Lowell PA250 - Manual (Page 4)

4
REMOVABLE
PHOENIX
CONNECTOR
Instruction Sheet
IS-PA250
Issued: 5-1-14
Lowell Manufacturing Company 100 Integram Drive Pacific, Missouri 63069 U.S.A.
Call: 800-325-9660 Fax: 636-257-6606 Click: www.lowellmfg.com
Amplifier Installation and Connection
This unit was carefully checked and packed before leaving the factory. However, it is always a good idea to inspect
the shipping container and unit for indications of improper handling. If the unit has been damaged, make an
immediate claim to the dealer or distributor from whom it was purchased. If the unit was shipped to you, notify the
transportation company without delay, saving all packing materials, in order to process the claim.
INSPECTION
Before installing the amplifier, continue the inspection by running a quick performance check. Connect an 8
W test
speaker to the 8
W direct output terminals and a tuner, tape deck, or CD player to one of the aux inputs and set the
controls for operation. CAUTION: TO PROTECT THE SPEAKER FROM DAMAGE, DO NOT TURN THE UNIT ON
UNTIL ALL CONNECTIONS HAVE BEEN MADE. IN ADDITION, MAKE SURE THE UNIT IS GROUNDED
BEFORE TESTING. In this way you can check the basic operation of the amplifier before actually installing the unit
and making all of the final terminations required for the permanent installation. If shipping damage has resulted in
the amplifier being inoperable out of the box, call Lowell Customer Service to arrange for a replacement.
INITIAL PERFORMANCE CHECK
GENERAL WIRING AND INSTALLATION GUIDELINES
DO NOT run microphone cables near AC power wires, data cables, telephone cables, or speaker wiring to avoid
picking up extraneous signals in the sound system.
DO NOT run speaker output cables near data cables, telephone cables, or other low voltage wiring that could pick
up the signal from the higher level speaker cables.
DO NOT run high impedance unbalanced wiring more than 20' to avoid picking up noise and affecting the frequency
response of the sound system.
DO use shielded cable for all microphone and line level cables (except the balanced 600 ohm input line from a
telephone system may be twisted pair cable).
DO make sure that all speakers are wired in phase with each other.
DO make sure there are no short circuits on the loudspeaker lines before connecting them to the amplifier output.
PA250 Rear Panel
8
6 10 11 12 13 14 7
9
1 Master Volume Control
2 Amplifier Circuit Breaker
3 Main Power Switch
4 LED Peak Indicator (Red)
5 LED Power On Indicator (Green)
25V/70V Speaker Output 9
Switch “ON” for 25V/70V Output 10
6 Power Cord
Un-switched Convenience Outlet 7
8
W Speaker Output 8 TEL-PAGE & 600
W Gain Control 12
TEL-PAGE Input 13
600
W Input 14
Parallel Hi-Z Aux Input Jacks 11
PA250 Front Panel
1 2 3
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