Alpha Source 428 WR
2 x 8" Wide Application High Performance Passive Speaker
Product at a Glance
The British Acoustics Alpha Source 428 Aqua is a wide-application passive speaker built for premium performance in demanding indoor and outdoor environments. Featuring dual 8" LF drivers and a 1.7" HF compression driver, it delivers detailed, dynamic audio across varied setups. Its IP65-rated enclosure, crafted from marine-grade birch plywood with polyurea coating, offers superior protection against dust, water, and harsh weather. Perforated steel grills enhance durability and appearance, while rotatable horns, integrated handles, and M10 inserts ensure flexible installation. The Alpha Source 428 Aqua combines precision, ruggedness, and adaptability for professional audio systems in any environment.
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) : 100 Hz - 20 kHz
• Freq. Range (-10 dB) : 64 Hz - 20 kHz
• Rated Power : 800W AES, 3200W Peak
• H Dispersion : 160° (- 6 dB)
• V Dispersion : 40° (- 6 dB)
• Crossover : 1.7 kHz Passive
• Nominal Impedance : 4 Ω
• Max Output :Cont 127 dB, Peak 133 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
• 0820A-6LC- 8" Low Frequency Driver
• 2 Drivers connected in parallel
• 400W AES, 1600W Peak
• 2.5" Copper Voice Coil - Ferrite Magnet
• 3L Resistance Coating
• Minimal Power Compression with optimised
air-paths
• Aluminum Demodulation Ring for reduced
distortion
HF TRANSDUCER
• A3004 - 1.7" Exit HF Compression Driver
• 75W AES, 300W Peak
• 2.5" Voice Coil - Ferrite Magnet
• Alpha Contour Waveguide ensuring
consistent coverage
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
• See system chart for the System Accessories
SIZE
• Product: 342.9 x 469 x 325 mm (H x W x D)
• Product: 13.5 x 18.5 x 12.8 inch (H x W x D)
• Packed individually
WEIGHT
• Net : 18.6 Kgs
• Net : 39.69 Lbs
SHIPPING INFORMATION
• Carton Size
583 x 1273 x 837 mm (H x W x D)
23 x 50 x 33 inch (H x W x D)
• Gross Weight : 86.1 Kgs / 189.8 Lbs
• Packed : Individually
DOWNLOADS CENTRE
Datasheet Alpha Source 428 WR
DWG Drawing Alpha Source 428 WR
PDF Drawing Alpha Source 428 WR
