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Alpha Blu 408

08" Blu-Series Performance Installation Speaker
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Product at a Glance

The Alpha Blu 408 from British Acoustics' 4 Series is an 8" Blu-Series performance installation speaker designed for premium audio quality and enhanced aesthetics. With a frequency response of 60 Hz to 20 kHz (-3 dB) and a frequency range of 52 Hz to 20 kHz (-10 dB), it ensures accurate and comprehensive sound reproduction. Rated for 400W AES (1600W peak) at 8 ohms impedance, it achieves a maximum SPL of 122 dB with a sensitivity of 93 dB. The speaker features an 8" ADR Alpha Range LF driver with a 3" voice coil and a 1.34" high-frequency compression HF driver with a 2.5" voice coil, crossed over at 1.8 kHz or bi-amplified for versatility. Its coverage pattern is 90° x 50°, suitable for a variety of installation applications. Housed in a premium marine birchwood cabinet with a perforated stainless steel grill backed by acoustically transparent foam over a stainless steel mesh, it features British Acoustics' signature brown finish for added elegance. The Alpha Blu 408 includes integrated handles and M-10 insertion points for easy installation and handling. It measures 18.5" in height, 9" in width, 11.0" in depth, and weighs 10.6 kg.


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. 

Tech Specs



Frequency Response (-3 dB)

60 Hz - 20 kHz

Frequency Range (-10 dB)

52 Hz - 20 kHz

Rated Power

400W AES, 1600W Peak

Maximum SPL

122 dB


93 dB



Nominal Impedance

8 Ohms

Coverage Pattern

90° x 50°


Marine Birchwood Cabinet, Premium Grade


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

LF Driver

8" ADR Alpha Range Drivers, 3" VC - Ferrite

HF Driver

1 x 1.34" high-frequency compression driver, 2.5" VC


British Acoustics' Signature Brown Finish

Mounting System

Integrated Handles - M-10 insertion points

Crossover Frequency

1.8 kHz or Bi-amplified









10.6 Kgs

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We have a growing network of channel partners

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