USL UPC-2 - Manual (Page 6)

UPC-1/UPC-2 Installation Manual 6 January, 1999
➤ CONNECT THE AUDIO INPUT LINE
Connect the Center channel speaker terminals to the + and – (ground) audio input
terminals on the IRC-20 as in Fig. C. If the center channel is bi-amped, you must con-
struct a resistor network, as in Fig. D, that sums the high and low frequency signals, then
feed the output of the network to the IRC-20 audio input. You also may connect the
IRC-20 to the output of a monitor or a processor.
WOOFER
HIGH
FREQUENCY
HORN
100k Ω
50k Ω
+
+
TO IRC-20
+TERMINAL
➤ CONNECT THE PROVIDED IRP-20 AC POWER PACK
+ – AC
PANEL
#1
PANEL
#2
AC
50
%
CLIP
INPUT
LEVEL
ADJUST
POWER
Processor Center Channel
OR
Center Channel Speaker
+ E
®
INFRARED HEADPHONE TRANSMISSION SYSTEM
MODEL IRC-20 EMITTER/MODULATOR SYSTEM
IRM-20 MODULATOR ULTRA ★ STEREO LABS, INC. • Tarzana, California
®
AC Gnd AC
Connect ground wire to
IRM-20 Chassis (May be
required by local
building code).
AC Power Pack
Fig. C – Connecting the audio input and 24 V AC power pack to the
UPC-1 system
Fig. D
Summing resistor network for
use with bi-amped center
channel speakers
FOR THE UPC-1
(See Figure C)
Connect the provided
IRP-20 AC Power Pack
to the IRC-20 AC Panel
#1 terminals using
standard 18-gauge or
greater zip cord. (See
Table 1 for lengths.)
Make sure there are no
loose wire strands that
could touch any
nearby metal and short
the Power Pack.
DO NOT SHORT THE
POWER SUPPLY.
Connect the Power
Pack to a 115 V AC 50/
60 Hz outlet.
TABLE 1
Maximum lengths
and gauge sizes for
connector cord from
IRP-20 AC Power
Pack to the IRC-20
AC Panel #1 termi-
nals.
60' @ 18 ga.
100' @ 16 ga.
150' @ 14 ga.
200' @ 12 ga.