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QSC LF-4315 User Manual
QSC LF-4315 User Manual

QSC LF-4315 User Manual

Cinema loudspeaker systems low frequency loudspeaker
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Cinema Loudspeaker Systems User Manual
LF-4315
Low Frequency Loudspeaker
Introduction
The LF-4315 15" (381mm) low frequency enclosure is designed specifically for cinema appli-
cations. Meeting cinema requirements for extended low frequency response differentiates
the LF-4315 from more conventional "rock-and-roll" woofer systems. The LF-4315 covers the
frequency range from 30 Hertz to 500 Hertz, depending upon the high frequency system
requirements.
The three custom 400 watt, 15" transducers were developed specifically for cinema use.
They feature 4" (100mm) voice coils, 120 oz.(3.4kg) ceramic magnets, and multi-vented pole
pieces to ensure cool operation. Cooler temperatures increase transducer lifespan and
decrease power compression at high power levels. Undercut pole pieces ensure the voice
coils operate in symmetrical magnetic gaps, reducing second order harmonic distortion. The
suspension and voice coils of the transducers have been designed to provide low distortion
and high impact bass at high power.
The enclosure is constructed of high quality medium density fiberboard panels with stiffen-
ing braces on all panels. Both internal and external port openings are fully radiused ensuring
smooth air flow at higher power levels, preventing audible port turbulence.
Bass ports are symmetrically spaced on each side of the transducers, making internal pres-
sure more uniform across the back surface of the transducers. This prevents the cones from
being displaced to one side or another by unbalanced forces, reducing the chance of driving
the voice coils out of the center of the gaps at high power.
Three T-nuts in the top of the enclosure provide easy mounting of QSC's HF-75 high fre-
quency system, or MH-1075 mid-high system.
Enclosure is not designed to be suspended, flown, or rigged. Do not sus-
pend, fly, or rig this enclosure.
This product is capable of producing sound pressure levels that can perma-
nently damage human hearing. Always keep sound pressure levels in the
listening area below levels that can damage human hearing.
Install in accordance with QSC Audio Product's instructions and a
licensed, professional engineer. Only use attachments, mounts, accesso-
ries, or brackets specified by QSC Audio Products, Inc. Refer all servicing
to qualified personnel. Servicing is required when the apparatus has been
damaged in any way.
WARNING! Before placing, installing, rigging, or suspending any speaker
product, inspect all hardware, suspension, cabinets, transducers, brackets
and associated equipment for damage. Any missing, corroded, deformed or
non-load rated component could significantly reduce the strength of the
installation, placement, or array. Any such condition severely reduces the
safety of the installation and should be immediately corrected. Use only
hardware which is rated for the loading conditions of the installation and
any possible short-term unexpected overloading. Never exceed the rating
of the hardware or equipment. Consult a licensed, professional engineer
when any doubt or questions arise regarding a physical equipment installa-
tion.
1675 MacArthur Blvd., Costa Mesa, CA, 92626 USA
Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079
Customer Service (714) 957-7150 or toll free (USA only) (800) 772-2834
Mounting points for
high or mid-high
system
*TD-000177-00*
© Copyright 2004, QSC Audio Products, Inc.
QSC® is a registered trademark of QSC Audio Products, Inc.
"QSC" and the QSC logo are registered with the U.S. Patent and Trademark Office
TD-000177-00 rev.C

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Summary of Contents for QSC LF-4315

  • Page 1 LF-4315 Low Frequency Loudspeaker Introduction The LF-4315 15” (381mm) low frequency enclosure is designed specifically for cinema appli- cations. Meeting cinema requirements for extended low frequency response differentiates the LF-4315 from more conventional “rock-and-roll” woofer systems. The LF-4315 covers the frequency range from 30 Hertz to 500 Hertz, depending upon the high frequency system requirements.
  • Page 2 Connections Normal Connection The LF-4315 has barrier strip screw termi- nals for connection. The terminals accept up to #10 AWG (5.3mm ) stranded loud- speaker wiring. Use the largest wire size and shortest wire length possible for a given installation. Observe the polarity...
