SPK-C819 - Pregnant Kramer - Free user manual and instructions

Product Type	Educational Ceiling Speaker (Half-Tile Size, Mono)
Model	SPK-C819
Speaker Type	Two-way bass reflex closed ceiling speaker
Input Power	40W RMS; max 80W; continuous load: 40W (24Hr)
Nominal Sensitivity	90dB SPL @1m
Mean SPL	90dB +/- 1dB @1W-1m
Crossover Frequency	2kHz
Frequency Range	Nominal: 150Hz-20kHz; max: 100Hz-20kHz
Woofer	8" (203mm) paper cone with rubber surround (8Ω)
Tweeter	4 x 1" (25mm) titanium dome pivoting tweeter (6Ω each)
Impedance (Woofer)	8Ω
Impedance (Tweeter)	6Ω
Sound Dispersion	Wide 180° dispersion with Equal Sound Dispersion (ESD) technology
Bass Reflex	Yes (bass port for bass reflex effect)
Dimensions (Half-Tile)	30cm x 60cm x 10cm (approx.)
Weight (Net)	6.3kg (13.9lbs) approx.
Weight (Shipping)	7.8kg (17.2lbs) approx.
Mounting	Ceiling installed in suspended ceiling grid (half-tile size)
Accessories Included	Ceiling mounting bracket (for half-tile size)
Warranty	1 year labor and parts from date of first customer purchase
Compliance	RoHS compliant
Safety	Disconnect power before servicing; use supplied DC power supply

Frequently Asked Questions - SPK-C819 Kramer

What is the SPK-C819 speaker used for?

The Kramer SPK-C819 is an educational half-tile size mono ceiling speaker ideal for overhead distributed audio in classrooms, lecture halls, and presentation venues, with optimized voice reproduction.

How do I install the half-tile size speaker?

Remove a ceiling tile, cut it in half, insert the supplied ceiling mounting bracket between rails, drop the speaker into the opening, and secure it with the anchor ring to a ceiling anchor point. No screws are needed.

What is the difference between mono and stereo models?

Mono models like SPK-C819 have four tweeters wired for a single channel, ideal for covering larger areas with multiple speakers. Stereo models (like SPK-C818) have two left and two right tweeters for stereo sound in a single speaker.

How do I connect the speaker to an amplifier?

Use the INPUT terminal block connector. Connect the red wire to + and black wire to -. For mono, use a single amplifier channel. For multiple speakers, connect left and right channels to separate mono speakers.

How many speakers are needed for a room?

One SPK-C819 covers up to 10m x 5m (at 2.7m ceiling height). For larger rooms, use two or more mono speakers spaced about 10m apart.

Can the tweeters be adjusted?

Yes, the four pivoting titanium tweeters can be individually angled outward to direct sound according to room shape and size for equal sound dispersion.

What type of amplifier should I use?

Use an amplifier with a power rating matching the speaker's 40W RMS (80W max). Ensure impedance is compatible (woofer 8Ω, tweeter 6Ω). Consult your amplifier manual for proper setup.

Is the speaker suitable for music playback?

Yes, it is optimized for both music and speech, with a frequency range of 100Hz-20kHz and a bass reflex design for enhanced low-frequency response.

What is the warranty period?

Kramer provides a one-year warranty on labor and parts from the date of first customer purchase, covering defects in material and workmanship.

Can I install the speaker myself?

Installation is straightforward but requires caution. Ensure the ceiling anchor is secure. For safety, disconnect power before wiring. If unsure, consult an authorized Kramer installer.

