Kramer SPK-OCA504 User manual

KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
SPK-OCA504
On-Wall Active Speakers
P/N: 2900-000724 Rev 3

SPK-OCA504 – Contents i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
3Overview 3
4Your SPK-OCA504 5
5Installing the Speakers 7
5.1 Choosing the Best Location 7
5.2 Installing the Speaker Wires 7
6Technical Specifications 9
Figures
UFigure 1: Active On-Wall Speakers in a Home Theater SetupU4
UFigure 2: Active On-Wall Speakers in a Conference Room SetupU4
UFigure 3: SPK-OCA504 Active SpeakerU5
UFigure 4: Connecting the Active Speaker to the Passive SpeakerU7

SPK-OCA504 - Introduction 1
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 11 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.
Congratulations on purchasing your Kramer SPK-OCA504 On-Wall Active
Speakers, which are ideal for the following typical applications:
•Boardrooms •Presentation venues
•Conference Rooms •Home theater
•Educational classrooms
The package includes one of each of the following items:
•A pair of SPK-OCA504 Active Speakers
•An RCA cable (2 meters)
•A speaker cable for connecting the active speaker to the passive speaker (4
meters)
•An AC power cord (1.8 meters)
•A pair of U-shaped rotating mounting brackets with 4 mounting bracket
screws
•This user manual

2 SPK-OCA504 - 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
•Use Kramer high-performance high-resolution cables
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 (such as the Kramer BC-2S) to
avoid interference, deterioration in signal quality due to poor matching, and
elevated noise levels (often associated with low quality cables)
•Avoid interference from neighboring electrical appliances that may adversely
influence signal quality
•Position your Kramer SPK-OCA504 away from moisture, excessive sunlight
and dust
To ensure that you obtain the best sound results, do not open the
housing of the passive speaker or the active speaker.
i
i

SPK-OCA504 - Overview 3
3
3 Overview
The SPK-OCA504 is a powered two-way speaker system designed for indoor wall
mounting. The system accepts a line level stereo input and amplifies it using a
built-in amplifier and outputs a speaker signal to the passive speaker.
The SPK-OCA504 speaker system features:
•Three available inputs (that can either be connected separately or
connected simultaneously to form a mix of the inputs) that consist of:
A Line level unbalanced stereo audio input on a 3.5mm mini jack
connector
A balanced stereo audio input on a 5-pin terminal block connector
An unbalanced stereo audio input on two RCA connectors
•An output to external amplified or non-amplified speakers
•An output to an external sub-woofer
•A unique looping output, letting you chain additional pairs of active and
passive speakers
•TREBLE, BASS and VOLUME control knobs
•A control panel on the back of the active speaker that controls all the
functions of both speakers
•A magnetic shield
•Enhanced bass reflex design
•An integrated 2x30W stereo amplifier (no external amplifier required)
•A self adjusting power range of 90 to 240V AC
•Auto-power shutoff
The SPK-OCA504 is enclosed in an ABS cabinet and can be mounted indoors on
the wall, vertically or horizontally. The mounting brackets are made of hardened
steel that attach to each speaker, letting you rotate each speaker to the left or
right.

4 SPK-OCA504 - Overview
Figure 1 and Figure 2 show examples of how the speakers can be installed in
conference room and home theater setups, respectively.
Figure 1: Active On-Wall Speakers in a Home Theater Setup
Figure 2: Active On-Wall Speakers in a Conference Room Setup
LCD Display/
Plasma Display
Right On Wall
Speaker
SPK-OCA504
(Passive)
Left On Wall
Speaker
SPK-OCA504
(Active)
Projector
On Wall
Speakers
SPK-OCA504
Switcher/Scaler
Computer
Graphics
Source
DVD
Laptop
Left (Active)
Right (Passive)

SPK-OCA504 - Your SPK-OCA504 5
5
4 Your SPK-OCA504
This section defines the active SPK-OCA504:
Figure 3: SPK-OCA504 Active Speaker

6 SPK-OCA504 - Your SPK-OCA504
#
Feature
Function
1 SPEAKER OUT Connectors Connect the active speaker to the (+) and (-)
stereo sockets on the passive speaker
The L speaker is active and the R speaker is
passive
2 INPUT
Connectors
5-pin Terminal Block
Connect the audio source to one or more of the
input connectors
3 3.5mm Mini Jack
4 L and R RCA
5 BASS Control Knob Rotate the button to control the bass
6 TREBLE Control Knob Rotate the button to control the treble
7 VOLUME Control knob Rotate the button to adjust the audio volume
8 AC-Input Power Supply Connect to the AC power cord
9 POWER Switch For turning the unit ON (I), OFF (0) or AUTO
shutoff (II)
When selecting the AUTO shutoff mode, the
speaker enters the standby mode when idle
for over 10 minutes
10 POWER/STANDBY LED Illuminates in green when powered (POWER
switch set to ON or AUTO)
illuminates in red when in the standby mode
(POWER switch is set to AUTO)
In the AUTO mode, the LED illuminates green
if an input signal is detected and illuminates
red if idle for over 10 minutes
11 LOOP OUTPUT 3.5mm Mini Jack
Connector
Connect to another pair of active speakers
12 SUB OUT 3.5mm Mini Connector If required, connect an active sub-woofer to this
output for maximum bass reproduction

SPK-OCA504 - Installing the Speakers 7
7
5 Installing the Speakers
This section explains how to:
•Choose the best location for your speakers (see Section 5.1
•Install the speaker wires (see
)
Section 5.2
5.1 Choosing the Best Location
)
Before installing the speakers:
•Experiment by placing the speakers in different locations before finally
deciding on the most suitable location
•Be sure that the wall type is appropriate for the mounting brackets, that is,
either solid wood, bricks, concrete, hollow building blocks, or wood studs.
You cannot mount the brackets on gypsum walls
•Check that the mounting location is free of obstructions, such as electrical
piping, AC ducts or water lines, and so on
5.2 Installing the Speaker Wires
To install the speakers, do the following:
1. Connect the + and - stereo sockets of the active speaker to the + and -
stereo sockets of the passive speaker using the cable supplied, as follows:
Figure 4: Connecting the Active Speaker to the Passive Speaker
Active Speaker (L)
Passive Speaker (R)

8 SPK-OCA504 - Installing the Speakers
2. Connect the audio source (for example, a CD or a DVD player and so on) to
one of the INPUT connectors on the active speaker.
3. Connect the power.
4. Adjust the volume on the input source.
5. Adjust the volume control on the rear side control panel.
6. Adjust the bass and treble control on the rear side control panel.
7. If required, connect an additional set of speakers by connecting the LOOP
OUTPUT connector to the input of a second active speaker.
8. If required, mount the speaker on the wall via the removable mounting
brackets. To do so:
Mark the location of the mounting holes
Screw the mounting screws (not included in the package) into the
mounting holes
Slide the mounting bracket over the mounting screws so that the
mounting bracket is secured to the surface