Kramer SPK-CC678 User manual

Kramer Electronics, Ltd.
USER MANUAL
Models:
SPK-CC678, Closed-back Ceiling Speakers
SPK-CCV448, Closed-back Ceiling Speakers
SPK-CCV444, Closed-back Ceiling Speakers

Contents
i
Contents
1Introduction 1
2Getting Started 1
3Overview 2
4Your Closed-back Ceiling Speakers 3
5Installing the Closed-back Ceiling Speakers 6
5.1 Choosing the Best Location 6
5.2 Cutting the Ceiling Tile 7
5.3 Mounting the Speakers 8
5.4 Painting the Speaker 10
6Technical Specifications 11
Figures
Figure 1: Closed-back Ceiling Speakers in a Boardroom Setup 2
Figure 2: SPK-CC678 Closed-back Ceiling Speaker 4
Figure 3: SPK-CCV448 / SPK-CCV444 Closed-back Ceiling Speaker 4
Figure 4: Closed-back Ceiling Speaker Schematic Diagram 6
Figure 5: Installing the Closed-back Ceiling Speakers 8
Figure 6: Plugging and Securing the Cable 9
Figure 7: Tighten the Mounting Tabs 9
Figure 8: Adjust Tap Selector (for the SPK-CC678) 10
Tables
Table 1: Closed-back Ceiling Speakers – Definition 2
Table 2: Closed-back Ceiling Speakers Hardware Items 5
Table 3: Ceiling Mounting Kit Items 5
Table 4: Technical Specifications of the SPK-CC678 11
Table 5: Technical Specifications of the SPK-CCV448 and the SPK-CCV444 11

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 groups1
Congratulations on purchasing your Kramer Closed-back Ceiling Speakers,
which are available in three models: SPK-CC678, SPK-CCV448 and
SPK-CCV444,and are ideal for:
that are clearly defined
by function.
•Conference rooms, classrooms and training rooms
•Boardrooms
•Hotel lobbies
•Presentation venues
The package includes the following items:
•SPK-CC678, and/or SPK-CCV448 and/or SPK-CCV444
•Mounting kit
•This user manual2
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 cables3
1 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; GROUP 11: Sierra Products
2 Download up-to-date Kramer user manuals from the Internet at this URL: http://www.kramerelectronics.com
3 The complete list of Kramer cables is on our Web site at http://www.kramerelectronics.com

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Overview
2
3 Overview
The Closed-back Ceiling speakers consist of a pair of high performance
closed back speakers. The pair can be mounted on the ceiling, as well as via a
ceiling mounting kit used to safely secure the speakers to the ceiling. Table 1
defines the Closed-back Ceiling speakers:
Table 1: Closed-back Ceiling Speakers – Definition
Name Diameter [“] Resistance [
Ω
] Closed-back Depth [“]
SPK-CC678 6.5 8 7
SPK-CCV448 4 8 4
SPK-CCV444 4 4 4
Figure 1shows an example of how the Closed-back Ceiling speakers can be
installed in a boardroom setup:
Figure 1: Closed-back Ceiling Speakers in a Boardroom Setup

Your Closed-back Ceiling Speakers
3
3
To achieve the best performance:
•Connect only good quality connection cables1
•Avoid interference from neighboring electrical appliances and position
your Kramer Closed-back Ceiling speakers away from moisture,
excessive sunlight and dust
, thus avoiding interference,
deterioration in signal quality due to poor matching, and elevated noise-
levels (often associated with low quality cables)
4 Your Closed-back Ceiling Speakers
Figure 2and Figure 3define the SPK-CC678 and the SPK-CCV448 and
SPK-CCV444, respectively.
1 Such as the Kramer BC-2S cable

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your Closed-back Ceiling Speakers
4
Figure 2: SPK-CC678 Closed-back Ceiling Speaker
Figure 3: SPK-CCV448 / SPK-CCV444 Closed-back Ceiling Speaker

