Kramer VS-406 User manual

Kramer Electronics, Ltd.
Preliminary
USER MANUAL
Model:
VS-406
Audio Selector/Amplifier

Contents
i
Contents
1Introduction 1
2Getting Started 1
2.1 Quick Start 2
3Overview 3
4Your VS-406 Audio Selector/Amplifier 3
5Installing the VS-406 in a Rack 5
6Connecting and Operating the VS-406 6
6.1 Optional Gain Adjustment 8
7Technical Specifications 9
Figures
Figure 1: VS-406 Audio Selector/Amplifier 4
Figure 2: Connecting the VS-406 Audio Selector/Amplifier 7
Figure 3: Adjusting the Gain DIP-Switches 8
Tables
Table 1: VS-406 Audio Selector/Amplifier Functions 4
Table 2: VS-406 Technical Specifications 9

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
Thank you for purchasing the Kramer VS-406 Audio Selector/Amplifier,
which is ideal for:
that are clearly
defined by function.
•Audio broadcast and production studios
•Hi-fi retail stores
Each package includes the following items:
•The VS-406 Audio Selector/Amplifier
•Power supply (24V DC) and rack “ears”
•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 high-resolution 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 our Web site at 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
Getting Started
2
2.1 Quick Start
This quick start chart summarizes the basic setup and operation steps.

Overview
3
3
3 Overview
The VS-406 is a switcher/amplifier for unbalanced analog audio stereo
signals. The unit mechanically switches the single line input to one output,
either one of ten unpowered unbalanced audio stereo line outputs, or one of
six amplified speaker outputs. The unit does not switch to line and speaker
outputs simultaneously.
More specifically, the VS-406 features:
•Unpowered 1x10 mechanical line to line switching
•Amplified 1x6 line to speaker switching
•A loudspeaker volume knob
•A power ON indication LED
•A 24V DC power supply
•Standard 19” 1 U rack mount size
To achieve the best performance:
•Use only good quality connection cables1
•Avoid interference from neighboring electrical appliances that may
adversely influence signal quality and position your Kramer VS-406
away from moisture, excessive sunlight and dust
to avoid interference,
deterioration in signal quality due to poor matching, and elevated noise
levels (often associated with low quality cables)
4 Your VS-406 Audio Selector/Amplifier
Figure 1 and Table 1 define the unit.
1 Available from Kramer Electronics on our Web site at http://www.kramerelectronics.com

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your VS-406 Audio Selector/Amplifier
4
Figure 1: VS-406 Audio Selector/Amplifier
Table 1: VS-406 Audio Selector/Amplifier Functions
#
Feature
Function
1 ON LED Illuminates green when receiving power
2 LINE OUT SELECTOR Buttons Press to choose the output line (1 to 10)
3 LOUDSPEAKER OUT SELECTOR Buttons Press to choose the output speaker pair (11 to 16)
4 LOUDSPEAKER VOLUME Knob Turn to adjust the volume level of the selected speakers
5 OUT (SPKR) (L+, L-, R+, R-) Terminal Blocks Connect to the stereo speaker pairs (11 to 16)
6 LINE INPUT (L, R) RCA Connectors Connect to the unbalanced audio stereo line source
7 LINE OUTPUT (L, R) RCA Connectors Connect to the unbalanced audio stereo acceptors (1 to 10)
8 24V DC Connector +24V DC for powering the unit

Installing the VS-406 in a Rack
5
5
5 Installing the VS-406 in a Rack
This section provides instructions for rack mounting the unit.

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Connecting and Operating the VS-406
6
6
6 Connecting and Operating the VS-406
To connect the VS-406, as shown in Figure 2, do the following1
1. Connect an unbalanced stereo audio source (for example, a stereo audio
player) to the LINE INPUT L and R RCA connectors.
:
2. Connect the LINE OUTPUT RCA connectors to up to 10 unbalanced
stereo audio acceptors (for example, stereo audio recorders).
3. Connect the OUT (SPKR) connectors to up to 6 speaker pairs (use only
passive, unpowered speakers).
4. Connect the 24V DC power supply.
To operate the VS-406:
1. Press the appropriate button on the LINE OUT SELECTOR (from 1 to
10) or the LOUDSPEAKER OUT SELECTOR (from 11 to 16).
The line input switches to the selected line output or speaker.
2. Adjust the speaker volume by turning the LOUDSPEAKER VOLUME
knob.
Note: The power supply is only needed when operating loudspeakers.
No power is needed for line switching.
1 Switch OFF the power on each device before connecting it to your VS-406. After connecting your VS-406, connect its
power and then switch on the power on each device

Connecting and Operating the VS-406
7
7
Figure 2: Connecting the VS-406 Audio Selector/Amplifier

