Adastra Heavy Duty 8" 100V Round Horn Speaker

8" 100V Round Horn Speaker

Adastra Heavy Duty 8" 100V Round Horn Speaker

Heavy-duty round PA horn speakers with a fibreglass compression driver and 100V transformer with a weatherproof ABS cover and reflex cone. Sound is projected from a spun aluminium flare which is angle adjustable on the mounting bracket. 

Power tappings are selected via a rotary switch at the rear with a 2-core cable for connection to a 100V amplifier. 

Built to withstand the elements and designed to deliver information and alerts in public outdoor areas.

  • Tappings: 2.5W, 5W, 10W, 15W
  • Power handling rms: 15W
  • Sensitivity: 106dB
  • Frequency response: 450Hz - 5kHz
  • Dimensions: 240 x 205mmØ
  • Housing material: Aluminium & ABS
  • IP rating: IPX6

    For many applications, it is necessary to drive many speakers with a single amplifier, giving greater coverage to multiple rooms or over a given area. Constant voltage systems (usually 100V line) employ a transformer in the amplifier to convert the output to high impedance and a corresponding transformer in each speaker to tap of the required power from the amplifier.

    Theoretically, this allows a large number of speakers to be driven by one amplifier, so long as the overall power being tapped by the speakers is within the amplifier’s output capacity (usually 90% of the amplifier’s maximum rated output).

    Standard 100V line set-up


    Total tapped power: 80W

    In addition, the transformers in each speaker may have tappings at different points along the primary coil, which effectively draw different Wattages from the amplifier. For example, a 10W speaker may also have settings for 5W or 2.5W.

    The speaker output may also be varied using remote volume controls, known as attenuators, but these should be considered to be at their maximum volume output when choosing an amplifier to drive the speakers.

    100V line set-up with multiple tappings


    Wired in parallel and tapped to 90% of the amplfiers max. power output

    If more speakers are required beyond 90% of the 100V amplifier’s maximum output, a slave amplifier may be employed to drive these.

    The slave amplifier is simply linked from the line output of the main amplifier, to which another series of speakers are then linked to, in the same way the speaker are from the main amplifier.

    Extended 100V line set-up


    Main 4 speaker system with additional 4 speaker set and slave amplifier

SKUSKU: 952.083UK
Reward points:0

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