XFMR-4
XFMR-8
T
he Crown
®
XFMR-4 and XFMR-8 are
rack-mountable transformers to provide
impedance matching between amplifier
outputs and “constant voltage” loudspeakers.
This unit allows amplifiers without direct 70V
or 100V output capability to drive distributed
speaker systems designed to operate at those
voltages.
For more details about the Crown XFMR-4 and
XFMR-8, contact Crown Customer Service at
800-342-6939 or 574-294-8200. Also, visit the
Crown Audio website at www.crownaudio.com.
Specifications
Output connectors:
Pluggable barrier block
connectors that accepts up to 14 AWG wire.
Frequency Response:
+/– 1.0 dB (70 Hz to 15 kHz).
Insertion (Core) Loss:
1.0 dB max (70VAC).
Max Input Levels:
32 Vrms / 125W.
Dimensions:
19 in (48.3 cm) wide,
1.72 in (4.4 cm) high,
15.6 in (39.7 cm) deep.
Weight:
4CH: 17.0 lbs (7.7 kg)
8CH: 23.6 lbs (10.7 kg)
Installing the XFMR-4 and XFMR-8
CAUTION: Before you begin, make
sure your amplifier is disconnected
from the power source, with the
power switch in the “off” position
and all level controls turned completely down
(counterclockwise)
.
Use a standard 19-inch (48.3-cm) equipment
rack (EIA RS-310B) to install the XFMR-4 and
XFMR-8.
Choose Output Wire and Connectors
Crown recommends using professionally
constructed, high quality, two- or four-
conductor, heavy gauge speaker wire and
connectors. The XFMR box is fitted with
pluggable barrier block connectors that will
accept 14 AWG wire.
Wire Your System
Refer to the chart in Figure 1 to determine
the proper wiring of your constant-voltage
system.
CAUTION: Never use shielded cable for
output wiring.
CONSTANT-VOLTAGE TRANSFORMER PANEL
Features
s 4RANSFORMERSPROVIDEFOURANDEIGHT
channels of impedance matching for
Constant-Voltage operation
s 0ROVIDES6AND6OUTPUTWHEN
used only with Com-Tech DriveCore (CT
475, CT 875, CT 4150 and CT 8150)
s !LLOWSAMPLIlERSWITHOUTDIRECT
Constant-Voltage capability to be easily
integrated into distributed systems
s h*UMPERvCABLESAREPROVIDEDTOEASILY
incorporate the XFMR unit with a Com-
Tech DriveCore amplifier
