This high performance horn speaker boasts a massive SPL of 128.5 dB at 40 Watts providing high forceful and effective sound penetration making it well suited to very noisy installations. The horn is IP65 rated and is constructed from heavy duty ABS.The sturdy mounting bracket is powdercoated and secured with nickel-chromium plated mild steel bolts. Power taps are selected via the inbuilt selector switch. The voice coil is wound on an aluminium bobbin providing effective heat transfer from the coil thereby improving the efficiency and reliability of the speaker.