USER MANUAL SPK-C819 Kramer

ESD™ Complete K-overage

Ceiling Speaker

Contents

1 Introduction 1

2 Getting Started 2

2.1 Achieving the Best Performance 2

3 Overview 3

3.1 Defining the ESD Ceiling Speaker 5

4 Installing 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

5 Technical 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 Speakers 7

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

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 boardroomsHotel lobbies and large office buildingsRetail storesAirports	University lecture hallsClassroomsPresentation venues

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 Speakers away from moisture, excessive sunlight and dust

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)

• A bass port for a bass reflex effect (for educational models)

Isometric line drawing of a rectangular electronic component with a small protrusion, placed on a flat base (no text or symbols)

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-ovage ESD® Ceiling Speakers Available Models
Model Name	Part Number	Description
Professional tile size stereo	SPK-C812	Polypropylene woofer, surrounded with rubber2 left and 2 right silk dome tweetersNo bass reflex
Professional tile size mono	SPK-C813	Polypropylene woofer, surrounded with rubber4 silk dome tweetersNo bass reflex
Professional half-tile size stereo	SPK-C814	Polypropylene woofer, surrounded with rubber2 left and 2 right silk dome tweetersNo bass reflex
Professional half-tile size mono	SPK-C815	Polypropylene woofer, surrounded with rubber4 silk dome tweetersNo bass reflex
Educational tile size stereo	SPK-C816	Paper cone woofer, surrounded with rubber2 left and 2 right Ti pivoting tweeters, installer adjustedBass reflex
Educational tile size mono	SPK-C817	Paper cone woofer, surrounded with rubber4 Ti pivoting tweeters, installer adjustedBass reflex
Educational half-tile size stereo	SPK-C818	Paper cone woofer, surrounded with rubber2 left and 2 right Ti pivoting tweeters, installer adjustedBass reflex
Educational half-tile size mono	SPK-C819	Paper cone woofer, surrounded with rubber4 Ti pivoting tweeters, installer adjustedBass reflex
Professional Tile size stereo (for 595mm tiles)	SPK-C820	Polypropylene woofer, surrounded with rubber2 left and 2 right silk dome tweetersNo bass reflex

3.1 Defining the ESD Ceiling Speaker

Figure 2 defines the ESD Ceiling Speaker:

graph TD
    A["Top View"] --> B["Device Layout"]
    C["Underside View"] --> D["Device Layout"]
    style A fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style D fill:#ccf,stroke:#333

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

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 3 illustrates 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.

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)

- 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

4.4 Preparing the ESD Ceiling Speaker for Operation

Once the location of the speaker is fixed, prepare the speaker for operation as follows:

1. Move each of the pivoting tweeters outward in an angle that is suited to the room shape and size.
2. Run the wires from the amplifier through the ceiling.
3. Remove the ceiling tile at the place where you plan to install the speaker.
4. Connect the speaker wires to the speaker terminals (see Figure 3) from the adjacent ceiling tile opening.
5. Place the speaker temporarily in place, and test the audio quality.
6. If you are satisfied, disconnect the amplifier and remove the speaker from the ceiling. If not, change the position of the tweeters and check the audio quality again until you are happy with the results.
7. Fit the speaker grille over the speaker underside and tighten with screws.

To install the tile size speaker, see Section 4.5.

To install the half-tile size speaker, see Section 4.6

4.5 Installing the Tile Size Speaker

1. Drop the speaker into the ceiling tile space. Make sure that you position the speaker lengthwise relative to the room shape (see Figure 7).

Figure 7: Fitting the Tile Size Speaker

1. Secure the speaker by connecting the speaker support ring to an independent secure ceiling anchor point (see Figure 8) as appropriate. The anchor prevents the speaker from falling if the tile itself comes out or falls apart.

Pure technical line drawing of a mechanical assembly without any text, numbers, or symbols

Figure 8: Securing the Speaker to a Ceiling Anchor Point

1. If required, daisy-chain the next speaker (see Section 4.3).

Note: Do not over-tighten the screws. It may cause damage to both the speakers and the surface.

4.6 Installing the Half-Tile Size Speaker

When installing the half-tile size model:

1. Remove the ceiling tile.

2. Cut the ceiling tile in half (to 30x60cm).

3. Place the ceiling mounting bracket (supplied with the half-tile unit only) between the ceiling rails, as illustrated in Figure 9.

