T-170V
T
he Crown
®
T-170V is an autoformer that
provides impedance matching between an
amplifi er output and “constant voltage”
loudspeakers. It allows amplifi ers without direct
70V or 100V output capability to drive distrib-
uted speaker systems designed to operate at
those voltages.
For more details about the Crown T-170V, con-
tact Crown Customer Service at 800-342-6939
or 574-294-8200. Also, visit the Crown Audio
website at www.crownaudio.com.
Specifi cations
Wires:
Black: To amplifi er negative (–) output and
speaker negative (–) terminal.
Yellow: To amplifi er 40V positive (+) output.
Violet: To 70V speaker positive (+) terminal or
to amplifi er 70V positive (+) output for 100V
speaker applications.
Blue: To amplifi er 50V positive (+) output.
White: To 100V speaker positive (+) terminal.
Frequency Response:
+/- 0.5 dB (20 Hz to 20
kHz).
Insertion (Core) Loss:
0.41 dB max (70VAC @
50 Hz).
Dimensions:
4.10 in (10.4 cm) diameter
1.30 in (3.3 cm) deep.
Weight:
2.2 lbs (1 kg).
Accessories:
5 wire nuts included.
Installing the T-170V
CAUTION: Before you begin, make sure your
amplifi er is disconnected from the power
source, with the power switch in the “off”
position and all level controls turned com-
pletely down (counterclockwise).
Choose Output Wire and Connectors
Crown recommends using professionally con-
structed, high quality, two- or four-conductor,
heavy gauge speaker wire and connectors. You
may use #10 AWG terminal forks or bare wire
to connect to CTs amplifi er output connectors.
Wire Your System
Refer to the chart in Figure 1 to determine the
proper transformer tap to use, based on the
rated output power of your amplifi er and the
desired constant-voltage of your system. Then
wire the connections as shown in the corre-
sponding wiring diagram in Figs. 2 through 4.
CONSTANT-VOLTAGE TRANSFORMER
Figure 1. Voltage In / Voltage Out Chart
Features
• Autoformer provides impedance matching for Constant-Voltage operation
• Provides 100V output in Dual mode when used with CTs 600, CTs 1200, CTs 4200 and CTs 8200 ampli-
fi ers
• Allows amplifi ers without direct Constant-Voltage capability to be easily integrated into distributed
systems
CAUTION: Never use shielded cable for output
wiring.
The T-170V autoformer should be mounted
and enclosed in a rack or metal box for safety.
Put insulation between the autoformer and
the box.
Class 1 Output Wiring required.