  • Page 3 1200 watts rms (8 hours of 6dB crest factor pink noise, 40 - 400 Hertz) 1500 watts rms (2 hours of 6dB crest factor pink noise, 40 - 400 Hertz) recommended amplifier power capability- 2400 watts rms maximum into 4 ohms (per LF-4315) Sensitivity: 99.0dB half space, 98.0dB full space, 35 - 1000 Hertz, 1 watt, 1 meter...
  • Page 4 Warranty (USA only; other countries, see your dealer or distributor) Disclaimer QSC Audio Products, Inc. is not liable for any damage to amplifiers, or any other equipment that is caused by negligence or improper installation and/or use of this loudspeaker product.
  • Page 5 LF-4315 de otros sistemas woofer tipo “rock-and-roll” más convenciona- les. El altavoz LF-4315 cubre un intervalo de frecuencia de 30 Hertzios a 500 Hertzios, depen- diendo de los requisitos del sistema de alta frecuencia.
  • Page 6 Conexiones Conexión normal El altavoz LF-4315 tiene terminales de tor- nillo de barra protectora para su conexión. Los terminales aceptan cableado trenzado de hasta #10 AWG (5.3 mm ) para altav- oces. Use el alambre del calibre más grande y de la longitud más corta posible en cualquier instalación.
  • Page 7 1500 vatios rms (2 horas de ruido rosa con factor de cresta de 6 dB, 40 - 400 Hertzios) Capacidad recomendada de potencia del amplificador: 2400 vatios rms como máximo en 4 ohmios (por LF-4315) Sensibilidad: 99.0 dB medio espacio, 98.0 dB espacio completo, 35 - 1000 Hertzios, 1 vatio, 1 metro Procesamiento Filtro subsónico menor de 25 Hertzios, >18 dB por octava, la frecuencia máxima de cruce recomendada es de 500...
  • Page 8 Garantía (sólo para EE.UU.; para otros países, consulte con su vendedor o distribuidor) Renuncia de responsabilidad QSC Audio Products, Inc. no es responsable por ningún daño a los amplificadores, ni a ningún otro equipo que sea causado por negligencia o instalación y/o uso inadecuado de este altavoz.
  • Page 9 Les exigences des cinémas en matière de réponse longue durée basse fréquence différencient le LF-4315 des systèmes de haut-parleurs de graves « rock-and- roll » plus conventionnels. Le LF-4315 couvre la plage de fréquence de 30 à 500 Hz, selon les exigences de haute fréquence du système.
  • Page 10 Branchements Branchement normal Le branchement du LF-4315 se fait à partir de bornes vissables de bornier à cloisons. Les bornes acceptent des câbles de haut-parleurs toronnés pouvant atteindre #10 AWG (5,3 mm ). Utiliser le calibre de conducteur maximal et la longueur de conducteur minimale, dans la mesure du possible, pour toute installation.
  • Page 11 1 200 W (efficace) (8 heures de bruit rose de facteur de crête 6 dB, 40 à 400 Hz) 1 500 W (efficace) (2 heures de bruit rose de facteur de crête 6 dB, 40 à 400 Hz) Capacité de puissance d'amplificateur recommandée - 2 400 W (efficace) maximum dans 4 ohms (conformément au modèle LF-4315) Sensibilité : 99 dB demi-espacement, 98 dB espacement total, 35 à...
  • Page 12 QSC Audio Products - Garantie limitée de 3 ans QSC Audio Products, Inc. (« QSC ») garantit que ses produits sont dépourvus de tout vice de fabrication et/ou de matériel pendant une période de trois (3) ans à partir de la date de vente et remplacera les pièces défectueuses et réparera les produits qui fonctionnent mal dans le cadre de cette garantie si le défaut survient dans des conditions normales d'installation et d'utilisation - à...
  • Page 13 Voraussetzungen für Kinoanwendungen erfüllt, unterscheidet sie sich von konventionellen „Rock- and-Roll“-Tieftonlautsprechern. Je nach den Anforderungen der Hochfrequenzanlage deckt das Modell LF-4315 den Frequenzbereich zwischen 30 und 500 Hz ab. Die drei 15-Zoll-Wandler mit 400 W wurden speziell für Kinoanwendungen entwickelt. Sie umfassen 4-Zoll- (100-mm-) Schwingspulen, 3,4-kg-Keramikmagneten und mehrfach belüftete...
