106509-012-4A0001 – Alto Aviation P-12 4 Ohm 2.5" TSO Page Speaker
Available now for sale or service on the Aerospace Audio Marketplace.
Overview Section
The Alto Aviation 106509-012-4A0001, part of the P-12 series, is a high-performance, compact Passenger Address (PA) and Page Speaker designed specifically for the cabin interior of business jets and commercial aircraft. This 2.5-inch speaker is engineered to provide high-fidelity voice reproduction and background music in a small form factor that integrates seamlessly into cabin valances, headliners, and side panels.
The designation 106509-012-4A0001 identifies several critical technical traits: its 4 Ohm impedance, its specialized TSO-C139 certification for airborne acoustic equipment, and its specific mounting and connector configuration. Alto Aviation is the industry leader in premium cabin audio, and the P-12 is known for maintaining clarity and high sound pressure levels (SPL) without the distortion common in smaller, non-aviation speakers.
Key Features Section
TSO-C139 Certified: Fully approved for installation in transport-category aircraft, meeting strict FAA requirements for environmental testing, fire safety, and acoustic performance.
4 Ohm High-Efficiency Voice Coil: Optimized for modern digital audio amplifiers to deliver maximum output with minimal power consumption.
Compact 2.5-inch Profile: Extremely shallow mounting depth and small diameter allow for installation in constrained cabin spaces where traditional speakers cannot fit.
Neodymium Motor Structure: Utilizes high-strength magnets to provide superior acoustic energy and transient response while significantly reducing the weight of the assembly.
Extended Frequency Response: Tailored specifically for voice intelligibility, ensuring that safety announcements and cockpit-to-cabin pages are heard clearly throughout the cabin.
Moisture-Resistant Cone: Constructed with advanced materials designed to withstand the humidity and temperature cycles of high-altitude flight.
Technical Specifications Section
Part Number: 106509-012-4A0001
Model Designation: P-12 Series Page Speaker
OEM Manufacturer: Alto Aviation
Diameter: 2.5 inches (64 mm)
Impedance: 4 Ohms
Power Handling: 10 Watts Continuous / 20 Watts Peak (Nominal)
Frequency Response: 200 Hz – 15 kHz (Optimized for Voice/PA)
Sensitivity: High SPL output for effective paging in high-ambient-noise cockpits/cabins.
Certification: TSO-C139
Weight: Approximately 4.2 ounces (120 grams)
Mounting: Flange-mounted for secure installation in cabin panels.
Aircraft Compatibility Section
Business Aviation (Bizjets): Standard equipment on Gulfstream, Bombardier Global/Challenger, Dassault Falcon, and Cessna Citation platforms.
Regional and Commercial Transport: Used in VIP configurations and standard passenger cabins for PA/CI (Passenger Address/Cabin Interconnect) systems.
Rotary Wing: Ideal for EMS and Law Enforcement helicopters where high-clarity paging is required in noisy environments.
Note: The 106509-012-4A0001 is an airborne electronic component. The aircraft Illustrated Parts Catalog (IPC) or Avionics Wiring Diagram is the final authority for verifying the quantity and placement of speakers in the cabin audio loop.
Applications Section
Passenger Address (PA) Systems: The primary output device for "Fasten Seatbelt" chimes and flight attendant announcements.
Cockpit-to-Cabin Paging: Reliable reproduction of pilot instructions to the cabin crew.
Cabin Entertainment (IFE): Used as a distributed background music (BGM) speaker in smaller cabin zones or lavatories.
Why Choose the 106509-012-4A0001?
The 106509-012-4A0001 is a flight-safety critical audio component. In an emergency, the intelligibility of cabin announcements is paramount. Using a commercial-grade speaker instead of a TSO-certified Alto speaker risks: 1) Acoustic Failure: Inability to overcome engine noise during a critical page; 2) Fire Hazard: Non-aviation materials may not meet the strict FAR 25.853 flammability requirements; and 3) Magnetic Interference: Improperly shielded magnets can interfere with sensitive cockpit navigation instruments. Choosing the TSO-certified P-12 ensures that your cabin audio system remains compliant and provides crystal-clear communication in all flight conditions.
The technical advantage of the 106509-012-4A0001 lies in its acoustic tuning for voice intelligibility. Aircraft cabins present a unique challenge due to constant low-frequency engine drone. Alto Aviation engineers the P-12 with a specific "crossover" profile that emphasizes the 1 kHz to 4 kHz range, where human speech is most distinct. By focusing the 10W power handling in this spectrum, the speaker "cuts through" ambient noise without needing excessive volume. Furthermore, the 4 Ohm impedance allows for efficient power transfer from modern Class-D amplifiers, minimizing heat dissipation behind cabin panels—a critical factor for long-term component reliability.
Note: The 106509-012-4A0001 is an avionics component. Installation should be performed by a certified technician. Ensure the speaker is phase-matched with other speakers in the cabin loop to prevent "dead spots" or acoustic cancellation. Use only approved aerospace-grade wire for installation.
Documentation
Alto Aviation P-12 Installation Manual: Contains detailed mounting footprints and wiring pin-outs.
RTCA DO-160G Compliance Data: Detailing the environmental and EMI/RFI testing passed by this unit.