Kramer 901 Manuale utente

KRAMER ELECTRONICS LTD.

USER MANUAL

MODEL:

901

Personal Stereo Amplifier

P/N: 2900-006013 Rev 3

901 – Contents

Contents

1Introduction 1

2Getting Started 2

2.1 Achieving the Best Performance 2

2.2 Safety Instructions 3

2.3 Recycling Kramer Products 3

3Overview 4

3.1 Defining the 901 Personal Stereo Amplifier 4

4Connecting and Operating the 901 6

5Technical Specifications 8

Figures

Figure 1: 901 Personal Stereo Amplifier 4

Figure 2: Connecting the 901 Personal Stereo Amplifier 7

901 - 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 video, audio, presentation, and broadcasting professionals

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 11 groups that are clearly defined

by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;

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.

Congratulations on purchasing your Kramer 901 Personal Stereo Amplifier, which

is ideal for the following typical applications:

Presentation rooms and multimedia applications for quick, local audio

amplification

Personal audio listening

901 - 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.kramerelectronics.com 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 901 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.

901 - Getting Started

2.2 Safety Instructions

Caution:

There are no operator serviceable parts inside the unit

Warning:

Use only the Kramer Electronics input power wall

adapter that is provided with the unit

Warning:

Disconnect the power and unplug the unit from the wall

before installing

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/.

901 - Overview

3 Overview

The 901 is a high−performance integrated personal stereo amplifier for

unbalanced stereo signals. It accepts a stereo audio signal and delivers a speaker

output of two watts RMS power per channel into a 4Ω load.

The 901 features:

Control knobs to adjust volume, bass, treble and balance

Selector switches to select the mic or line inputs and the type of microphone

(condenser or dynamic)

Outputs for a headphone set and for a pair of loudspeakers

3.1 Defining the 901 Personal Stereo Amplifier

This section defines the 901.

Figure 1: 901 Personal Stereo Amplifier

Feature

Function

Balance Control Knob

Adjusts the balance between the right and left

channels

Treble Control Knob

Controls the treble (high frequencies)

Bass Control Knob

Controls the bass (low frequencies)

Volume Control Knob

Controls the signal output level

ON LED

Illuminates when receiving power

901 - Overview

Feature

Function

Mic IN

Connects to the microphone

Type Cond/Dyn Selector Switch

Pushing in selects the dynamic microphone,

releasing selects the condenser microphone

Input Line/Mic Selector Switch

Pushing in selects the Mic input, releasing selects

the line input

Line IN (Right) RCA connector

Connects to the right stereo audio line level input

Line IN (Left) RCA connector

Connects to the left stereo audio line level input

Phones Out connector

Connects to the headphone set

SPKR Out (LGGR)Terminal Block

Connectors

Connect to the pair of loudspeakers

12V DC

+12V DC connector for powering the unit

901 - Connecting and Operating the 901

4 Connecting and Operating the 901

Always switch off the power to each device before connecting it to your

901. After connecting your 901, connect its power and then switch on

the power to each device.

To connect the 901 as illustrated in the example in Figure 2:

1. Connect one or both of the following inputs:

A stereo audio source (for example, a DVD Player) to the Left and

Right Line IN connectors; and /or

A microphone to the Mic IN input

2. Connect one or both of the following outputs:

Signals from both outputs (the headphones and the pair of loudspeakers) flow

simultaneously. When the 901 is functioning, connecting a headphone set to the

Phones Out connector will not automatically disconnect the pair of loudspeakers.

A pair of loudspeakers to the SPKR Out connector, by connecting the

left loudspeaker to the “L” (left) terminal block connector and to the

adjacent “G” (Ground) terminal block connector. Connect the right

loudspeaker to the “R” (right) terminal block connector and to the

adjacent “G” (Ground) terminal block connector; and /or

A headphone set to the Phones Out connector

3. Connect the 12V DC power adapter to the power socket and connect the

adapter to the mains electricity.

To operate your 901, as Figure 2 illustrates:

1. Choose the active audio source (either the stereo audio source or the mic)

via the Input Line/Mic selector switch.

Push in the Input Line/Mic selector switch to choose the Mic IN input.

When choosing a microphone, choose a dynamic microphone or

condenser via the Type Cond/Dyn selector switch

Push in the Type Cond/Dyn selector switch to choose the Dynamic microphone

input. Release the Type Cond/Dyn selector switch to choose the Condenser

input.

901 - Connecting and Operating the 901

Release the Input Line/Mic selector switch to choose the Line IN input

2. Adjust the volume, bass, treble and balance controls as required.

Figure 2: Connecting the 901 Personal Stereo Amplifier

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