Alpha Sub 418 S WR
18" Passive Subwoofer
Product at a Glance
The British Acoustics outdoor subwoofer is designed for long-lasting low-frequency reinforcement in harsh environments. Featuring our signature ultra-low distortion woofer, it delivers powerful and precise bass while withstanding dust, splashes, and UV exposure. Ideal for system designers adding LF extension to outdoor installations, its sealed terminals and double dura-coated grille ensure durability, even in coastal conditions. The rugged enclosure offers reliable performance in all-weather setups, making it a dependable choice for resorts, stadiums, and public outdoor spaces. Built for both performance and protection, this subwoofer combines clarity, strength, and resilience in challenging outdoor applications.
CRAFTSMANSHIP
Painstakingly Perfect Production
Over the years, craftsmanship has been closely linked with small scale individualistic production. Back in 1972, we started the same way. As we grew in scale & size, it was difficult to build each speaker individually, but quality control was of utmost importance as so switching to a general assembly line was simply not an option. So we wrote up a code, one quite like enigma, to ensure quality control. We selected the right partners, got the right tools, and in cases where those weren't available, we invented them. We grew slower than most as our aim was to last longer than most.
TECHNICAL SPECIFICATIONS
ACOUSTICAL SPECIFICATIONS
• Freq. Response (-3 dB) : 34 Hz - 800 Hz
• Freq. Range (-10 dB) : 41 Hz - 200 kHz
• Rated Power : 1200W AES, 4800W Peak
• Omni-directional Coverage
• Cardioid presets available
• Nominal Impedance : 8 Ω
• Crossover : 80 - 120 Hz Active
• Max Output : Cont 129 dB, Peak 135 dB
• 2 x Speak-On Sockets, Input & Thru
SYSTEM SPECIFICATIONS
• Recommended System Control : Delta Drive
DSP Control Systems
• Recommended Amplifiers : See Amplifier
load calculation chart
LF TRANSDUCER
• 18" Low Frequency Long Excursion Driver
• 1200W AES, 4800W Peak
• 4" Copper Voice Coil - Ferrite Magnet
• 3L Resistance Coating
• Minimal Power Compression with optimised air-paths
• Aluminum Demodulation Ring for reduced distortion
HOUSING
• Marine Birchply Enclosure
• Granular Scratch Free Polyurea Paint
• Perforated Black, Pressed Steel Grills
• Integrated Handles on Either Side
• Includes a set of round bottom feet for
secure and stable stacking
• Sloped Input Plates
• M10 Flying inserts
• Installation brackets : Alpha Throne (H),
Alpha Throne (V), Alpha Yoke B410
AESTHETIC SPECIFICATIONS
• British Acoustics Signature Umber Brown
tone
• Blue Decals on Grills for better Aesthetics
• Available in a RAL code of your choice (24
nos, minimum)
OPERATING PARAMETERS
• Operating positions: Can be used
horizontally or vertically and can be used as
a stack of subs
• Maximum permitted ambient temperature
(Ta max) 55° C (124° F)
• Minimum permitted ambient temperature
(Ta min): -20° C (-4° F)
IP SPECIFICATIONS
• WR Version : IP 54 - Offers greater
resistance against dust & water
OPTIONAL ACCESSORIES
• ACC-M10 : M10 Eye Bolt
• ACC-PM S: Threaded Subwoofer Pole
Mount
• ACC-4DC : Set of 4 Castor Wheels
• ACC-SWC418 - Nylon Cover for Subwoofer
SIZE
• Product: 530 x 655 x 772 mm (H x W x D)
• Product: 20.9 x 25.8 x 30.4 inch (H x W x D)
• Packed individually
WEIGHT
• Net : 50.3 Kgs
• Net : 110.9 Lbs
SHIPPING INFORMATION
• Carton Size
605 x 730 x 847 mm (H x W x D)
23.8 x 28.7 x 33 inch (H x W x D)
• Gross Weight : 52.8 Kgs / 116.4 Lbs
• Packed : Individually
DOWNLOADS CENTRE
Datasheet Alpha Sub 418 S WR
DWG Drawing Alpha Sub 418 S WR
PDF Drawing Alpha Sub 418 S WR
