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Alpha Blu 415

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

The Alpha Blu 415 from British Acoustics' 4 Series is a 15" Blu-Series performance installation speaker designed to deliver superior sound quality and aesthetics. With a frequency response of 38 Hz to 18 kHz (-3 dB) and a frequency range of 33 Hz to 20 kHz (-10 dB), it ensures accurate and full-range audio reproduction. Rated for 750W continuous power (3000W peak) at 8 ohms impedance, it achieves a maximum SPL of 134 dB with a sensitivity of 96 dB. The speaker features a 15" ADR Alpha Range LF driver with a 4" voice coil and a 1.5" exit compression HF driver with a 3" voice coil, crossed over at 2.1 kHz or bi-amplified. Its coverage pattern is 90° x 50°, suitable for various 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 boasts British Acoustics' signature brown finish for added elegance. The Alpha Blu 415 includes integrated handles and M-10 insertion points for easy installation and handling. It measures 30.8" in height, 16.5" in width, 19.8" in depth, and weighs 27.2 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)

38 Hz - 18 kHz

Frequency Range (-10 dB)

33 Hz - 20 kHz

Rated Power

750W Continuous, 3000 Peak

Maximum SPL

134 dB


96 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

15" ADR Alpha Range Drivers, 4" VC - Ferrite

HF Driver

1.5" exit compression driver, 3" VC


British Acoustics' Signature Brown Finish

Mounting System

Integrated Handles - M-10 insertion points

Crossover Frequency

2.1 kHz or Bi-amplified









27.2 Kgs

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