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Connecting and Operating the VS-406
8
8
6.1 Optional Gain Adjustment
You can set the overall gain of the loudspeaker outputs by adjusting the
gain DIP-switches located on the circuit board inside the VS-406. Settings
available are 26dB, 32dB, 38dB (factory default setting) and 42dB.
To set the gain DIP-switches:
1. Remove the screws from the top and sides that hold the top cover.
2. Remove the top cover to access the circuit board.
3. Using a small screwdriver or pointed object, slide the DIP-switches to
set the desired gain (see Figure 3).
4. Replace the top cover and secure with the screws removed as per Step 1
above.
OFF
Rear Side
Front Side
ON
26dB 38dB 42dB
32dB
Factory
Setting
ON
ON
ON
ON
OFF
26dB (x10)
32dB (x20)
38dB (x40)
42dB (x63)
OFF OFF
OFF OFF OFF
ON ON ON
Figure 3: Adjusting the Gain DIP-Switches

Technical Specifications
9
9
7 Technical Specifications
The VS-406 technical specifications are shown in Table 2:
Table 2: VS-406 Technical Specifications1
INPUTS: 1 unbalanced stereo audio on RCA connectors
OUTPUTS: 6 powered speakers on springed terminal blocks;
10 line level unbalanced audio stereo on RCA connectors
INPUT SENSITIVITY: 0.5Vpp @38dB total gain
MAXIMUM OUTPUT LEVEL: 40Vpp @10% THD + N, 33W/channel, 8Ω full load
MAX. VOLTAGE GAIN: +38dB
BANDWIDTH (-3dB): 20kHz
S/N RATIO: 74dB @10% THD + N
CONTROLS: Volume level range: -51dB to 38dB (internal gain switches are
set to 38dB)
COUPLING: Input – AC, output – DC
AUDIO THD + NOISE: 0.2% @ 2W into 8Ω
AUDIO 2nd HARMONIC: 0.16% @ 2W into 8Ω
AMPLIFIER TYPE: Class D
POWER SOURCE: 24V DC, 3.6A
DIMENSIONS: 19” x 4.0” x 1U
WEIGHT: 1kg (2.2lbs)
ACCESSORIES: Power supply, rack “ears”
1 Specifications are subject to change without notice

KRAMER: SIMPLE CREATIVE TECHNOLOGY
10
10
LIMITED WARRANTY
WHO IS PROTECTED?
WHAT IS COVERED AND WHAT IS NOT COVERED
WHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FOR
HOW YOU CAN GET WARRANTY SERVICE
LIMITATION OFIMPLIED WARRANTIES
EXCLUSION OF DAMAGES
CAUTION!
Kramer Electronics (hereafter ) warrants this product free from defects in material and workmanship under the
following terms.
Kramer
HOW LONG IS THE WARRANTY
Labor and parts are warranted for seven years from the date of the first customer purchase.
Only the first purchase customer may enforce this warranty.
We will pay labor and material expenses for covered items.We will notpay for the following:
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:
This warranty gives you specific legalrights, andyou may also have other rights, which varyfrom place to place.
All products returned to Kramer for service must have prior approval. This may be obtained from your dealer.
This equipment has been tested todetermine compliancewith therequirements of:
EN-50081: "Electromagnetic compatibility(EMC);
generic emission standard.
Residential, commercial and lightindustry"
EN-50082: "Electromagnetic compatibility(EMC) generic immunity standard.
Part 1: Residential, commercialand lightindustryenvironment".
CFR-47: FCC* Rules and Regulations:
Part 15: “Radio frequency devices
Subpart B Unintentional radiators”
Except as below, this warranty covers all defects in material or workmanship in this product. The following are not covered
by the warranty:
1. Any product which is not distributed by Kramer, 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
TAMPERED sticker has been torn,
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 tothe 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 usedin conjunctionwiththe product
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.
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.
All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to
the length of this warranty.
1. Damage to other property caused by defects inthis product, damages basedupon inconvenience, loss ofuseof theproduct, loss
of time, commercialloss; 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 andexclusions maynot applyto you.
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.
IF reattached, removed or otherwise interfered with.
* FCC and CEapproved using STPcable (for twisted pair products)
NOTE:
Part 1:

Kramer Electronics, Ltd.
Web site: www.kramerelectronics.com
E-mail: [e-mail]
P/N: 2900-000714 REV 1
For the latest information on our products and a list of Kramer
distributors, visit our Web site: www.kramerelectronics.com
where updates to this user manual may be found.
We welcome your questions, comments and feedback.
Caution
Safety Warning:
Disconnect the unit from the power supply before
opening/servicing.