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Alpha Sub 418 S

18" Passive Subwoofer

Product at a Glance

Dust, Splash & UV-resistant
Built with our signature Ultra-low distortion woofer
Allows systems designers to add LF extensions to outdoor installations
Double dura-coated grille for costal use
Sealed terminals to enhance durability

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)