Crown Audio specifications Specifications, Features, Installing the TP-170V

CONSTANT-VOLTAGE TRANSFORMER PANEL

TP-170V

he Crown® TP-170V is a rack-mountable Tpanel with autoformers to provide imped- ance 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.

The TP-170V is constructed of sturdy steel, and hinged on one side to allow easy access to the inside connections.

For more details about the Crown TP-170V, 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: One five-pole terminal strip per channel with touch-proof cover. Accepts up to 10 AWG terminal forks.

Frequency Response: +/- 0.5 dB (20 Hz to 20 kHz).

Insertion (Core) Loss: 0.41 dB max (70VAC at

50 Hz).

Dimensions:

19 in (48.3 cm) wide (including hinge)

7.23in (18.4 cm) high

1.45in (3.7 cm) deep.

Weight: 12.75 lbs (5.78 kg).

Features

• Four autoformers per panel provide four channels of impedance matching for Constant-Voltage opera- tion

•Provides 100V output in Dual mode when used with CTs 600, CTs 1200, CTs 4200 and CTs 8200 ampli- fiers

•Allows amplifiers without direct Constant-Voltage capability to be easily integrated into distributed systems

•Convenient hinged rack mounting allows easy access to connections

Installing the TP-170V

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 com- pletely down (counterclockwise).

Use a standard 19-inch (48.3-cm) equipment rack (EIA RS-310B) to install the TP-170V.

Connect the Grounding Strap

Connect the TP-170V grounding strap to a rack rail or rack ground, and be sure the rack is grounded to an AC mains safety ground. (Test the AC mains ground to make sure it is reli- able). If you are not using a rack, be sure to connect the TP-170V grounding strap to an AC mains safety ground and mount the unit in a metal box for safety. Insulate the TP-170V from the box.

CAUTION: Do not remove the grounding strap or leave it unconnected.

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 terminal forks or bare wire for your output connectors. The TP-170V terminal strips accept up to 10 AWG terminal forks which fit over a #8 screw.

CAUTION: Use insulated terminal forks to pre- vent shorting against the touch-proof cover plate.

To connect TP-170V outputs, first remove the touch-proof cover plate covering the output terminal strip by removing the three screws which hold it in place. To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable and connectors. Reinstall the cover plate.

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 amplifier 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.

CAUTION: Never use shielded cable for output wiring.