FBT Install Keiron 4C B Black

The Keiron Series: A Compact and Demanding "Install" Approach

The FBT Install Keiron 4C B is part of the Keiron series, a range focused on installation where priority is given to integration, consistent performance, and ease of implementation. With its cubic format and black finish, it naturally blends into environments such as retail stores, cultural spaces, hotels, meeting rooms, or places of worship, while maintaining a precise sonic signature. Its Made in Italy design and plywood enclosure reinforce this concept: a compact speaker designed as a true professional audio tool.

Ideal Applications for the Keiron 4C B

This passive speaker is particularly suited for projects requiring close-range sound diffusion and clean output at controlled levels: background music, zone reinforcement, small rooms, corridors, reception areas, or voice diffusion for announcements and conferences. Thanks to its 91 dB sensitivity (1W/1m) and calibrated power, it easily fits into distributed systems. Its 90 degrees H x 90 degrees V dispersion facilitates placement to cover an area evenly without pronounced hot spots.

Design and Performance: The Efficiency of a 2-Way Coaxial

Coaxial Architecture: Coherence and Space Saving

The Keiron 4C B features a 2-way coaxial configuration, with a 4-inch (101.6 mm) driver and a 1-inch (25.4 mm) tweeter. The advantage of coaxial design in installations is twofold: on one hand, a more point-source-like origin that helps maintain good coherence between midrange and highs; on the other hand, a very compact overall format, practical when the speaker must remain visually discreet.

Low-Frequency Management in Installation: High-Pass Filter Recommended

With a frequency response from 100 Hz to 20 kHz, this speaker is optimized for clarity and intelligibility while remaining realistic on bass considering its size. To protect the driver excursion and improve level handling, a high-pass filter at 90 Hz - 24 dB/oct is recommended. The manufacturer also suggests using an external recommended filter: digital management with preset, a typical approach in refined installations where equalization and protection are centralized.

Power and Amplification: Simple Sizing

The Keiron 4C B is rated at 50 W RMS and 200 W Peak, with a recommended amplifier of 100 W RMS. This allows maintaining dynamic headroom while ensuring stable operation, especially in multi-zone distributed systems. Its max peak SPL of 114 dB aligns with its purpose: delivering comfortable and clean levels for small to medium-sized spaces or as supplementary diffusion.

Technical specifications

Bluetooth

No

Brand	FBT	Driver	4-inch diameter (101.6 mm), voice coil diameter 1.5 inches (38.1 mm)
Model	Install Keiron 4C B	Tweeter	1-inch diameter (25.4 mm), voice coil diameter 1 inch (25.4 mm)
Type	Passive speaker	Dispersion	90 degrees H x 90 degrees V
Manufacturer Reference	45382	Frequency response	100 Hz to 20 kHz
Series	Keiron	Sensitivity	91 dB (1W/1m)
Manufacturing	Italy	Max peak SPL	114 dB
Color	Black	Crossover frequency	3 kHz
Configuration	2-way coaxial	Recommended high-pass filter	90 Hz - 24 dB/oct
Recommended amplifier	100 W RMS	Recommended external filter	Digital management with preset
RMS power	50 W	Input connectors	Euroblock in & through
Peak power	200 W	Enclosure	plywood
Nominal impedance	16 ohms	Mounting	adjustable bracket sold separately (WM-45)