Kramer SPK-C611 User manual

              
  


    


 !" # #
$ # # !# % &!

This page is intentionally left blank

SPK-C611 – Contents i
Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
3Overview 3
4Your SPK-C611 4
5Installing the Open-back Ceiling Speakers 6
5.1 Choosing the Best Location 6
5.2Cutting the Ceiling Tile 6
5.3 Installing the Open Back Ceiling Speakers 7
5.4 Painting the Speaker 9
6Technical Specifications 10
Figures
Figure 1: Open-back Ceiling Speakers in a Boardroom Setup 3
Figure 2: SPK-C611 Open-back Ceiling Speakers 4
Figure 3: Position Mounting Tab 7
Figure 4: Installing the Open-back Ceiling Speakers 8

This page is intentionally left blank

SPK-C611 - 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 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 SPK-C611 Open-back Ceiling
Speakers, which are ideal for the following typical applications:
•Boardrooms •Presentation venues
•Conference rooms •Training rooms
•Educational classrooms •Hotel lobbies
The package includes one of each of the following items:
•A pair of SPK-C611 speakers
•A cardboard template
•This user manual

2 SPK-C611 - 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)
•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 SPK-C611 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-C611 - Overview 3
3
3 Overview
The SPK-C611 speakers include a pair of high performance Open-back Ceiling
speakers that can be mounted on the ceiling. The optional Kramer Suspended
Ceiling Speaker Mounting Kit (SKIC) can safely secure the speakers to the ceiling
as well.
Figure 1 shows an example of how the Open-back Ceiling speakers can be
installed in a boardroom setup:
Figure 1: Open-back Ceiling Speakers in a Boardroom Setup

4 SPK-C611 - Your SPK-C611
4 Your SPK-C611
Figure 2 defines the SPK-C611:
Figure 2: SPK-C611 Open-back Ceiling Speakers
The speaker black and red stereo sockets connect to the black and red sockets of
the amplifier.

SPK-C611 - Your SPK-C611 5
5
The following table defines the Open-back ceiling speaker hardware items (per
speaker pair):
Description
A pair of ceiling
speakers
(one shown)
Two grilles
(one shown)
Cutout
template
The following table defines the items that make up the optional Suspended Ceiling
Speaker Mounting Kit (SKIC):
Four
support
ring
screws
Two ceiling
support rings
(C-ring) – (one
shown)
Two pairs of tile
rails (one of a
pair shown)
Each Open-back ceiling speaker is supported by a C-ring and two tile rails. 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.
When mounting onto the ceiling tiles, use both supports. When mounting onto a
sheetrock ceiling, the C-ring alone is used to reinforce the ceiling material.
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.
i

6 SPK-C611 - Installing the Open-back Ceiling Speakers
5 Installing the Open-back Ceiling Speakers
This section explains how to install the Open-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)
•Installing 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
•The rear side of the speaker is not blocked by wall studs or other objects
5.2 Cutting the Ceiling Tile
To cut the ceiling tile, do the following:
1. Remove the circle in the supplied template.
Keep this template for later use as a mask, as you may want to paint the speakers (see
Section 5.4)
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 size.
Initially, you can cut a smaller area inside the marked hole just to be sure that the
space above the speakers is clear
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.

SPK-C611 - Installing the Open-back Ceiling Speakers 7
7
Do not nail or staple the speaker wires.
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 open-back ceiling speakers are supported by the ceiling mounting kit (two
C-rings and two pairs of tile rails. 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). When
mounting onto the ceiling tiles, use both supports.
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.
When mounting onto a sheetrock ceiling, the C-ring alone is used to reinforce the
ceiling material.
5.3 Installing the Open Back Ceiling Speakers
To install the Open-back Ceiling speakers, do the following:
1. Remove the grille over the speakers by inserting a paper clip into one of the
grille openings and pulling it upward.
2. Position the mounting tabs (see Figure 3) inward.
Figure 3: Position Mounting Tab
3. Insert the supplied screws into the screw openings from the front of the
speakers.
!
i

8 SPK-C611 - Installing the Open-back Ceiling Speakers
4. Connect the speaker wires to the speaker terminals.
5. Insert the speaker into the opening and tighten the screws.
When tightening the screws, the tabs automatically turn outward, thus
clamping the speaker to the wall from its rear side.
Do not over-tighten the screws. It may cause damage to both the
speakers and the surface.
6. Push the grille firmly into the slot in the speaker baffle.
5.3.1 Using the Suspended Ceiling Speaker Mounting Kit (Optional)
To install the Open-back ceiling speakers using the mounting kit, 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 4).
Figure 4: Installing the Open-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 speaker terminals.
i
T-channel Grid
Support Ring
Screws
Ceiling Tile
Tile Rails
C-ring

SPK-C611 - Installing the Open-back Ceiling Speakers 9
9
5. Insert the speaker into the opening and tighten the screws.
When tightening the screws, the tabs automatically turn outward, thus
clamping the speaker to the wall from its rear side.
Do not over-tighten the screws. It may cause damage to both the
speakers and the surface.
6. Push the grille firmly into the slot in the speaker baffle.
Check that the grille is securely seated.
To remove the grille, insert two bent paper clips into the holes in the grille and carefully
pull it down. Repeat this around the perimeter of the grille until it is completely removed
5.4 Painting the Speaker
You can paint the speakers before or after the speakers are installed. When
painting before installation:
•Clean the rim and grille with mineral spirits or other light solvent that is
unlikely to damage the surface
•Spray with color by holding the spray can at an angle of 45°
When spraying the grille, take care not to clog the holes in the grille
as this will greatly reduce the sound quality of the speakers.
When painting after installation:
•Use the circle that you cut out of the template as a paint mask
•After you finish painting, remove the paint mask
i
i

10 SPK-C611 - Technical Specifications
6 Technical Specifications
Audio and Power
DESCRIPTION: 2-way open ceiling speakers
HIGH FREQUENCY DRIVER: 1/2" MYLAR dome tweeter
LOW FREQUENCY DRIVER: 6.5” Polypropylene cone with rubber edge woofer
IMPEDANCE: 8Ω
DISPERSION COVERAGE: 120° @2000Hz
CROSSOVER FREQUENCY: 3kHz
NOMINAL SENSITIVITY: 84dB SPL @1m, 1W
DIRECTIVITY FACTOR (Q): 5.1 (averaged 100Hz – 10kHz); 6.2 (2kHz)
DIRECTIVITY INDEX (DI): 6.8dB (averaged 100Hz – 10kHz); 5.0dB (2kHz)
FREQUENCY RESPONSE: 60Hz to 20kHz
INPUT POWER: 30W RMS, 60W Max., continuous load (24hr) 30W
RECOMMENDED AMPLIFIER
POWER:
30W
INPUT CONNECTOR: Spring Type Push Terminal Block
Shipping and Installation
WEIGHT PER SINGLE SPEAKER: 1.15kg (2.54lbs) approx.
SHIPPING WEIGHT (FOR PAIR): 3.7kg (8.16lbs) approx.
DIMENSIONS (OD): 23cm (9.06")
CUT OUT SIZE (MOUNT
DIMENSION):
19.5cm (7.68")
MOUNT DEPTH: 7cm (2.76")
ACCESSORIES: Ceiling mounting kit
Specifications are within a 10% tolerance and are subject to change without notice at
http://www.kramerelectronics.com

     
 
 
  
 


 
 
P/N:
2900- 300204
Rev:
2
!

!
""