LF-3115 Specifications (subject to change without notice)

Frequency Range:

33 - 1900 Hertz (-6dB)

30 - 3200 Hertz useable range (-10dB)

Nominal Coverage:

100° horizontal X 100° vertical at 1000 Hertz

Maximum Output:

126.5dB SPL calculated peak, 1 meter, half space, at rated rms power with 6 dB crest factor pink noise input, 35 - 1000 Hertz.

 

120.5dBA SPL calculated maximum continuous, 1 meter. The dBA scale is typically used to identify sound sources

 

which can cause permanent hearing loss.

Impedance:

8 ohms nominal

8 ohms minimum, 160 Hertz

90 ohms maximum, 22 Hertz

Maximum Input Power: 300 watts rms (8 hours of 6dB crest factor pink noise, 40 - 400 Hertz) 375 watts rms (2 hours of 6dB crest factor pink noise, 40 - 400 Hertz)

Recommended amplifier power capability- 600 watts rms maximum into 8 ohms (per LF-3115)

Sensitivity:

95.5dB half space, 94.0dB 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 3” (76mm) copper voice coil on Kapton® form-

 

ers. High excursion/low distortion design, with extremely high power handling, and low thermal and port compression.

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 2pi

 

SPL 4pi

SPL (dB)

Impedance(ohms)

 

Impedance

Frequency (Hertz)

Page 9
Image 9
QSC Audio SC-312X Which can cause permanent hearing loss, Impedance Ohms nominal, Upon request, Allel Output, Enclosure

SC-312X specifications

The QSC Audio SC-312X is an advanced two-way loudspeaker designed to meet the demands of various audio applications, from live sound reinforcement to installations in sports venues, auditoriums, and houses of worship. This versatile loudspeaker is known for its exceptional sound quality, durability, and user-friendly features that make it a popular choice among audio professionals.

One of the standout features of the SC-312X is its powerful coaxial design. Utilizing a 12-inch low-frequency driver and a 1.4-inch exit high-frequency driver integrated into a single point source, this configuration allows for a more uniform dispersion of sound across a wide listening area. This results in improved clarity and reduced phase cancellations, ensuring that the audio is consistent regardless of the listener's position in relation to the speaker.

The SC-312X incorporates QSC's advanced DMT (Directivity Matched Transition) technology, which is designed to provide a smooth frequency response across the entire coverage pattern. This technology enables the loudspeaker to maintain a consistent tonal balance both on and off-axis, making it ideal for applications where audience coverage is critical.

In terms of construction, the SC-312X is built to withstand the rigors of professional use. Its cabinet is made from rugged plywood, finished with a durable coating that helps protect against wear and tear. Additionally, the front grille is made from perforated steel, providing extra protection for the drivers while allowing for optimal sound output.

Another important characteristic of the SC-312X is its versatility in rigging and mounting options. The loudspeaker comes equipped with integral fly points, which simplifies the process of suspension in various configurations. It also features a stand-mountable design, making it suitable for both permanent installations and portable setups.

The speaker’s power handling capability is impressive, accommodating a wide range of amplifiers and making it suitable for large venue applications. The SC-312X delivers a powerful output without sacrificing audio fidelity, ensuring that every nuance of the performance is captured and conveyed to the audience.

In summary, the QSC Audio SC-312X is an exceptional loudspeaker that combines innovative technology with robust construction to deliver unparalleled performance in any professional audio setting. Its coaxial design, advanced DMT technology, rugged build quality, and flexible mounting options make it a reliable choice for audio engineers and sound professionals looking to achieve the highest standards in sound reproduction.