Kramer SPK-C812 User manual

KRAMER ELECTRONICS LTD.
USER MANUAL
MODELS:
SPK-C812
SPK-C813
SPK-C814
SPK-C815
SPK-C816
SPK-C817
SPK-C818
SPK-C819
SPK-C820
ESD™ Complete K-overage
Ceiling Speaker
P/N: 2900-300119 Rev 1

ESD Ceiling Speaker – Contents i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
3Overview 3
3.1 Defining the ESD Ceiling Speaker 5
4Installing the ESD Ceiling Speaker 6
4.1 Choosing the Best Location 6
4.2 The Input Pinout 6
4.3 Determining the Number of Speakers Needed and their Location 7
4.4 Preparing the ESD Ceiling Speaker for Operation 9
4.5 Installing the Tile Size Speaker 9
4.6 Installing the Half-Tile Size Speaker 11
5Technical Specifications 14
Figures
Figure 1: Tile Size ESD Ceiling Speaker (that fits into the ceiling) 4
Figure 2: ESD Ceiling Speaker 5
Figure 3: ESD Ceiling Speaker Input Pinout 6
Figure 4: Speaker Location in a Room—using ESD Speakers vs. using Standard Ceiling Speakers7
Figure 5: Connecting One Stereo Speaker 8
Figure 6: Connecting Two Mono Speakers 8
Figure 7: Fitting the Tile Size Speaker 10
Figure 8: Securing the Speaker to a Ceiling Anchor Point 10
Figure 9: Placing the Ceiling Mounting Bracket 11
Figure 10: Fitting the Half-Tile Size Speaker 12
Figure 11: Replacing the Ceiling Tile 12
Figure 12: ESD Ceiling Speaker in a Boardroom Setup 13

ESD Ceiling Speaker - 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 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 ESD™ (Equal Sound Dispersion)
Ceiling Speaker, which is ideal for overhead distributed audio for professional
applications (music and speech) and educational applications (mainly speech), as
shown here:
Complete K-overage ESD
® Ceiling Speakers:
Applications
SPK-C812, SPK-C813, SPK-C814,
SPK-C815, SPK-C820
SPK-C816, SPK-C817, SPK-C818,
SPK-C819
Business and professional environments
(such as presentations)
Educational environments
(such as lectures)
•Conference rooms and boardrooms
•Hotel lobbies and large office buildings
•Retail stores
•Airports
•University lecture halls
•Classrooms
•Presentation venues

2 ESD Ceiling Speaker - 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 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 Speakersaway from moisture, excessive sunlight and
dust
i

ESD Ceiling Speaker - Overview 3
3 Overview
The ESD™ (Equal Sound Dispersion) Ceiling Speaker is a high- performance
complete K-overage ESD ceiling speaker that can be mounted on the ceiling and
appears as a suspended ceiling tile.
The ESD ceiling speaker is constructed with a central driver and four pivoting
tweeters and is housed in an enclosed shallow enclosure.
The Kramer complete K-overage ESD provides unmatched sound response in a
suspended ceiling device for the professional (PRO) and educational (EDU)
markets. This means that you get the sound you need but with a reduced number
of speakers.
The ESD ceiling speaker features:
•Complete K-overage ESD™ – a patent pending design with 4 pivoting
tweeters that direct the sound, based on the room environment, for equal
sound dispersion (ESD)
•Wide 180° sound dispersion
•One Kramer ESD speaker that replaces multiple standard speakers for quick
and easy installation
•Excellent bass response that is optimized for music and high−quality voice
reproduction
•4 pivoting tweeters, 3/4” (6Ω) with silk domes
•A polypropylene cone woofer (8Ω)
•A 40W RMS power rating
•Smooth frequency response
•A shallow 4-inch depth (approx. 100mm)
•RoHS compliance
Compliance to RoHS means acting in full accordance with RoHS regulations that
restrict the use of certain dangerous substances commonly used in electronic and
electronic equipment
•A choice of models: tile size or half-tile size, stereo or mono (see table
below)

