Alpha Source 428 Aqua
2 x 8" Wide Application High Performance Passive Speaker
Product at a Glance
The British Acoustics Alpha Source 428 Aqua is a top-tier wide-application passive speaker designed to deliver unparalleled performance in professional audio setups. Equipped with dual 8-inch low-frequency drivers and a 1.7-inch HF compression driver, it delivers dynamic and precise sound for a wide range of audio environments. The Alpha Source 428 Aqua is part of the Aqua Series, featuring an IP65 rating for robust resistance against water, dust, and harsh outdoor conditions, making it a reliable choice for both indoor and outdoor installations.
Its marine-grade birch plywood enclosure, combined with a granular scratch-free polyurea paint finish, ensures long-lasting durability and a refined aesthetic. The speaker’s perforated steel grills offer added protection while enhancing its professional appearance. With user-friendly features like rotatable horns, integrated handles, and M10 flying inserts, the Alpha Source 428 Aqua is engineered for versatile installation. Ideal for applications that demand precision and reliability, this speaker represents a seamless blend of performance, durability, and adaptability.
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 Subwoofers : See Systems
Chart for compatible subwoofers
• 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 deployed
horizontally or vertically with the correct
installation brackets or can be used as a
monitor
• Maximum permitted ambient temperature
(Ta max) 55° C (124° F)
• Minimum permitted ambient temperature
(Ta min): -20° C (-4° F)
IP SPECIFICATIONS
• Aqua Version : IP 65 - Offers greater
resistance against dust, water & corrosion
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
417.9 x 544 x 400 mm (H x W x D)
16.4 x 21.4 x 15.7 inch (H x W x D)
• Gross Weight : 19.53 Kgs / 43.06 Lbs
• Packed : Individually
DOWNLOADS CENTRE
Datasheet
CAD Files
GLL
