FBT Install Keiron 8S B Sub Black

The Keiron Series: An "Installation" Approach by FBT

The FBT Install Keiron 8S B belongs to the Keiron series, a range designed for sound integration projects where visual discretion and consistent sound quality are priorities: bars, restaurants, multipurpose rooms, cultural spaces, meeting rooms, or reception areas. The goal here is not to clutter the space with a bulky subwoofer, but to provide a controlled bass foundation that is easy to integrate into the existing system while maintaining a uniform sonic signature with speakers from the same family.

With its Italian manufacturing and installation-oriented format, this model aims for a clean implementation: simple positioning, convenient wiring via dedicated connectors, and use with external filtering to precisely tailor the crossover to your main speakers and the room acoustics.

Intended Uses and Users

This subwoofer is primarily aimed at installers, integrators, and operators who want to enhance bass impact without opting for an oversized solution. It is particularly relevant when you seek:

- an improvement in bass presence for background music and audiovisual content,
- a better sense of depth at moderate volume,
- discreet reinforcement complementing compact speakers, with the omnidirectional dispersion typical of a subwoofer.

As it is a passive subwoofer, it requires a suitable amplifier and external processing (crossover/filtering) to achieve controlled results. It is a wise choice when your installation already includes amplification, a processor, or an audio matrix capable of managing bandwidth and system protection.

Design and Implementation: Efficiency, Integration, Control

Clean Bass with External Filtering

The Keiron 8S B is designed to operate with an external crossover frequency. This approach allows precise adjustment of the integration between the subwoofer and satellite speakers, taking into account the venue's configuration (placement, number of speakers, zones, reverberation). The specified frequency response (42 Hz to 300 Hz) provides a clear baseline for creating coherent bass reinforcement without unnecessarily encroaching on the low midrange.

Installation-Friendly Connectivity

The Euroblock input connectors with In and Thru links facilitate daisy-chaining, practical in fixed installations where maintaining clean wiring and minimizing adapters is important. This connection logic suits technical racks and installations where maintenance and wiring clarity are as important as sound quality.

Compact Format and Mounting Options

Weighing 9.5 kg with a shallow depth, this subwoofer can be easily positioned according to site constraints. For specific installation needs, an adjustable mount is mentioned as sold separately (KR-W 8S), allowing adaptation of placement to the venue's architecture and chosen sound coverage plan.

Technical specifications

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Brand / Model	FBT Install Keiron 8S B	Max peak SPL	117 dB
Type	passive subwoofer	Dispersion	omnidirectional
Manufacturer reference	45385	Frequency response	42 Hz - 300 Hz
Series	Keiron	Driver	1.5 inch (38 mm) diameter, voice coil diameter 1.5 inch (38 mm)
Manufacturing	Italy	Crossover frequency	external
Color	black	Recommended high-pass filter	38 - 24 Hz - dB/oct
Configuration	1-way	Input connectors	Euroblock In and Thru
Recommended amplifier	300 W RMS	Cabinet material	plywood
RMS power	150 W	Mounting	adjustable mount sold separately (KR-W 8S)
Peak power	600 W	Dimensions	460 x 460 x 225 mm
Nominal impedance	8 ohms	Weight	9.5 kg
Sensitivity	89 dB