4 ESD Ceiling Speaker - Overview
•A bass port for a bass reflex effect (for educational models)
Figure 1: Tile Size ESD Ceiling Speaker (that fits into the ceiling)
The speaker is easily installed and is available in eight different models: PRO or
EDU, stereo or mono, tile size or half-tile size configurations, and a slightly smaller
size (for any region with suspended ceiling tiles of 595mm) as defined here:
Complete K-overage ESD® Ceiling Speakers Available Models
Model Name Part Number Description
Professional
tile size stereo SPK-C812
•Polypropylene woofer, surrounded with rubber
•2 left and 2 right silk dome tweeters
•No bass reflex
Professional
tile size mono SPK-C813
•Polypropylene woofer, surrounded with rubber
•4 silk dome tweeters
•No bass reflex
Professional
half-tile size
stereo
SPK-C814
•Polypropylene woofer, surrounded with rubber
•2 left and 2 right silk dome tweeters
•No bass reflex
Professional
half-tile size
mono
SPK-C815
•Polypropylene woofer, surrounded with rubber
•4 silk dome tweeters
•No bass reflex
Educational tile
size stereo SPK-C816
•Paper cone woofer, surrounded with rubber
•2 left and 2 right Ti pivoting tweeters, installer adjusted
•Bass reflex
Educational tile
size mono SPK-C817
•Paper cone woofer, surrounded with rubber
•4 Ti pivoting tweeters, installer adjusted
•Bass reflex
Educational
half-tile size
stereo
SPK-C818
•Paper cone woofer, surrounded with rubber
•2 left and 2 right Ti pivoting tweeters, installer adjusted
•Bass reflex
Educational
half-tile size
mono
SPK-C819
•Paper cone woofer, surrounded with rubber
•4 Ti pivoting tweeters, installer adjusted
•Bass reflex
Professional
Tile size stereo
(for 595mm
tiles)
SPK-C820
•Polypropylene woofer, surrounded with rubber
•2 left and 2 right silk dome tweeters
•No bass reflex

ESD Ceiling Speaker - Overview 5
3.1 Defining the ESD Ceiling Speaker
Figure 2defines the ESD Ceiling Speaker:
Figure 2: ESD Ceiling Speaker
Flat Ceiling Speaker Features
# Feature Function
1 Speaker Tile Base Half-tile size or tile size
2 Speaker Steel Enclosure Shallow fireproof enclosure
3 INPUT Terminal Block Connector Connect to the audio source (see Section 4.2
4
)
Anchor Ring Secure the speaker to the ceiling anchoring point
5 Tweeters (4) Pivoting titanium or silk
6 Woofer Polypropylene or paper surrounded by rubber
7 Bass Port For a bass reflex effect
Top View Underside View

6 ESD Ceiling Speaker - Installing the ESD Ceiling Speaker
4 Installing the ESD Ceiling Speaker
This section explains how to install the ESD Ceiling Speaker, that is:
•Choosing the best place to locate your speaker (see Section 4.1
•Connecting the wires (see
)
Section 4.2
•Determining the number of speakers (see
)
Section 4.3
•Preparing the speaker for operation (see
)
Section 4.4
•Installing the tile size speaker (see
)
Section 4.5
•Installing the half-tile size speaker (see
)
Section 4.6
4.1 Choosing the Best Location
)
Ideally, locate the speakers above the main listening area. Before doing so, be
sure that:
•The desired location is free of obstructions, such as electrical piping,
AC ducts or water lines, and so on
•There is enough space behind the mounting surface for the speaker
•The rear side of the speaker is not blocked by wall studs or other objects
4.2 The Input Pinout
Figure 3illustrates the terminal block pinout for mono and stereo models
respectively:
Figure 3: ESD Ceiling Speaker Input Pinout
The red wire connects to the + pin and the black wire connects to
the – pin.
Mono Model Pinout Stereo Model Pinout
INPUT
R L
INPUT
i

ESD Ceiling Speaker - Installing the ESD Ceiling Speaker 7
4.3 Determining the Number of Speakers Needed and their
Location
When installed in a room with a standard ceiling height of 2.7m (8.8 feet), the
optimal distance between the speakers is about 10 meters. The speaker should be
installed lengthwise relative to the shape of the room. The example in Figure 4
shows the ESD Ceiling Speaker installed in a 10m x 5m room. A 10m x 5m room
size requires only one ESD speaker for full room coverage rather than four
standard ceiling speakers.
Figure 4: Speaker Location in a Room—using ESD Speakers vs. using Standard Ceiling Speakers
To achieve optimum sound quality and ESD (Equal Sound Dispersion):
•Select the appropriate output from the amplifier to use with the speaker
(either stereo or mono)
•If the size of the room only requires a single speaker, we recommend using the
mono/stereo speaker model for speech and music (see Figure 5)

8 ESD Ceiling Speaker - Installing the ESD Ceiling Speaker
•If the size of the room requires more than one speaker, use two mono
speaker models. Connect the speakers to the left and right connectors of the
amplifier, respectively (see Figure )6
Figure 5: Connecting One Stereo
Speaker
Figure 6: Connecting Two Mono
Speakers
OUTPUT
INPUT
Amplifier
Speaker
8Ω
OUTPUT
INPUT
INPUT
Amplifier
Speaker
Speaker
8Ω
8Ω