{"product_id":"fbt-subline-218sa-active-subwoofer","title":"FBT Subline 218SA Active Subwoofer","description":"\u003cp data-start=\"813\" data-end=\"1295\"\u003eThe FBT Subline 218SA is a professional active dual 18\" subwoofer designed for large-scale sound reinforcement applications where maximum low-frequency output, deep bass extension and touring-grade reliability are required. As the most powerful active model in the Subline range, it is built for demanding live sound, DJ, venue, touring, event production, theatre, club, hire and installation environments where a single compact subwoofer would not provide enough low-end authority.\u003c\/p\u003e\n\u003cp data-start=\"1297\" data-end=\"1844\"\u003eBuilt around a dual 18\" driver configuration, the Subline 218SA uses two high-excursion 18\" woofers with 3\" voice coils. This large-format bass system is designed to deliver strong impact, depth and clarity across the low-frequency range, making it suitable for kick drum, bass guitar, electronic music, live performance, club-style playback and high-energy event systems. FBT lists the Subline 218SA as a dual 18\" active subwoofer designed for the most demanding large-scale sound reinforcement applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1846\" data-end=\"2360\"\u003eThe cabinet uses a 1 way bass reflex configuration and delivers a frequency response of 30Hz to 100Hz at -6dB. This gives the Subline 218SA deeper low-frequency extension than the smaller active Subline models, making it a strong option for systems where physical bass impact and extended low-end performance are key requirements. In practical terms, it is well suited to larger rooms, live stages, outdoor events, production systems and venues where full-range loudspeakers need substantial low-frequency support.\u003c\/p\u003e\n\u003cp data-start=\"2362\" data-end=\"2947\"\u003ePower is provided by an integrated 1200W RMS Class D amplifier, with peak amplifier power listed at 2400W. This onboard amplification removes the need for separate subwoofer amplifier racks and simplifies deployment for portable and installed systems. The amplifier is matched to the dual 18\" driver system, helping deliver controlled bass output with clarity and definition. FBT specifies a maximum SPL of 137dB continuous and 140dB peak half-space, giving the Subline 218SA the output capability required for demanding professional applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2949\" data-end=\"3426\"\u003eThe integrated DSP provides 6 adjustable presets and crossover management, allowing the subwoofer to be configured for different system layouts and loudspeaker pairings. This is particularly useful when matching the Subline 218SA with FBT active top speakers or when adapting a system for different venues and event requirements. DSP-based control helps improve low-frequency integration and provides a more practical setup process than relying entirely on external processing.\u003c\/p\u003e\n\u003cp data-start=\"3428\" data-end=\"3874\"\u003eFor system alignment, the Subline 218SA includes level control, delay and phase switching. These tools are valuable when integrating one or more subwoofers with main loudspeakers, especially in larger rooms or stage environments where physical positioning may create timing or phase differences. Correct alignment can improve bass definition, reduce cancellation and help deliver a more consistent low-frequency response across the audience area.\u003c\/p\u003e\n\u003cp data-start=\"3876\" data-end=\"4412\"\u003eConnectivity is designed for professional audio systems, with balanced stereo XLR inputs and link outputs. This allows the subwoofer to sit cleanly within a standard live sound or installation signal chain. Audio can be fed from a mixing console, DSP processor, system controller or audio interface into the subwoofer, with link outputs available for additional loudspeakers, further subwoofers or system distribution. FBT lists the input connector as XLR IN\/OUT, with an input impedance of 22kOhm. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"4414\" data-end=\"4928\"\u003eThe cabinet is constructed from heavy-duty Baltic birch plywood with a scratch-resistant finish. This makes it suitable for touring, hire and production use where the subwoofer may be regularly transported, loaded, unloaded and used in demanding environments. Reinforced handles and rugged hardware are included to support professional handling. FBT also lists optional accessories including a nylon cover, nylon cover with wheels, speaker stands and a wheel kit with bracket. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"4930\" data-end=\"5414\"\u003eAn M20 top mount is included, allowing a compatible full-range loudspeaker to be pole-mounted above the subwoofer where appropriate. This supports practical sub-and-top system layouts for venues, live events and production applications, although the size and weight of the Subline 218SA mean transport, handling and positioning should be planned carefully. This is a professional dual 18\" cabinet, so it is best suited to users with appropriate logistics, storage and setup processes.\u003c\/p\u003e\n\u003cp data-start=\"5416\" data-end=\"5764\"\u003eThe Subline 218SA measures 970 x 661 x 670mm and weighs 83.5kg. Transport dimensions are listed as 1150 x 830 x 800mm, with a transport weight of 96.5kg. These figures are important for hire companies, production teams and venues planning vehicle loading, access routes, storage space and safe manual handling. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5766\" data-end=\"6196\"\u003eFor customers needing high-output low-frequency reinforcement, the FBT Subline 218SA provides a powerful active subwoofer solution with dual 18\" drivers, 1200W RMS amplification, 140dB peak SPL, DSP presets, crossover management, XLR connectivity and heavy-duty birch plywood construction. It is a strong choice for professional sound systems where deep bass, high output and dependable active subwoofer performance are essential.\u003c\/p\u003e","brand":"FBT Audio","offers":[{"title":"Default Title","offer_id":56657115611522,"sku":"38774","price":2495.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/5767\/2578\/files\/Subline218SA.png?v=1779117974","url":"https:\/\/www.theavbarn.co.uk\/products\/fbt-subline-218sa-active-subwoofer","provider":"The AV Barn","version":"1.0","type":"link"}