Kramer 905xl User manual

KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
905xl
Power Amplifier
P/N: 2900-300196 Rev 3

905xl - 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 905xl Power Amplifier 5
5Installing in a Rack 6
6Connecting the 905xl Power Amplifier 7
6.1 Connecting to the 905xl via RS-232 8
7Operating the 905xl Power Amplifier 9
7.1 Using the Front Panel Buttons 9
7.2 Using the Audio Control Program 9
7.3 Upgrading the Firmware 11
8Technical Specifications 12
9Default Communication Parameters 13
10 Protocol 3000 14
10.1 Kramer Protocol 3000 Syntax 14
10.2 Kramer Protocol 3000 Commands 16
Figures
Figure 1: 905xl Power Amplifier Front and Rear Panels 5
Figure 2: Connecting the 905xl Power Amplifier 7
Figure 3: Audio Control Window 10

905xl - 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 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 Video Products.
Congratulations on purchasing your Kramer 905xl Power Amplifier, which is ideal
for the following typical applications:
•Presentation rooms and multimedia applications for quick, local audio
amplification
•Personal audio listening (for example, a PC and portable CD player)

2 905xl - 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 905xl 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 power cord that is supplied with the unit
Warning: Do not open the unit. High voltages can cause
electrical shock! Servicing by qualified personnel only
Warning: Disconnect the power and unplug the unit from the wall
before installing
i
!
!

905xl - 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 905xl - Overview
3 Overview
The 905xl is a high quality power amplifier for stereo audio signals. It accepts
either a stereo audio signal on RCA connectors or a balanced stereo audio signal
on a terminal block connector. It delivers a speaker output of 110 watts RMS per
channel into a 4Ω load on a 10A 4 pin terminal block connector.
In particular, the 905xl features:
•An unbalanced, stereo input on RCA connectors
•A balanced, stereo input on a terminal block connector
•Two input selector buttons
•Volume control buttons
•A mute button
•Bass, treble, midrange, volume, balance and loudness controls (via
software)
•An RS-232 serial control port
You can control the 905xl using the front panel buttons, or remotely via RS-232
serial commands transmitted by a PC, touch screen system or other serial
controller.

4 Defining the 905xl Power Amplifier
Figure 1defines the front and rear panels of the 905xl.
Figure 1: 905xl Power Amplifier Front and Rear Panels
# Feature Function
1 INPUTS 1 and 2Buttons Press to select input audio source 1 (unbalanced) or 2 (balanced)
2 VOLUME ↑and ↓Buttons Press to increase or decrease the output volume
3 MUTE Button Press to mute the audio output (the button lights). Press again to unmute the audio output (see
Section 7.1.2
4
)
INPUT 1 LEFT RCA Connector Connect to the left channel of the unbalanced, stereo audio source (see Section 6
RIGHT RCA Connector
)
Connect to the right channel of the unbalanced, stereo audio source (see Section 6
5
)
INPUT 2 5-pin Terminal Block Audio Input Connect to the left and right channels of the balanced, stereo audio source
6 SPKR OUT 4-pin Terminal Block Speaker Output
Connect to the left and right channels of a balanced, stereo acceptor (speakers)
7 RS-232 9-pin D-sub Serial Port Connector Connect to a PC/serial controller (see Section 6.1
8
)
PROGRAM Switch Switch up to perform firmware upgrades. Leave down for normal operation
9 Mains Power Connector, Fuse and Power Switch
Plug in the power cord and switch the device on and off
5905xl – Defining the 905xl Power Amplifier

6 905xl - Installing in a Rack
5 Installing in a Rack
This section provides instructions for rack mounting the unit.

905xl - Connecting the 905xl Power Amplifier 7
6 Connecting the 905xl Power Amplifier
Always switch off the power to all devices before connecting them to
your 905xl. After connecting your 905xl, connect its power and then
switch on the power to each device.
Figure 2: Connecting the 905xl Power Amplifier
To connect the 905xl Power Amplifier as illustrated in the example in
Figure 2:
1. Connect an unbalanced stereo audio source (for example, the unbalanced
output of a DVD player) to the Input 1 L and R RCA connectors.
2. Connect a balanced stereo audio source (for example, the balanced stereo
audio output of a DVD player) to the Input 2 terminal block connector.
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