Delta 975
Dual 15", 2-Way FOH Speaker
Product at a Glance
The British Acoustics Delta 975 is a versatile dual 15" full-range speaker engineered for professional audio applications, delivering impactful sound with exceptional clarity and coverage. Ideal as a standalone PA system or side-fill for live performances, it features dual 15" woofers that provide deep, punchy bass and a 1.75" exit, 4" voice coil HF driver with an 80° x 50° horn for precise mid-high frequency dispersion. Its rugged enclosure combines durability with a professional aesthetic, making it suitable for both touring and fixed installations. The Delta 975’s full-range capability often eliminates the need for additional subwoofers, offering a balanced blend of high output and efficient coverage. With powerful performance, robust construction, and finely tuned acoustics, it stands as a reliable and versatile choice for audio professionals seeking top-tier sound reinforcement.
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) : 50 Hz - 19 kHz
• Freq. Range (-10 dB) : 37 Hz - 20 kHz
• Rated Power : 1600W AES, 6400W Peak
• H Dispersion : 90° (- 6 dB)
• V Dispersion : 50° (- 6 dB)
• Nominal Impedance : 4 Ω
• Crossover : 1.3 kHz Passive
• Max Output : Cont. - 131dB, Peak - 137 dB
• 2 x Speak-on terminals, Input & Thru
SYSTEM SPECIFICATIONS
• Recommended Subwoofers : See Systems Chart for compatible subwoofers
• Recommended System Control : Delta 48 , Delta 98 FIR , PW 6
• Recommended Amplifiers : See Amplifier load calculation chart
LF TRANSDUCER
• 1540F - 15” Low Frequency Driver
• Two Drivers Connected in Parallel
• 750W AES, 3000W Peak
• 4” Voice Coil - Ferrite Magnet
• Motor, Suspension & Circulation optimised
by FEM
• Fortex™ Weather Resistant Cones
HF TRANSDUCER
• 275F - High Frequency Compression Driver
• 100W AES, 400W Peak
• 3” Voice Coil - Ferrite Magnet
• FEM Optimised Motor & Diaphragm
Very High Sensitivity
• Fitted behind the Delta Max Waveguide
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
• Slpoed Input Plates
• M10 Flying inserts
AESTHETIC SPECIFICATIONS
• British Acoustics Signature Umber Brown Tone
• Non Reflective, Matte Black Grills
• Available in a RAL code of your choice (24 nos, minimum)
OPERATING PARAMETERS
• Operating positions: Flown with the correct
accessory or deployed vertically.
• Maximum permitted ambient temperature
(Ta max) 55° C (124° F)
• Minimum permitted ambient temperature
(Ta min): -9° C (15.8° F)
IP SPECIFICATIONS
• IP 43 - Standard protection against dust &
splashes
OPTIONAL ACCESSORIES
• See system chart for the System Accessories
SIZE
• Product : 1231 x 533 x 520 mm (H x W x D)
• Product : 48.5 x 21 x 20.5 inch (H x W x D)
• Packed individually4"
WEIGHT
• Net : 52.25 Kgs
• Net : 115.19 Lbs
SHIPPING INFORMATION
• Carton Size
1282.7 x 609.6 x 609.6 mm (H x W x D)
50.5 x 24 x 24 inch (H x W x D)
• Gross Weight : 57.75 Kgs / 127.31696 Lbs
• Packed : Individually
DOWNLOADS CENTRE
Datasheet Delta 975
DWG Drawing Delta 975
PDF Drawing Delta 975
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