  • Page 14 Erzielung optimaler Leistung auf eine gleich bleibende Polarität in der gesamten Anlage achten. Paralleler Anschluss des zweiten LF-4315 Ein weiterer LF-4315 kann über die mit der Bezeichnung OUTPUT gekennzeichnete Klemme parallel angeschlossen werden. Die Drähte wie in der rechten Abbildung dargestellt anschließen.
  • Page 15 1200 W eff. (8 Stunden bei Rosa-Rauschen mit einem Crestfaktor von 6 dB, 40 - 400 Hz) 1500 W eff. (2 Stunden bei Rosa-Rauschen mit einem Crestfaktor von 6 dB, 40 - 400 Hz) Empfohlene Verstärkerleistung: max. 2.400 W eff. über 4 Ohm (je LF-4315) Empfindlichkeit:...
  • Page 16 Beschränkte Dreijahresgarantie durch QSC Audio Products QSC Audio Products, Inc. („QSC“) gewährleistet, dass seine Produkte für einen Zeitraum von drei (3) Jahren ab dem Kaufdatum keine Material- und/oder Ausführungsfehler aufweisen werden, und QSC verpflichtet sich zum Ersatz defekter Teile und zur Reparatur funktionsgestörter Produkte gemäß...
  • Page 17 影院扬声器系统用户手册 LF-4315 低频扬声器 简介 LF-4315 15” (381 毫米 ) 的低频机壳专为影院应用设计。LF-4315 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-4315 可覆盖 30 赫兹到 500 赫兹的频率范围。 三个定制 400 瓦,15” 变频器专为影院使用开发。它们采用 4” (100mm) 音圈,120 oz.(3.4kg) 陶瓷磁铁和多通风极片 (确保低温运行) 。较低温 度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。变频器的支 架和音圈可保证在高功率下的低失真和高重低音。 机罩由优质中等密度纤维板制成,所有面板都有加强支架支持。内部和外部 端口开口都经过全辐射处理,确保气流在较高功率下可以平稳通过端口,防 止声音端口气流紊乱。 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 HF-75 高频系统或 MH-1075 中高频...
  • Page 18 连接 正常连接 LF-4315 具有用于连接的阻挡带螺 旋式终端。此终端接受高达 #10 AWG (5.3mm ) 的绞合式扬声器 电线。对于特定的安装,尽可能使 用最大电线尺寸和最短电线长度。 观察极性标志,确保整个系统极性 一致,以便获得最佳表现。 第二个 LF-4315 并联连接 标记为 OUTPUT 的终端可用于并联 另一个 LF-4315。按照右图所示连 接线路。 正常连接样例 : 并联样例 : 放大器可以带动 5.5 欧姆负载 放大器可以带动 2.75 欧姆负载...
  • Page 19 1200 瓦 rms (6dB 振幅因子粉红噪音 8 小时,40 - 400 赫兹) 1500 瓦 rms (6dB 振幅因子粉红噪音 2 小时,40 - 400 赫兹 ) 推荐放大器功率 - 2400 瓦 rms 最大到 4 欧姆 ( 每 LF-4315) 灵敏度: 99.0dB 半间距,98.0dB 全间距,35 - 1000 赫兹,1 瓦,1 米...
  • Page 20 客服 (714) 957-7150 或免费电话 ( 仅限美国 ) (800) 772-2834 传真: 销售与市场部门传真 (714) 754-6174 客服传真 (714) 754-6173 网址 www.qscaudio.com E-mail:info@qscaudio.com service@qscaudio.com QSC Audio Products, Inc.1675 MacArthur Boulevard Costa Mesa, California 92626 USA ©2004 “QSC”以及 QSC 的标志在美国专利和商标管理局注册。 Kapton® 为 E.I.du Pont de Nemours and Company 的注册商标。...