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

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 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

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

PA-150 - Getting Started

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/.

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

4 Defining the PA-150 50W Power Amplifier

Figure 1: PA-150 50W Power Amplifier Rear Panel

Feature

Function

INPUT 3-pin Terminal

Block

Connect to the line-level, balanced, stereo audio source, (for

example, a media player), see Section 5.2.1

LEVEL Trimmer

Turn clockwise to increase the amplitude of the input signal; turn

anticlockwise to decrease the level

REMOTE 4-pin Terminal

Block

Connect to the remote, 10v volume control, (for example, the

W-LM) and mute-switch, (see Section 5.4)

ON LED

Lights blur when the device receives power

SIGNAL LED

Lights green when there is an input signal present

CLIP LED

Lights red when the signal clips on the output

POWER 2-pin Terminal

Block

Connect to the power supply provided, (see Section 5.4)

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

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

PA-150 - Connecting the PA-150

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

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