LF-4115 Specifications (subject to change without notice)

Frequency Range:

33 - 1200 Hertz (-6dB)

29 - 3000 Hertz useable range (-10dB)

Nominal Coverage:

100° horizontal X 100° vertical at 1000 Hertz

Maximum Output:

127.0dB SPL calculated peak, 1 meter, half space, at rated rms power with 6 dB crest factor pink noise input, 35 - 1000 Hertz.

 

121.0dBA SPL calculated maximum continuous, 1 meter. The dBA scale is typically used to identify sound sources

 

which can cause permanent hearing loss.

Impedance:

4 ohms nominal

4.3ohms minimum, 160 Hertz 40 ohms maximum, 22 Hertz

Maximum Input Power: 400 watts rms (8 hours of 6dB crest factor pink noise, 40 - 400 Hertz) 600 watts rms (2 hours of 6dB crest factor pink noise, 40 - 400 Hertz)

recommended amplifier power capability- 1100 watts rms maximum into 4 ohms (per LF-4115)

Sensitivity:

93.5dB half space, 92.0dB full space, 35 - 1000 Hertz, 1 watt, 1 meter

Recommended Processing:

Subsonic filter below 30 Hertz, >18 dB per octave, maximum recommended crossover frequency is 1000 Hertz. QSC

 

DSP configurations are available at www.qscaudio.com. Parameters for alternative processing hardware are available

 

upon request.

Connectors:

Barrier strip screw terminals accept up to #10 AWG (5.3mm2) stranded wire. Four terminals: (two INPUT and two par-

 

allel OUTPUT).

Transducers:

15” (381mm) high efficiency low frequency transducer featuring vented 4” (100mm) copper voice coil on Kapton®

 

formers. High excursion/low distortion design, with extremely high power handling, and low thermal and port com-

 

pression.

Enclosure:

Quasi B4 alignment, ported enclosure with fully flared ports, low turbulence symmetrical port design, tuned to 36

 

Hertz, constructed of medium density fibreboard and heavily braced. Features vandal resistant woofer mounting bolts.

Size:

30” wide X 18” high X 20” deep (762mm X 457mm X 508mm)

Weight:

96 lbs. shipping, 83 lbs. net (44/38 kg.)

SPL and Impedance vs. Frequency

SPL (dB)

SPL 2pi

Impedance(ohms)

SPL 4pi

 

 

 

Impedance

Frequency (Hertz)

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QSC Audio LF-4115 Which can cause permanent hearing loss, Impedance Ohms nominal, Upon request, Connectors, Allel Output

LF-4115 specifications

The QSC Audio LF-4115 is a significant development in the realm of professional audio, particularly notable for its performance in low-frequency applications. Designed for concert venues, clubs, and other live sound applications, it promises to deliver robust bass response, meeting the demands of both musicians and sound engineers alike.

One of the standout features of the LF-4115 is its high-efficiency woofer, engineered to provide exceptional sound quality. The LF-4115 employs a 15-inch, cone driver that is purpose-built for low-frequency reproduction. With a power handling capacity of up to 800 watts continuous and 3200 watts peak, this subwoofer ensures that even the most powerful sound systems can achieve the deep, resonating bass that audiences expect.

Technologically, the LF-4115 utilizes state-of-the-art design principles. It features a bass-reflex enclosure, allowing for an optimized airflow that enhances the speaker’s overall performance. This design minimizes distortion and maximizes output, producing clear and powerful low frequencies that can fill large spaces. The cabinet is constructed from durable birch plywood, providing not only strength and stability but also acoustic properties that support excellent performance.

The LF-4115 is also equipped with a dual port design, which further aids in achieving the desired low-end extension and response. This feature helps to reduce air turbulence, ensuring cleaner bass notes even at high volumes. Additionally, the subwoofer includes built-in handles for easy transport and setup, making it a practical choice for touring professionals.

In terms of connectivity, the LF-4115 is versatile enough to integrate seamlessly with a variety of sound systems. It comes with dual Neutrik Speakon inputs, allowing for secure connections and daisy-chaining with other subwoofers or speakers. This flexibility makes the LF-4115 an attractive option for users looking to customize their audio environments.

Overall, the QSC Audio LF-4115 excels in providing high-quality low-frequency sound reproduction, making it a valuable asset for both live sound applications and fixed installations. With its powerful woofer, robust construction, and intelligent design, the LF-4115 stands as a testament to QSC's commitment to audio excellence, catering to the needs of professionals in the industry.