Contract 270
270W Class AB Mixer Amplifier
Product at a Glance
The British Acoustics Contract 270 is a single-channel, 270W Class AB mixer amplifier designed for medium-sized paging and background music systems. Supporting 100V, 70V, and low-Z (4Ω/8Ω) outputs, it adapts to diverse commercial audio setups. Inputs include priority mic, 2 mic, 2 aux, USB-A media, wireless, and TRS/Euroblock connectors for flexible integration. Featuring bass, treble, and master controls, LED output metering, dedicated volume knobs, and a VOX priority switch, it ensures intuitive operation. Advanced protections guard against short circuits, DC output faults, and peak overloads. Housed in a durable white aluminum chassis with a brushed steel front panel, the Contract 270 offers compact, intelligent performance for schools, retail, hospitality, and paging applications.
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
OUTPUT POWER
• 1 Channel
• 150W/ Ch @ 8Ω
• 270W / Ch @ 4Ω
• 270W / Ch @ 2.7Ω
• 270W / Ch @ 100V
• 270W / Ch @ 70V
AMPLIFIER INPUTS
• 1 x Priority Mic Input
• 2 x Mic Inputs
• 2 x Aux Inputs
• 1 x USB Input
• 1 x Wireless Input
AMPLIFIER OUTPUT
• 1 x Direct Output for 100V/70 or Low-Z
CONNECTORS
• Euroblock Connectors for Direct & Signal
Outputs
• TRS Jack Connectors for Mic Inputs
• USB-A Type Media Input
SYSTEM
SPECIFICATIONS
• Input CMRR > 60 dB
• Freq. resp.: 20Hz - 20kHz ±3dB
• THD : better than 0.1% (1 kHz)
• THD : better than 0.21% (FR)
• Nominal system gain: 27 dB
• Input Impedance — 20kΩ
• Signal Limiters Present
• Protection Against Short Cicrcuit & DC
Outputs Peak Limiting
• Mains In-rush Control prese
CONTROLS &
MONITORING
• Bass, Treble & Master Controls
• LED Strip for Output Metering
• 3 x Mic, 2 x Aux & 1 x Media Volume
Control Knobs
• Media Selection & Playback Controls
• Vox Switch for Priority Input
POWER CONSUMPTION
• 1A Power Consumption, Nominal @ 240V,
4 Ohms
• 2A Power Consumption, Nominal @ 120V, 4
Ohms
• See Power Consumption & Thermal
Emission Chart for a detailed specificati
OPERATING PARAMETERS
• Operating positions : To be used in a
rack-mount case with no front to back airflow
restriction
• Maximum permitted ambient temperature
(Ta max) 45° C (113° F)
• Minimum permitted ambient temperature
(Ta min): 0° C (32° F)
• 32 dB Fan Noise
AESTHETIC SPECIFICATIONS
• White Aluminum Chassis
• Matte Star Silver Front Pane
SIZE
• Product : 88 x 482 x 458 mm (H x W x D)
• Product : 3.4 x 19 x 18 inch (H x W x D)
• Packed individually
WEIGHT
• Net : 11 Kgs
• Net : 24.2 Lbs
SHIPPING INFORMATION
• Carton Size
163 x 556 x 533 mm (H x W x D)
6 x 22 x 21 inch (H x W x D)
• Gross Weight : 13 Kgs / 28.7 Lbs
• Packed : Individually
DOWNLOADS CENTRE
Datasheet Contract 270
DWG Drawing Contract 270
PDF Drawing Contract 270
