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影院扬声器系统用户手册

LF-4215 低频扬声器

简介

LF-4215 双 15” (381 毫米 ) 的低频机壳专为影院应用设计。LF-4215 和传

统 “摇滚”低音系统的不同之处在于它可以满足影院对扩展低频响应的要 求。根据高频系统的要求,LF-4215 可覆盖 35 赫兹到 1000 赫兹的频率范 围。 由于强耦合低音扬声器 (CCW)的低音扬声器之间间距小,因此和大 间距设计相比,具有耦合好,较大频率范围覆盖角度宽的特点。

两个定制 400 瓦,15” 变频器专为影院使用开发。特别具有超大 4” (100 毫米 ) 音圈和一个多通风极片,确保即使在高功率的情况下, 也能保持清凉 的运行环境。温度低可以增加变频器的寿命,并且减少高功率下的功率压缩 问题。低切极片确保音圈在对称磁隙 (SMG)中运行,从而减少了二次谐波 失真。

机壳由高质量的总配线架面板构成,具有单低音室的特点 (SWC,每个变频 器有各自分开的音室)。在非常少见的情况下如果变频器出现故障,可以防 止不当盒负荷造成的其余变频器振幅过大。

大型、全辐射口 (FRP)确保气流平稳通过端口,特别是在功率较高的情况 下。这可以防止潜在的声音端口噪音紊乱。无论是内部还是外部端口开口都 是全辐射的。

由于具有端口负荷 (SPL),低音端口均匀地分布在变频器两侧,使通过变 频器背表面的内部压力更加一致。这样就防止了圆锥由于力量失衡而被错误 地放置在一边或另一边,从而减少了高功率情况下将音圈赶出空隙中心的情 况。

机罩上部的 3 个 T 形螺母使得安装 QSC 的 HF-75 高频系统或 MH-1075 中高 频系统更加容易。

机罩并没有设计成悬挂式、可操纵式、或装配式。请勿对此机罩进行 悬挂、操纵或装配。

此产品可产生对人类听觉造成永久损伤的声压强度。请将听音区域内 的声压强度总是保持在不会对人的听力造成损伤的水平。

按照 QSC Audio Product 的说明并在授权的专业工程师的指导下安 装。仅限使用 QSC Audio Product 公司规定的附件、底座、零件或支 架。所有维护请由合格的专业人士进行。设备如果受到损坏,就需要 进行维修。

警告!放置、安装、装配或悬挂扬声器产品时,检查所有硬件、悬 架、搁柜、变频器、支架和相关设备有无损坏。任何额定部件的缺 失、腐蚀、变形或未装载都可能大大降低安装、放置或排列的强度。 出现任何严重降低安装安全度的情况应立即更正。仅限使用额定安装 的硬件及任何可能的短期突发超载。切勿超过硬件或设备的额定标 准。如有任何关于物理设备安装的疑问或问题,请咨询获得许可的专 业工程师。

高频或中高频系统安装

TD-000141-00 修订版 D © 版权 2003, 2004, QSC Audio Products, Inc. QSC® 是 QSC Audio Products, Inc. 的注册商标 “QSC”以及 QSC 的标志在美国专利和商标管理局注册

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Polaroid user manual LF-4215 低频扬声器

LF-4215 specifications

The Polaroid LF-4215 is a remarkable addition to the world of instant photography, designed to bring nostalgia and modern appeal together. Aimed at both amateur photographers and seasoned professionals, this camera offers a unique blend of features that makes it stand out in today’s fast-paced digital landscape.

At the heart of the LF-4215 is its robust imaging technology, which combines a high-resolution lens with a powerful image sensor. This allows for vibrant, detailed photos with the characteristic Polaroid aesthetic. The camera uses a unique film format that delivers rich colors and striking contrasts, reminiscent of the iconic Polaroid prints from the past. The LF-4215 employs a special blend of analog and digital technologies, allowing photographers to enjoy the charm of instant film without sacrificing image quality.

One of the standout features of the LF-4215 is its easy-to-use interface. With a simple control layout, users can swiftly navigate settings such as exposure, ISO, and focus. The camera also includes several pre-set shooting modes tailored for different environments, whether you’re capturing a sunny outdoor scene or a low-light setting. This flexibility invites creativity, enabling photographers to experiment with various styles and techniques.

Moreover, the LF-4215 comes equipped with a built-in flash, which ensures that your images are well-lit in any situation. The camera's viewfinder offers a bright and clear framing experience, making it easier for users to compose their shots accurately. Additionally, the LF-4215 supports multiple exposure settings, allowing for unique artistic expressions and double exposures.

Another significant characteristic of the LF-4215 includes its compact and lightweight design, making it an ideal companion for on-the-go photography. Coupled with a durable exterior, this camera is built to withstand the rigors of outdoor adventures, ensuring that users can capture memorable moments without worry.

In conclusion, the Polaroid LF-4215 is a beacon of instant photography, merging classic charm with modern technology. Its impressive features, user-friendly design, and premium imaging capabilities make it a fantastic choice for anyone looking to experience the magic of instant captures. Whether you’re documenting life’s little moments or indulging in creative photography, the LF-4215 is sure to deliver satisfying results that you'll cherish for years to come.