An iconic fire truck siren
It's not a fire truck unless it's got a Q-Siren®. With more than 50 years of fire service tradition and history, the Federal Signal Q-Siren® (model Q2B®) is a beautifully streamlined, chrome-plated siren designed to provide unparalleled reliability for long-life operation. When mounted on a fire truck, the Q-Siren delivers powerful warning sound, more than any other electromechanical siren.  
Longer coast-down sound
A heavy-duty coaster clutch is standard on Q2B models. The unique coaster clutch design enables the siren to deliver longer coast-down sound once power is removed to reduce battery drain. The “worry free” clutch is subject to very little wear and requires no service attention or adjustments. Use the standard electric brake to quickly silence the siren.
Pedestal or recessed mounting
The Q-Siren is available in two Q2B models. The Q2B-P comes with a pedestal for bumper mounting and the Q2B-NN is designed for recessed mounting in the bumper. Both models are a compliment to the fire truck’s polished chrome bumper finish.
For flat and curved apparatus bumpers, a special bracket, the Q-MT is available. This rugged, durable mount is easy to install. Constructed of tough 3/8-inch steel, the Q-MT design protects the siren from the impact of rough roads
Hands-free operation
For increased convenience, the Q2FSK foot switch kit is also available. The kit comes with everything necessary to wire a footswitch to any Q2B model enabling the operator to power the siren “hands-free.”


Voltage 12VDC
Operating Current 100 amps
Output 123 decibels at 10-ft
Dim. (H x L x D) 10.5 in (26.7 cm) x 14.0 in (35.6 cm) x 10.0 in (25.4 cm)
Shipping Weight 49 lb


Audible Equipment may produce LOUD sounds necessary to request the right-of-way. Audible equipment may cause hearing damage. Wear hearing protection. Refer to the Installation Manual or call 800/433-9132 for further instructions.

Important Warning for Police Boats and Fire Rescue Boats

It has come to our attention that police boat and fire rescue boat sirens and speakers may subject persons operating those craft to sound pressure levels that can cause permanent hearing loss. We recommend that speakers be located as far forward on the boat as possible, as recommended in the SAE Recommended Practice J1849 "Emergency Vehicle Sirens". However, unprotected exposures of a sufficient duration to properly located siren speakers can still create a risk of hearing loss.

It is our recommendation that your siren speakers should be relocated and persons operating these craft should wear hearing protection when using the siren system.

Failure to comply with these recommendations may result in temporary or permanent hearing loss to operators and passengers of these vehicles.

Ordering Information

Model Types
Model Description
Q2B-012NNSD Q2B, mechanical siren, Chrome, recess mount
Q2B-012PSD Q2B, mechanical siren, Chrome, pedestal mount
Product # Description
Q2FSK Kit, Q2B, foot switch
Q-MT Kit, Q2B, bracket for recess mounting Q2B siren
Replacement Parts
Description Part Number
BRAKE ASSY,12V Z8280B003J-02