Your Closed-back Ceiling Speakers
5
5
Table 2defines the Closed-back Ceiling speaker hardware items (per speaker
pair):
Table 2: Closed-back Ceiling Speakers Hardware Items
Description
A pair of
ceiling
speakers
(one shown1)
Two grilles
(one shown)
Cutout
template
Table 3defines the ceiling mounting kit items:
Table 3: Ceiling Mounting Kit Items
Four
support
ring screws
Two
ceiling
support
rings
(C-ring) –
one shown
Two pairs of
tile rails – one
of a pair
shown
Each Closed-back ceiling speaker is supported by a C-ring and two tile rails2.
When mounting onto the ceiling tiles3, use both supports. When mounting onto
a sheetrock ceiling, the C-ring alone is used to reinforce the ceiling material.
Figure 4shows a schematic diagram of the closed-back ceiling speaker:
1 The quantity applies to all models
2 The tile rails prevent the speakers from falling if the tile itself comes out or falls apart, as their ends catch onto the T-grid
3 Be sure that the tiles can support the speaker. Smaller sized tiles or fiberglass-type tiles cannot support the weight of the
speakers. When this is the case, the speakers will need additional support

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Installing the Closed-back Ceiling Speakers
6
Figure 4: Closed-back Ceiling Speaker Schematic Diagram
5 Installing the Closed-back Ceiling Speakers
This section explains how to install the closed-back ceiling speakers, that is:
•Choosing the best place to locate your speakers (see section 5.1)
•Cutting the ceiling tile (see section 5.2)
•Mounting the Speakers (see section 5.3)
•Painting the speakers (see section 5.4)
5.1 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 speakers
•Rear side of the speaker is not blocked by wall studs or other objects

Installing the Closed-back Ceiling Speakers
7
7
5.2 Cutting the Ceiling Tile
To cut the ceiling tile, do the following:
1. Remove the circle in the supplied template1
2. Mark the opening in the correct location by tracing the hole in the template.
.
3. Cut out the hole according to the template or with a circular cutter set to
the appropriate cutout size2
4. Route the wiring from the amplifier to the speakers’ cutout holes, taking
care not to place them next to electrical wires or at least at a distance of
about two feet from an AC line
.
3
If you are mounting the speakers onto a ceiling tile, remove the ceiling tiles
where you plan to install the speakers. Use the template to trace and then
cutout the speaker hole over an empty box.
.
The closed-back ceiling speakers are supported by the ceiling mounting kit
(two C-rings and two pairs of tile rails4). When mounting onto the ceiling
tiles5
, use both supports. When mounting onto a sheetrock ceiling, the C-ring
alone is used to reinforce the ceiling material.
1 Keep this template for later use as a mask, as you may want to paint the speakers (see section 5.3)
2 Initially, you can cut a smaller area inside the marked hole just to be sure that the space above the speakers is clear
3 Do not nail or staple the speaker wires
4 The tile rails prevent the speakers from falling if the tile itself comes out or falls apart, as their ends catch onto the T-grid
5 Be sure that the tiles can support the speaker. Smaller sized tiles or fiberglass-type tiles cannot support the weight of the
speakers. When this is the case, the speakers will need additional support

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Installing the Closed-back Ceiling Speakers
8
5.3 Mounting the Speakers
To install the closed-back ceiling speakers, do the following:
1. Place the C-ring over the hole cut in the ceiling tile (on the “ceiling”
side). Place it around the hole so that the tabs are located in parallel to the
tile edges (see Figure 5).
T-channel Grid
Support Ring
Screws Ceiling Tile
Tile Rails
C-ring
Figure 5: Installing the Closed-back Ceiling Speakers
2. Place the tile rails on the tile and snap them into the two tabs on the
C-ring.
Align the rails so that the ends extend over the T-channel grid.
3. Insert a screw through each tab on the C-ring to secure the rails.
4. Connect the speaker wires to the appropriate connector terminals1and
screw the hold-down screws on the connector until tight2
Wiring in parallel: connect the wire pair of the subsequent speaker
to PIN 2 and PIN 3. When one input connector is removed,
subsequent speakers will remain connected (see
.
You can connect the speakers in the two following possible layouts:
Figure 4)
Daisy-chaining: connect the wire pair of the subsequent speaker to
PIN 1 and PIN 4. When one input connector is removed, subsequent
speakers will be disconnected (see Figure 4)
5. Plug the connector into the socket in the terminal cup of the speaker (see
Figure 6).
6. Run the wires through the wires’ opening in the input terminal cover plug
and then into the terminal block connector of the speaker.
1 PIN 1 and PIN 2 are connected internally and are positive (+). PIN 3 and PIN 4 are connected internally and are negative (-)
2 Use a small screwdriver