100 Watts of
power. The subs are receiving a mono
audio signal derived from one of the
other zone amp cards (RAM-50s) on
the same Delta-88. The RBM-50 must
receive a variable line-level audio sig-
nal from the corresponding RAM-50
for that room so that the bass amp
raises and lowers its output along with
the room's other speakers. There are additional settings
in software that permit the bass amps output level to be
set to an initial level. This will be discussed in upcoming
sections of this manual.
Once you have connected a stereo line-level RCA wire from the corresponding RAM-50's
variable line-level output to the RBM-50's loop right & left (it does not matter whether you use
the upper or lower RCA jacks), you can connect the subwoofer's speaker wire to the RBM-50
using the bannana jacks that are provided. Since you can load the RBM-50 down to 4
Ω
, you
can connect two 8
Ω
subs to the RBM-50. Again, you can piggyback the second sub on top of
the first subs banana jack.
Delta-88 Connections (cont.)
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
1
2
3
4
5
6
7
8
AUDIO
INPUTS
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
43
2
1
2
1
ADA BUS™
MUTE L.V.
ZONE L.V.
OUT
AC INPUT
AC
LOOP OUT
TO DELTA-88
1 2
1 2
3 4
3 4
5 6
5 6
7 8
7
8
VSM-8
VIDEO SWITCHER
V
I
D
E
O
I
N
P
U
T
V
I
D
E
O
O
U
T
P
U
T
LOOP
L
SUB
L R
+
-
R
BRIDGED
RBM-50
Right
Left
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
1
2
3
4
5
6
7
8
AUDIO
INPUTS
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
FIX
VAR
SPEAKER
L R
+
-
LINE
RAM-50
43
2
1
2
1
ADA BUS™
MUTE L.V.
ZONE L.V.
OUT
AC INPUT
AC
LOOP OUT
TO DELTA-88
1 2
1
2
3 4
3 4
5 6
5 6
7 8
7 8
VSM-8
VIDEO SWITCHER
V
I
D
E
O
I
N
P
U
T
V
I
D
E
O
O
U
T
P
U
T
LOOP
L
SUB
L R
+
-
R
BRIDGED
RBM-50
Sub