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White Room

Alpha Sub 428 S

Twin 18" Passive Subwoofer
Wall

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

ACOUSTIC

Frequency Response (-3 dB)

32 Hz - 190 Hz

Frequency Range (-10 dB)

Nominal Impedance

4 Ohms

Coverage Pattern

37 Hz - 200 kHz

Rated Power

Omni-directional

LF Driver

2000W Continuous, 8000W Peak

Maximum SPL

144 dB

2 x 18" Ultra Long Excursion ADR Drivers, 4" VC - Ferrite

Inputs

2 x Speak-on Connectors, Wired Parallel

Sensitivity

101.5 dB

AESTHETIC

Enclosure

Marine Birchwood Cabinet, Premium Grade

Grill

Perforated Stainless Steel Grill backed by acoustically transparent foam over a stainless steel mesh

Finish

British Acoustics' Signature Brown Finish

Mounting System

Integrated Handles - M-10 insertion points

DIMENSIONS

20"

Weight

82 Kgs

Depth

30"

Width

47.2"

Height

Anchor 1
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