Isometric line drawing of a structural framework with four rectangular panels, no text or symbols present

Figure 9: Placing the Ceiling Mounting Bracket

1. Drop the half-tile size speaker in the appropriate opening, so it is supported by the ceiling rails and the ceiling mounting bracket (see Figure 10). No screws are needed.

Isometric line drawing of a solar panel array with a central box and grid lines (no text or symbols)

Figure 10: Fitting the Half-Tile Size Speaker

1. Replace half of the ceiling tile (see Figure 11).

Isometric line drawing of a solar panel array with a central device (no text or symbols)

Figure 11: Replacing the Ceiling Tile

1. Secure the speaker by connecting the speaker support ring to an independent secure ceiling anchor point (see Figure 8).

The anchor prevents the speaker from falling if the tile itself comes out or falls apart.

Figure 12 shows an example of how the ESD Ceiling Speaker can be installed in a boardroom setup:

graph TD
    A["ESD Ceiling Speaker"] -->|Audio| B["SV-551"]
    B -->|Audio Lines IN| C["Projector"]
    C -->|RS-722, I234, CV| B
    B -->|Mic. or Audio Player| D["Monitor"]

Figure 12: ESD Ceiling Speaker in a Boardroom Setup

5 Technical Specifications

Technical Specifications of the PRO ESD Ceiling Speakers
INPUT POWER:	40W RMS; max. 80 W; continuous load: 40W (24Hr)
NOMINAL SENSITIVITY:	87dB SPL @1m
CROSSOVER FREQUENCY:	2kHz
MEAN SPL:	87dB +/- 1dB @1W-1m
FREQUENCY RANGE:	Nominal: 80Hz-20kHz; max: 60Hz-20kHz
SPEAKER TYPE:	Two-way closed ceiling speaker
WOOFER:	8" (203mm) polypropylene cone with rubber surround
TWEETER: 4 X 3/4" (19mm) silk dome pivoting tweeter
IMPEDANCE:	Woofer: 8Ω; tweeter: 6Ω
SENSITIVITY: 87dB SPL @1W,	1m
DIMENSIONS:	30cm x 60cm x 10cm (half-tile size); 60cm x 60cm x 10cm (tile size);59.5cm x 59.5cm x 10cm (tile size) for any region with suspendedceiling tiles of 595mm
WEIGHT:	6.3kg (13.9lbs) approx. (half-tile size); 6.5kg (14.3lbs) approx. (tilesize)
SHIPPING WEIGHT:	7.8kg (17.2lbs) approx. (half tile); 8.0kg (17.6lbs) approx. (tile size)
ACCESSORIES:	Ceiling mounting bracket (supplied with half-tile size units only)
Specifications are subject to change without notice at http://www.kramerelectronics.com

Technical Specifications of the EDU ESD Ceiling Speakers
INPUT POWER:	40W RMS; max. 80 WContinuous load: 40W (24Hr)
NOMINAL SENSITIVITY:	90dB SPL @1m
CROSSOVER FREQUENCY:	2kHz
MEAN SPL:	90dB +/- 1dB @1W-1m
FREQUENCY RANGE:	Nominal: 150Hz-20kHz; max: 100Hz-20kHz
SPEAKER TYPE:	Two-way bass reflex closed ceiling speaker
WOOFER:	8" (203mm) paper cone with rubber surround
TWEETER:	4 X 1" (25mm) titanium dome pivoting tweeter
IMPEDANCE:	Woofer: 8Ω; tweeter: 6Ω
SENSITIVITY: 90dB SPL @1W,	1m
DIMENSIONS:	30cm x 60cm x 10cm (half-tile size); 60cm x 60cm x 10cm (tile size)
WEIGHT:	6.3kg (13.9lbs) approx. (half-tile size); 6.5kg (14.3lbs) approx. (tile size)
SHIPPING WEIGHT:	7.8kg (17.2lbs) approx. (half-tile size); 8.0kg (17.6lbs) approx. (tile size)
ACCESSORIES:	Ceiling mounting bracket (supplied with half-tile size units only)
Specifications are subject to change without notice at http://www.kramerelectronics.com

LIMITED WARRANTY

We warrant this product free from defects in material and workmanship under the following terms.

