1. The rear cylinder is made of lightweight aluminum alloy material, which enhances its ability to resist oxidation and corrosion while ensuring maximum safety during use;

2. The lightweight aluminum alloy material has a heat resistance of ≥ 600 ℃ and can ensure normal use in case of a fire alarm;

3. The rear cylinder adopts a hexagonal box structure, which is used to enhance the sound wave reflection inside the box, increase the sound wave density, and make the bass more robust and elastic;

4. Unique design of bass guide holes improves the problem of weak bass sensation in coaxial units, with a wider range and fuller and heavier vocals;

5. Using dual magnetic coaxial speaker units, the direct sound intensity is stronger, increasing the clarity of human voices;

Technical parameters:

1. Speaker type: Passive coaxial ceiling speaker

2. Continuous power: 40W (RMS) Impedance: 8 Ω

3. Unit: 4 "full frequency unit

4. Maximum sound pressure level (1M): 88dB (calculated value)

5. Frequency response: 70Hz-15KHz (-10dB)

6. Cylinder material: aluminum alloy, optional transformer:

7. Size: Φ 214mm

8. Hole size: Φ 185mm

9. Height: 209mm

11. Net weight: 1.54Kg