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Speaker Accessory Type
Splitters, Switchers and Selectors
Load Type
Low Voltage - Relay
Free Standing
Relay Output Support
# of Relays
1 Relay
Maximum Power Handling
600 Watt
Normal State
Normally Open
Ease of Installation
Intermediate (Installs < 60 minutes)
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Automate Switching between Audio/Video Systems with a Voltage Activated Speaker Level Switching System
Niles Audio SPK-1 Speaker-Level A-B Switcher
Niles Audio SPK-1 Speaker-Level A-B Switcher
Niles Audio SPK-1 Speaker-Level A-B Switcher
Item# 6728
Price: $139.95
Free shipping on orders over $175 - See Details


  • 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 Audio devices such as APC-2, AC-3, AVS-2, SAS-1 or RFS-1
  • Premium nickel-plated five-way binding post connectors
  • Manufacturer Warranty: 2 year limited

Essential Info

The Niles Audio SPK-1 Speaker-Level A-B Switcher 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.

Please Note: This unit is not a Signal-Sensing Switcher; if signal-sensing is required use the SAS-1 or ABS-1, each sold separately.


More Info

The SPK-1 is designed primarily to be used as an expansion unit for the Niles Audio 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.


Speaker Level Power Handling: 600 Watts/channel continuous (RMS)
Connectors: Five-way speaker wire binding posts
Power Requirements: 12 volts DC at .1 Amp (100 milliamps)
Overall Dimensions: 6-13/16" wide x 3-1/8" high x 5-5/16" deep
Weight: 1-1/2 lbs.
Important notes:
Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
Manufacturer contact information: Niles Audio Corp, Tel: (305) 238-4373


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