Niles SPK-1 Owner's Manual

I N S T A L L A T I O N G U I D E

F O R AUTO M AT E D SWITC H ING BE T WEEN A U D IO/VI D E O SYS T E MS

V O LTA G E A C T I VA T E D S P E A K E R L E V E L S W I T C H I N G S Y S T E M

SPK-1

CONGRATULATIONS!

Thank you for choosing the SPK-1 Speaker Level Switching System from Niles. With proper
installation and operation, you should enjoy years of trouble-free use.

Niles manufactures the industry’s most complete line of custom installation components and
accessories for audio/video systems. To see the complete Niles product assortment, visit us on
the Internet at: www.nilesaudio.com.

TABLE OF CONTENTS

Introduction 1

Features 2

Installation 3

Specifications 6

Warranty 8

Warranty Registration Card 9

INTRODUCTION

The SPK-1 is a two channel, speaker level A-B switch. The SPK-1 can be used to switch amplifiers,
speakers, surround sound systems, or any application where a voltage-activated speaker-level switch
is preferred.

Applying 12 volts DC to the control input connector activates the switch. A control output connector
is also provided. The control output is internally connected in parallel with the SPK-1’s control input.
The control output can be used to control additional SPK-1’s by “daisy-chaining” the control output of
one unit to the control input of the next. Connecting two SPK-1’s together enables you to switch four
channels of speaker-level signals and connecting three units together lets you switch six channels,
and so on. A maximum of 6 SPK-1’s may be connected together in this manner.

The control output can also be used to connect other Niles switching devices such as the AC-3
Voltage Activated AC outlet and the AVS-2 Voltage Activated Line-Level Switch.

The SPK-1 is designed primarily to be used as an expansion unit for the Niles SAS-1 Signal Activated
A-B Switch. The SAS-1 is an automatic A-B switch designed to replace manually operated A-B
switches. It automatically switches from A to B when a signal is present at input B. The SAS-1 can
switch any combination of line-level audio, speaker-level audio and composite video signals. Using its
control out connector, the SAS-1 can be used as the “master” unit which activates other “slave” units
such as the SPK-1, AVS-2 and AC-3. Please refer to www.nilesaudio.com for more information on
these and other Niles switching systems available.

NILES AUDIO CORPORATION – 1-800-BUY-HIFI

1

FEATURES

• Replaces manually operated A-B switches

• Audio power handling: 600W per channel

• SPK-1 is activated by 12Volt DC signal (100mA minimum)

• Requires 12Volt DC adapter to trigger SPK-1 from the switched outlet of a receiver or
preamp, can also be triggered by the 12Volt output of a Niles APC-2, AC-3, AVS-2,
SAS-1 or RFS-1

• 12Volt control output for activating other Niles devices such as an APC-2, AC-3, AVS-2,
SAS-1 or RFS-1

• Note: This unit is not a Signal-Sensing Switcher; if signal-sensing is required use the
SAS-1 or ABS-1

• Premium nickel-plated five-way binding post connectors

• Two-year limited warranty

2