AtlasIED FA42T-6MB 4-Feet In-Ceiling Coaxial Speaker Motorboard Assembly with 16W 70.7V/100V Transformer

The AtlasIED FA42T‑6MB is a coaxial 4″ loudspeaker motorboard assembly with integrated 70.7 V/100 V transformer designed to retrofit existing 6″ Strategy Series enclosures. It delivers clear, low-distortion audio with selectable taps and robust build quality, ideal for commercial audio installations.

Perfect for division-of-labor installations, it allows enclosure mounting before speaker installation. The motorboard’s identical footprint ensures seamless integration into FA97‑6 or FA95‑6 enclosures, maintaining low-frequency response and high output for background music or paging applications.

Key Features

• Coaxial 4″ driver: delivers balanced full-range sound in a compact form.
• Selectable transformer taps (1–16 W): provides flexibility for different SPL requirements.
• Front‑mounted tap switch: easy tuning without removing grille or ceiling access.
• Universal 6″ footprint: fits original Strategy Series enclosures for quick retrofit.
• UL 1480 listed: compliant for general signaling and life-safety systems.

Technical Specifications

• Model: FA42T‑6MB
• Dimensions: 7.0″ × 5.5″ (177.8 × 139.7 mm)
• Weight: 4.0 lb (1.81 kg)
• Speaker Type: 4″ coaxial driver with PEI dome tweeter
• Sensitivity: 88 dB avg.
• Frequency Response: 75 Hz–20 kHz ±7 dB
• Transformer taps: 1, 2, 4, 8, 16 W at 70.7/100 V; bypass for 8 Ω direct-coupled
• Dispersion: 130°
• Safety Listing: UL 1480 file UEAY.S1824
• Warranty: 5 years