HOW LONG IS THE WARRANTY

Labor and parts are warranted for one year from the date of the first customer purchase.

WHO IS PROTECTED?

Only the first purchase customer may enforce this warranty.

WHAT IS COVERED AND WHAT IS NOT COVERED

Except as below, this warranty covers all defects in material or workmanship in this product. The following are no covered by the warranty:

1. Any product which is not distributed by us or which is not purchased from an authorized Kramer dealer. If you are uncertain as to whether a dealer is authorized, please contact Kramer at one of the agents listed in the Web site www.kramerelectronics.com.
2. Any product, on which the serial number has been defaced, modified or removed, or on which the WARRANTY VOID IF TAMPERED sticker has been torn, reattached, removed or otherwise interfered with.
3. Damage, deterioration or malfunction resulting from:

i) Accident, misuse, abuse, neglect, fire, water, lightning or other acts of nature

ii) Product modification, or failure to follow instructions supplied with the product

iii) Repair or attempted repair by anyone not authorized by Kramer

iv) Any shipment of the product (claims must be presented to the carrier)

v) Removal or installation of the product

vi) Any other cause, which does not relate to a product defect
vii) Cartons, equipment enclosures, cables or accessories used in conjunction with the product

WHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FOR

We will pay labor and material expenses for covered items. We will not pay for the following:

1. Removal or installations charges.
2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are the responsibility of the Kramer dealer from whom the product was purchased.
3. Shipping charges.

HOW YOU CAN GET WARRANTY SERVICE

1. To obtain service on you product, you must take or ship it prepaid to any authorized Kramer service center.
2. Whenever warranty service is required, the original dated invoice (or a copy) must be presented as proof of warranty coverage, and should be included in any shipment of the product. Please also include in any mailing a contact name, company, address, and a description of the problem(s).
3. For the name of the nearest Kramer authorized service center, consult your authorized dealer.

LIMITATION OF IMPLIED WARRANTIES

All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to the length of this warranty.

EXCLUSION OF DAMAGES

The liability of Kramer for any effective products is limited to the repair or replacement of the product at our option. Kramer shall not be liable for:

1. Damage to other property caused by defects in this product, damages based upon inconvenience, loss of use of the product, loss of time, commercial loss; or:
2. Any other damages, whether incidental, consequential or otherwise. Some countries may not allow limitations on how long an implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations and exclusions may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights, which vary from place to place.

NOTE: All products returned to Kramer for service must have prior approval. This may be obtained from your dealer.

This equipment has been tested to determine compliance with the requirements of:

EN-50081: "Electromagnetic compatibility (EMC);

generic emission standard.

Residential, co-partercial and light industry"

EN-50082: "Electromagnetic compatibility (EMC) generic immunity standard.

Part 1: Residential, commercial and light industry environment".

CFR-47: FCC* Rules and Regulations:

Part 15: "Radio frequency devices

Subpart B Unintentional radiators"

CAUTION!

Servicing the machines can only be done by an authorized Kramer technician. Any user who makes changes or modifications to the unit without the expressed approval of the manufacturer will void user authority to operate the equipment.
Use the supplied DC power supply to feed power to the machine.
Please use recommended interconnection cables to connect the machine to other components.

* FCC and CE approved using STP cable (for twisted pair products)

For the latest information on our products and a list of Kramer distributors, visit our Web site where updates to this user manual may be found.

We welcome your questions, comments, and feedback.

Web site: www.kramerelectronics.com

E-mail: [e-mail]

SAFETY WARNING

Disconnect the unit from the power supply before opening and servicing