4642A 双 460 mm (18 英寸) 超低音系统
JBL 4642A 型号是一款高质量的超低音系统，采用先进的 460 mm (18 英寸) 低频换能器，安装在直接辐射式的低音反射箱体中，实现对最低可听频率的平滑响应。4642A 非常适合在电影放映厅中增强模拟或数字音轨的低频，并适用于一般的声音增强应用。
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特点
- 1200 Watts Continuous Pink Noise, 2400 Watts Continuous Program Power Handling
- Usable response to 22 Hz (-10 dB, no EQ), flat to 22 Hz (-3 dB) with External EQ
- 2241H VGCTM Vented Gap Cooled Drivers – High Sensitivity – Low Power Compression – High Maximum-SPL Capability – Low 2nd and 3rd Harmonic – Distortion – Symmetrical Field Geometry SFGTM – Magnet Structure – Long Excursion Capability
- proved by Lucasfilm, Ltd. for THX® installations
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Specifications
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158.1 KB |
Compliances
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33.4 KB |
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144.3 KB |
Tech Notes
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55.0 KB |
Information documents
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21.9 MB |
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零件与服务
性能
| 频率响应(±3 dB) | 22 Hz - 100 Hz |
| 频率范围 (-10dB) | 20 Hz - 500 Hz |
| 额定阻抗 | 4 ohms |
| Minimum Impedance | 3.2 ohms |
| Power Handling Capability | - |
| Continuous Pink Noise | 1200 Watts |
| Continuous Program | 2400 Watts |
| Peak Power | 4800 Watts |
| OUTPUT CAPABILITY | - |
| Axial Sensitivity | 50 Hz to 500 Hz; 101 dB, 1W @ 1m 40 Hz to 100 Hz; 100 dB, 1W @ 1m |
| Net Weight (each) | 216 lbs (98 kg) |
| 尺寸（高 x 宽 x 厚） | 762 mm x 1219 mm x 610 mm 30 in x 48 in x 24 in |
| Power Handling (2Hr AES Rating) | 1200 W |
灵敏度 |
100 dB |
| Maximum SPL (1m) | 131 dB |
| 标称阻抗 | 2 x 8Ω |
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