Alpha™ Siren Series
ALPHA12S
ALPHA12S
ALPHASL
ALPHASL
ALPHASL

ALPHA12S

ALPHA12S

ALPHASL

ALPHASL

ALPHASL

Alpha™ Siren Series
The Alpha Siren Series delivers up to 200 watts of auditory warning power in a compact design ideal for undercover and volunteer vehicles. Offering multiple warning tones, hands-free operation, and horn ring override capability, the Alpha Siren Series allows for flexible, effective control in emergency situations. With easy set-up and configuration using dip switches, it meets system requirements without special ordering, making it a convenient option for various applications. Whether used for traffic stops, pursuits, or crowd management, the Alpha Siren Series ensures reliable, adaptable performance.
ScanLock
Features
  • Compact, Versatile Design: Ideal for undercover, volunteer, or other applications not requiring radio repeat or PA functionality
  • Flexible Configuration: Easily adapt to local requirements without need for special orders
  • Harmonic Airhorn Tones: Produces harmonically rich composite tones for clear, commanding sound that cuts through noise
  • Dynamic Siren Control: Operate siren tones using the horn ring or auxiliary switches, providing flexible and responsive functionality
  • Tone Cycling Capability: Seamlessly cycles through 2 or 3 siren tones for enhanced warning effectiveness
  • ALPHA12S Model: Features a self-contained 100-watt siren with convenient DIP switch configuration for simplified setup
  • ALPHASL Model: Offers a remote 200-watt siren with advanced Scan-Lock™ programmability, enabling full tone customization
  • Control Options Available: Pair with Whelen’s ALPHA line of switches for tailored control and operation.
Specifications
Please note: Not all specifications will apply to every model. Consult your sales representative to confirm specs.
ALPHA12SALPHASL
Inputs/Outputs100-watt Output200-watt Output
SpeakersOperates (1) 100-watt SpeakerOperates (1) or (2) 100-watt Speakers
MicrophonesNo MicrophoneNo Microphone
TechnologyScan-Lock™: Advanced siren tone control
Hands-Free Operation
Scan-Lock™: Advanced siren tone control
Hands-Free Operation
TonesN/A20 Scan-Lock™ siren tones
ControlOperate siren tones using the horn ring or separate switchesOperate siren tones using the horn ring or separate switches
CustomizationSwitches Available:
ALPHA1 - Single Rocker On/Off
ALPHA2 - Single On/Off Plus Momentary for Airhorn
ALPHA3 - Tone 1/Off/Tone 2 Switch
ALPHA4 - Three Switch Operation
ALPHA5 - Three Position Toggle Switch
Switches Available:
ALPHA1 - Single Rocker On/Off
ALPHA2 - Single On/Off Plus Momentary for Airhorn
ALPHA3 - Tone 1/Off/Tone 2 Switch
ALPHA4 - Three Switch Operation
ALPHA5 - Three Position Toggle Switch
ConstructionOutput Protection: Open and short circuit protected
Easy Installation: Pre-wired with quick disconnect plugs for easy service and fast replacement
Output Protection: Open and short circuit protected
Easy Installation: Pre-wired with quick disconnect plugs for easy service and fast replacement
MountingBail Bracket, Spade fuse with in-line connector
ALPHA1-4 switches mount via included “L” bracket
Base Mount Flange, Spade fuse with PC board
ALPHA1-4 switches mount via included “L” bracket
Included Cables & Hardware6 pin amp Mate-N-Lok®, 24” (60.96 cm) wiring pigtail16 position input connector
CertificationsSAE Standards
SAE Class A
Regulatory Compliance
CA Title 13
Certifications applicable when paired with one Whelen 100-watt speaker
SAE Standards
SAE Class A
Regulatory Compliance
CA Title 13
Certifications applicable when paired with one Whelen 100-watt speaker
Warranty2-year2-year
Voltage12 VDC12 VDC
Amps8.0 (peak)15.0 (peak)
SizeHeight: 3.46” (8.79 cm)
Width: 6.90” (17.53 cm)
Depth: 4.62” (11.73 cm)
Weight: 2.2 lbs (1 kg)
Height: 2.25” (5.721 cm)
Width: 4.75” (12.07 cm)
Depth: 5.00” (12.70 cm)
Weight: 2.4 lbs (1.09 kg)
Alpha Siren Series

Alpha™ Siren Series
ALPHA12S
ALPHA12S

ALPHA12S

Self-Contained Siren with Faceplate Switches, Selectable Four Tone Hands-Free Siren, For Single 100-Watt Speaker
ALPHASL
ALPHASL

ALPHASL

Remote Siren, for Use with Remote Switches (Purchased Separately), Selectable Four Tone Hands-Free Siren, For One or Two 100-Watt Speakers
Optional Remote Switches for Alpha™ Siren Series
ALPHA1
Single On/Off Switch for Use with Hands-Free Operation
ALPHA2
Single On/Off Hands-Free Activation Plus Momentary Switch for Air Horn
ALPHA3
TONE 1/Off/TONE 2 Switch Operation Plus Momentary Switch for Air Horn
ALPHA4
Three-Switch Operation, One On/Off, One TONE 1/Hands-Free/TONE 2, One Momentary Switch for Airhorn
ALPHA5
3-Switch Toggle, Controls 3 Siren Tones and Other Warning Lights or Device Functions, Contacts Rated at 30 Amps