Table of Contents
Advertisement
Quick Links
300 Watt Central Amplifier
Confidentiality Notice .................................................................................................................. 1
General Information .................................................................................................................... 1
Product Overview .................................................................................................................................1
System Requirements and Limitations................................................................................................1
Features and Functions ........................................................................................................................1
Important Safety Instructions..............................................................................................................2
Description of Major Components ......................................................................................................3
Internal Components ......................................................................................................................................... 3
External Components ........................................................................................................................................ 4
Block Diagram ......................................................................................................................................5
Speakers ................................................................................................................................................5
Speaker Wiring Guidelines................................................................................................................................ 6
Installation ................................................................................................................................... 6
Speaker Out Connection ......................................................................................................................8
Bridging of Amplifier Speaker Output Connection ...........................................................................9
Operation.................................................................................................................................... 10
Maintenance............................................................................................................................... 11
External and Internal Adjustment ....................................................................................................11
Troubleshooting ..................................................................................................................................11
Specifications ............................................................................................................................. 12
Replacement Parts ..............................................................................................................................13
GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA
610-777-1374 n 800-492-1212 n Fax: 610-775-6540
G A I - T R O N I C S C O R P O R A T I O N
Model PMA-300
T
C
A B L E O F
O N T E N T S
Pub.: 42004-667L2A
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for GAI-Tronics PMA-300
Summary of Contents for GAI-Tronics PMA-300
-
Page 1: Table Of Contents
Speaker Out Connection ........................8 Bridging of Amplifier Speaker Output Connection ................9 Operation............................ 10 Maintenance..........................11 External and Internal Adjustment ....................11 Troubleshooting ..........................11 Specifications ..........................12 Replacement Parts ..........................13 GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA 610-777-1374 n 800-492-1212 n Fax: 610-775-6540... -
Page 2: Confidentiality Notice
GAI-Tronics retains all intellectual property and other rights in or to the information contained herein, and such information may only be used in connection with the operation of your GAI-Tronics product or system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third party. -
Page 3: Important Safety Instructions
2 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Important Safety Instructions WARNING When using this product, these basic safety precautions should always be followed to reduce the risk of fire, electrical shock, and/or injury to persons: 1. -
Page 4: Description Of Major Components
3 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Description of Major Components This assembly includes external components accessible to the user as well as internal components or subassemblies. Internal Components The assembly contains the following components or subassemblies. Please refer to Figure 2 below for a top view with the cover removed. -
Page 5: External Components
Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A External Components The Model PMA-300 Power Amplifier’s front panel includes the following components. Refer to Figure 3 below. • POWER: This rocker switch controls the main ac power to the amplifier. -
Page 6: Block Diagram
Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Block Diagram The block diagram for the PMA-300 Amplifier is shown below: Figure 5. PMA-300 Block Diagram Speakers The individual speaker’s power level is determined by the tap settings on the proper V-matched line matching transformer. -
Page 7: Speaker Wiring Guidelines
6 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Speaker Wiring Guidelines Cable distance should be kept as short as possible to reduce power loss. The following chart illustrates the correlation between four typical wire sizes and the distance that speakers with integral drivers or horns with separate drivers can be placed from the central amplifier for a -1 dB loss (-20% power). - Page 8 7 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Ventilation The amplifier creates heat during operation. Although the amount of heat generated varies depending on various factors, the unit should be positioned to allow for natural convection air flow to prevent excessive temperature rise.
-
Page 9: Speaker Out Connection
8 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Speaker Out Connection The amplifier’s SPEAKER OUT connection uses a keyed, positive-locking Neutrik® SPEAKON connector, which eliminates the possibility of vibrating loose. The ‘keyed’ feature prevents misconnection to similar style connectors on the amplifier’s rear panel. The amplifier contains a 70V out and a 100V out connection depending on your constant voltage speaker system. -
Page 10: Bridging Of Amplifier Speaker Output Connection
SPEAKER OUT voltage selection, either 70.7V or 100V connection. Refer to Figure 7 for more details. Contact GAI-Tronics’ Field Service Department at 800-492-1212 inside the USA or 610-777-1374 outside the USA for further information and assistance. -
Page 11: Operation
Pub.: 42004-667L2A Operation This section describes the simple operation of the Model PMA-300 Power Amplifier. 1. Push the front panel main ac POWER rocker switch to the “ON” position. 2. With no unit adjustments required, apply the appropriate audio signal applied to LINE IN. -
Page 12: Maintenance
11 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Maintenance External and Internal Adjustment There are no external or internal user-adjustments required. Troubleshooting Problem Possible Cause Possible Solution No front panel Power ON No ac power present. -
Page 13: Specifications
LED bar graph. AC Primary fuse: (accessible externally from inside of rear panel’s IEC power connection) Model PMA-300 (208 V ac):............. T6.3A, Time-lag Slo Blo (5 x 20 mm) Internal Fuses: Low Voltage Power Supply:............. F3 T1A, Time-lag Slo Blo (5 x 20 mm) Audio Output Stage:............... -
Page 14: Replacement Parts
13 of 13 Page Model PMA-300 300 Watt Central Amplifier Pub.: 42004-667L2A Front panel: ......................5/32 inch thick aluminum Overall Unit Dimensions:....5.2 H x 17.125 W x 14 D inches (132 mm x 435 mm x 356 mm) (Designed for mounting in standard 19-inch equipment rack) (3U standard 19-inch rack) Front Panel Dimensions: ............
Need help?
Do you have a question about the PMA-300 and is the answer not in the manual?
Questions and answers