FBT KEIRON 8S Black 8" Passive Subwoofer 300W RMS

The FBT KEIRON 8S Black is a compact and refined passive subwoofer engineered for elegant indoor installation environments. Part of the KEIRON Install series, it features a sleek, scratch-resistant painted plywood cabinet and offers deep, powerful bass extension for KEIRON and CANTO speaker systems. Designed for installations where aesthetic discretion and performance are equally important, the KEIRON 8S delivers a frequency response of 42Hz–300Hz, making it ideal for enhancing both music and speech applications.

This model features an 8" high-excursion woofer with a 1.5" voice coil and can reach a maximum SPL of 117dB, powered by an external amplifier rated at 300W RMS. It does not include an internal passive crossover and requires external signal processing. Euroblock input and thru connectors make installation flexible, and dedicated brackets (optional) allow for flush wall-mounting. The subwoofer is equally at home on the ground with its removable feet or fixed on a wall.

Features
Ultra-compact passive subwoofer for discreet indoor installations
High excursion 8" woofer with 1.5" voice coil
300W RMS recommended amplifier power
Omnidirectional dispersion pattern
Elegant birch plywood enclosure with scratch-resistant paint
Optional wall-mounting bracket for flexible installation
Euroblock 4-pin input and thru connectors
Removable ground feet
Available in black and white finish
No internal crossover – external DSP required

Specifications
Configuration: Single-driver subwoofer
Frequency Response: 42Hz – 300Hz (-6dB)
Low Frequency Woofer: 8" (1.5" voice coil)
Maximum SPL (Continuous/Peak): 114dB / 117dB
Dispersion: Omnidirectional
Crossover Frequency: External only
Recommended HP Filter: 38Hz, 24dB/Oct
Recommended Amplifier Power: 300W RMS
Long Term Power Handling: 150W
Short Term Power Handling: 600W
Sensitivity (@1W/1m): 89dB
Impedance: 8 Ohm
Input Connector: 4-pin Euroblock (In & Thru)
Net Dimensions (W x H x D): 390 x 190 x 390 mm
Net Weight: 8 kg
Transport Dimensions (W x H x D): 460 x 225 x 460 mm
Transport Weight: 9.5 kg