
Kramer Electronics, Ltd. 
USER MANUAL 
Model: 
VS-81SP 
8 x 1 Loudspeaker Switcher 
 

Contents 
Contents 
1  Introduction  1 
2  Getting Started  1 
2.1  Quick Start  2 
3  Overview  3 
4  Your VS-81SP 8 x 1 Loudspeaker Switcher  3 
5  Installing the VS-81SP in a Rack  6 
6  Connecting the VS-81SP 8 x 1 Loudspeaker Switcher  7 
6.1  Connecting via RS-232  9 
6.2  Connecting via RS-485  9 
6.3  DIP-switch Settings  10 
6.3.1  Setting the MACHINE #  11 
6.3.2  Setting the MACHINE ADDRESS #  13 
6.4  Connecting the REMOTE Terminal Block Connector  15 
7  Operating the VS-81SP 8 x 1 Loudspeaker Switcher  17 
7.1  Using the Front Panel Buttons  17 
7.2  Using Serial Commands  17 
7.3  Operating via the Infrared Remote Controller  17 
8  Technical Specifications  18 
9  Upgrading the VS-81SP Firmware  18 
9.1  Downloading from the Internet  18 
9.2  Connecting a PC to the RS-232 Port  19 
9.3  Installing the Firmware  19 
10  Hex Table  25 
11  Kramer Protocol 2000  25 
 

Contents 
Figures 
Figure 1: VS-81SP 8 x 1 Loudspeaker Switcher Functions    4 
Figure 2: Connecting the VS-81SP – 1 Amplifier to 8 Speaker Pairs    8 
Figure 3: Connecting the VS-81SP – 8 Amplifiers to 1 Speaker Pair 
Figure 4: Connecting a PC Without Using a Null-modem Adapter 
Figure 5: Controlling via RS-485 
Figure 6: SETUP DIP-switches (Factory Default for Stan d-Alone MACHINE # 1)    10 
Figure 7: DIP-switch Settings on 4 VP-81SP Units 
Figure 8: Cascading 3 VP-81SP Units 
Figure 9: Addressing 3 Cascaded VP-81SP Units 
Figure 10: Connecting a Remot e Mechanical Switch er U nit to the VP-81SP    15 
Figure 11: Connecting a Remot e Unit to a Cascaded Set of Three VP-81SP Units 
Figure 12: Splash Scr een 
Figure 13: Atmel – Flip Window 
Figure 14: Device Selection Window 
Figure 15: Device Selection Window    21 
Figure 16: Loading the Hex 
Figure 17: RS-232 Window 
Figure 18: Atmel – Flip Window (Connected) 
Figure 19: Atmel – Flip Window (Operation Completed)    24
Tables 
Table 1: VS-81SP 8 x 1 Loudspeaker Switcher Functions    5 
Table 2: DIP-switch Definitions 
Table 3: MACHINE # DIP-switch Settings 
Table 4: MACHINE ADDRESS # DIP-switch Settings    13 
Table 5: VS-81SP Techn ical Specifications 
Table 6: VS-81SP Hex Table 
Table 7: Protocol Definitions 
Table 8: Instruction Codes for Protocol 2000    26
   8 
   9 
   10
   12 
   14 
   14
   16 
   20 
   20 
   21
   22 
   22 
   23
   11 
   11
   18 
   25 
   25
KRAMER: SIMPLE CREATIVE TECHNOLOGY 
 

Introduction 
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 o f our line, making the best even better! Our 
1,000-plus different models now appear in 11 groups 
defined b y function. 
Thank you for purchasing the Kramer VS-81SP 8 x 1 Loudspeaker  
Switcher, which is ideal for: 
•  Hi-fi retail stores 
•  Public address systems 
•  Home entertainment 
Each package includes the following items: 
•  The VS-81SP 8 x 1 Loudspeaker Switcher 
2
•  Null-modem adapter, a power cord
 and an infrared remote 
control transmitter (including the required battery and a separate 
user manual) 
•  Windows®-based Kramer control software 
3
•  This user man ual
1
 that are clearly 
2  Getting Started 
We recommend that you: 
•  Unpack the eq uipment carefully and save the original box and 
packaging materials for possible future shipment 
•  Review the contents of t his user man ual 
4
•  Use Kramer high-performance high-resolution cables
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; GR OUP 7: 
Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9: Room Conne ctivity; GROUP 10: Accessories 
and Rack Adapters; GROUP 11: Sierra Products 
2 We recommend that you use only the power cord supplied with this device 
3 Download up-to-date Kramer user manuals from our Web site at 
4 The complete list of Kramer cables is on our Web site at 
http://www.kramerelectronics.com 
http://www.kramerelectronics.com