18
Fixed Audio Line-Level Outputs
Each RAM-50 Room Integrated
Amp Module incorporates a fixed line-
level stereo audio output which can
be used to provide a fixed signal to
surround sound processors (SSD-66
or SSD-66THX). When connecting to
home theater systems, the RAM-50
for that zone acts as the input selector
while the decoder acts as the room's
preamplifier.
In certain cases, you may
be locating the surround
sound processor a signifi-
cant distance from the
Delta-88. When running
the fixed line-level audio
signal an extended distance or near high-voltage wires,
you may experience signal loss or ground loop hums
across the line-level signal. ADA provides two options to
improve audio levels or reduce/eliminate ground loop
hums. The first option includes the use of an ISO-2 Line
Level Isolation Amplifier which buffers the two channels
essentially providing each with its own ground. The
second option involves the use of ADA's XLRX-1 Unbal-
anced to Balanced Line Level Convertor and the XLRR-1
Balanced to Unbalanced Line Level Convertor. Place the
XLRX-1 on the transmitting end of the audio path and the
XLRR-1 on the receiving end of the
audio path. These devices will re-
quire a 2 conductor shielded wire run
for each channel.
Variable Audio Line-Level Outputs
Each RAM-50 Room Integrated
Amp Module incorporates a variable
line-level stereo audio output which
can be used to provide an audio sig-
nal to external power amplifiers (PF-
200 or PF-250). When connecting to
external power amplifiers, the RAM-
50 acts as both the input selector and
preamplifier while its own internal
amplifier is left unused.
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
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
ON
OFF
POWER
PF-200
FUSE
F U
S
E
FU
SE
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
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
L
R
L
R
SUB
WOOFER
CENTER
LEFT
RIGHT
115 V
VOLTAGE
SELECT
FUSE
AC POWER
1 2 3 4
1 2
12VDC
ACC-2
- +
ADA
BUS
OUTPUTS
REAR
FRONT
INPUT
LEVEL
MIN
MAX
SSD-66
SURROUND
SOUND
DECODER
L
R
XLRX-1
L
R
XLRR-1
L
R
L
R
OUTPUT
INPUT
ISO-2
12V AC
TRANS-
FORMER