The FBT Subline 115SA is a professional active 15" subwoofer designed for portable and installed sound systems where deeper low-frequency... Read more
£1,025.00 Incl. VAT
Guaranteed secure & safe checkout.
The FBT Subline 115SA is a professional active 15" subwoofer designed for portable and installed sound systems where deeper low-frequency output, strong bass extension and reliable powered performance are required. Sitting above the compact 12" model in the Subline range, the Subline 115SA offers increased cabinet size, greater low-end depth and higher SPL capability, making it a strong choice for mobile DJs, live sound users, AV installers, venues, schools, houses of worship, bars, hospitality spaces, rehearsal rooms and event production teams.
Built around a 15" high-excursion woofer with a 3" voice coil, the Subline 115SA is designed to deliver controlled, powerful bass from a portable yet professional enclosure. The 1 way bass reflex design helps provide efficient low-frequency performance, with a frequency response of 38Hz to 140Hz at -6dB. This makes it suitable for reinforcing kick drum, bass guitar, DJ playback, electronic music, live performance, recorded music and general programme audio where a full-range loudspeaker on its own does not provide enough low-frequency impact.
The integrated 700W RMS Class D amplifier removes the need for a separate power amplifier, making the Subline 115SA easier to deploy in both portable and fixed systems. Peak amplifier power is listed at 1400W, giving the subwoofer the headroom required for dynamic bass performance in real-world applications. For mobile users, this reduces rack equipment and setup complexity. For installers, it provides a matched powered subwoofer solution that can be integrated into active loudspeaker systems without external amplifier matching.
With a maximum SPL of 132dB continuous and 135dB peak half-space, the Subline 115SA provides substantial output for a single 15" active subwoofer. It is well suited to compact PA systems where more low-end presence is required, particularly when paired with active full-range speakers from the FBT range. It can be used as the low-frequency foundation for small live sound systems, DJ rigs, school event systems, venue PA setups and portable AV packages.
The onboard DSP includes 8 presets, allowing the subwoofer to be configured for different system combinations and applications. This helps improve integration with FBT active top speakers and gives users a practical way to optimise the subwoofer for the room, speaker pairing and performance requirement. DSP-based setup is useful in mobile and fixed environments where the same subwoofer may be used with different loudspeakers or across different venues.
Balanced stereo XLR inputs and link outputs allow the Subline 115SA to sit neatly within a professional audio signal chain. The subwoofer can receive signal from a mixer, DSP, audio interface or loudspeaker management system, while the link outputs allow signal to be passed to additional loudspeakers or subwoofers. Volume control, phase inversion and selectable crossover filters are included, helping users align the subwoofer with the main loudspeaker system for a cleaner and more balanced result.
The cabinet is constructed from Baltic birch plywood with a scratch-resistant finish, giving it the durability required for professional use. This makes the Subline 115SA suitable for both regular mobile work and permanent installations where cabinet strength and long-term reliability matter. Ergonomic handles are built into the enclosure, making the subwoofer easier to handle during loading, positioning and pack-down.
An M20 top mount is included for pole mounting a full-range loudspeaker above the subwoofer. This is particularly useful for compact PA systems where a clean sub-and-top arrangement is required. With a suitable pole and compatible active speaker, the Subline 115SA can form the basis of a professional two-way sound system for events, presentations, school performances, hospitality venues and live music applications.
The FBT Subline 115SA measures 500 x 517 x 570mm and weighs 31.6kg. Transport dimensions are listed as 680 x 610 x 605mm, with a transport weight of 35kg. These details are important for customers planning storage, vehicle loading, venue access and handling requirements. Optional accessories listed by FBT include covers, wheel kits and compatible speaker stands, supporting both portable and installed use cases.
For customers looking for a professional active subwoofer with stronger bass extension than a compact 12" model, the FBT Subline 115SA is a capable and practical solution. With a 15" driver, 700W RMS Class D amplifier, 135dB peak SPL, onboard DSP presets, XLR input and link outputs, crossover control, phase inversion, birch plywood construction and M20 pole mount, it is well suited to portable PA systems, venue sound reinforcement and fixed AV installations requiring reliable low-frequency performance.
