Kramer PA-150 User manual

KRAMER ELECTRONICS LTD.
PRELIMINARY
USER MANUAL
MODEL:
PA-150
70V/100V 50W Power Amplifier
P/N: 2900-300406 Rev 1

PA-150 –Contents
i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 2
2.3 Recycling Kramer Products 3
3Overview 4
4Defining the PA-150 50W Power Amplifier 5
5Connecting the PA-150 6
5.1 Connecting the PA-150 6
5.2 Wiring the Inputs 7
5.3 Connecting Speakers 9
5.4 Connecting the Remote Volume Control 10
6Operating the PA-150 11
6.1 Indicators 11
7Troubleshooting 12
8Technical Specifications 13
Figures
Figure 1: PA-150 50W Power Amplifier Rear Panel 5
Figure 2: Connecting the PA-150 50W Power Amplifier 6
Figure 3: Connecting a Balanced XLR Input 7
Figure 4: Connecting a Balanced 6.5mm Phone Jack 8
Figure 5: Connecting an unbalanced RCA Input 8
Figure 6: Connecting an unbalanced 6.5mm Phone Jack 8
Figure 7: Connecting One or Multiple Speakers to the PA-150 (100V) 9
Figure 8: Connecting One or Multiple Speakers to the PA-150 (70V) 10
Figure 9: Connecting the Remote Volume Control 10

PA-150 - Introduction
1
1 Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been
providing a world of unique, creative, and affordable solutions to the vast range of
problems that confront the video, audio, presentation, and broadcasting
professional on a daily basis. In recent years, we have redesigned and upgraded
most of our line, making the best even better!
Our 1,000-plus different models now appear in 14 groups that are clearly defined
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix
Switchers; GROUP 3: Control Systems; GROUP 4: Format/Standards Converters;
GROUP 5: Range Extenders and Repeaters; GROUP 6: Specialty AV Products;
GROUP 7: Scan Converters and Scalers; GROUP 8: Cables and Connectors;
GROUP 9: Room Connectivity; GROUP 10: Accessories and Rack Adapters and
GROUP 11: Sierra Products; GROUP 12: Digital Signage; and GROUP 13: Audio,
and GROUP 14: Collaboration.
Congratulations on purchasing your Kramer PA-150 50W Power Amplifier, which
is ideal for the following typical applications:
Boardrooms
Classrooms
Hospitality
Transportation
Retail
Entertainment
Houses of worship

2
PA-150 - Getting Started
2 Getting Started
We recommend that you:
Unpack the equipment carefully and save the original box and packaging
materials for possible future shipment
Review the contents of this user manual
Go to http://www.kramerav.com/downloads/PA-150 to check for up-to-date
user manuals, application programs, and to check if firmware upgrades are
available (where appropriate).
2.1 Achieving the Best Performance
To achieve the best performance:
Use only good quality connection cables (we recommend Kramer high-
performance, high-resolution cables) to avoid interference, deterioration in
signal quality due to poor matching, and elevated noise levels (often
associated with low quality cables)
Do not secure the cables in tight bundles or roll the slack into tight coils
Avoid interference from neighboring electrical appliances that may adversely
influence signal quality
Position your Kramer PA-150 away from moisture, excessive sunlight and
dust
This equipment is to be used only inside a building. It may only be
connected to other equipment that is installed inside a building.
2.2 Safety Instructions
Caution:
There are no operator serviceable parts inside the unit
Warning:
Use only the Kramer Electronics power supply that is
provided with the unit
Warning:
Disconnect the power and unplug the unit from the wall
before installing
i
!
!

PA-150 - Getting Started
3
2.3 Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
aims to reduce the amount of WEEE sent for disposal to landfill or incineration by
requiring it to be collected and recycled. To comply with the WEEE Directive,
Kramer Electronics has made arrangements with the European Advanced
Recycling Network (EARN) and will cover any costs of treatment, recycling and
recovery of waste Kramer Electronics branded equipment on arrival at the EARN
facility. For details of Kramer’s recycling arrangements in your particular country
go to our recycling pages at http://www.kramerelectronics.com/support/recycling/.

4
PA-150 - Overview
3 Overview
The Kramer PA-150 is a high−performance mono, audio power amplifier for
balanced signals that can output 50W of audio into 70V or 100V speaker systems.
The PA-150 50W Power Amplifier features:
Output power 50 W into one channel
70V or 100V amplification
Line-level, balanced input
Input level sensitivity adjustment
Remote volume and mute control

PA-150 - Defining the PA-150 50W Power Amplifier
5
4 Defining the PA-150 50W Power Amplifier
Figure 1: PA-150 50W Power Amplifier Rear Panel
#
Feature
Function
1
INPUT 3-pin Terminal
Block
Connect to the line-level, balanced, stereo audio source, (for
example, a media player), see Section 5.2.1
2
LEVEL Trimmer
Turn clockwise to increase the amplitude of the input signal; turn
anticlockwise to decrease the level
3
REMOTE 4-pin Terminal
Block
Connect to the remote, 10v volume control, (for example, the
W-LM) and mute-switch, (see Section 5.4)
4
ON LED
Lights blur when the device receives power
5
SIGNAL LED
Lights green when there is an input signal present
6
CLIP LED
Lights red when the signal clips on the output
7
POWER 2-pin Terminal
Block
Connect to the power supply provided, (see Section 5.4)
8
SPEAKER 3-pin Terminal
Block
Connect to either the 100V speaker chain or to the 70V speaker
chain, (see Section 5.3).
Note: Only one of the outputs can be used at a time

6
PA-150 - Connecting the PA-150
5 Connecting the PA-150
This chapter comprises the following sections:
Connecting the PA-150 (see Section 5.1)
Wiring the inputs (see Section 5.2)
Connecting speakers (see Section 5.3)
Connecting the Remote Volume Control (see Section 5.4)
5.1 Connecting the PA-150
Always switch off the power to each device before connecting it to your
PA-150. After connecting your PA-150, connect its power and then
switch on the power to each device.
Figure 2: Connecting the PA-150 50W Power Amplifier
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PA-150 - Connecting the PA-150
7
To connect the PA-150 as illustrated in the example in Figure 2:
1. Connect a balanced audio source, (for example, a PC) to the INPUT 3-pin
terminal block.
2. Connect the speaker(s) to the SPEAKER OUT 3-pin terminal block, (see
Section 5.3).
3. Connect a remote volume control, (for example, the W-LM) to the Remote
4-pin terminal block, (pins +V, LEVEL, and GND).
4. Connect a remote, momentary mute-switch to the Remote 4-pin terminal
block, (pins Mute and GND).
5. Connect the power adapter to the PA-150 and plug the power adapter into
the mains power supply.
5.2 Wiring the Inputs
Your PA-150 is provided with a 3-pin terminal block for its input connection. This
connector can accept either a balanced or an unbalanced signal however, some
modifications must be made for an unbalanced connection.
5.2.1 Wiring Balanced Inputs
When using a balanced input source and connector, you must ensure that the hot,
cold, and ground pins of the connector are matched up to the +, –, and ground
pins of the PA-150 terminal block connector respectively. The following diagrams
illustrate how to connect standard XLR and TRS connectors.
Figure 3: Connecting a Balanced XLR Input