QSC Pro audio E118sw

The E Series: QSC Passive Speakers Designed for the Stage

The QSC E118SW is part of the E series, a range of professional passive speakers intended for concert halls, clubs, and event providers. The goal is clear: to offer reliable, durable, and coherent sound reinforcement, with a plywood construction coated in textured black paint, designed to withstand the rigors of transport and installation.

Paired with QSC amplifiers (notably the GXD or PLD series) or a TouchMix digital console, the E118SW can be integrated into an optimized system via DSP and factory presets, to achieve a more homogeneous sound and faster setup on site, especially when quick stage changes are required.

Who Is the QSC E118SW For?

The E118SW is aimed at users who want to reinforce the low end of a passive sound system: sound engineers, event providers, clubs, theaters, places of worship, as well as demanding bands seeking more present bass on stage. With its 1 x 18" format and a maximum SPL of 133 dB (peak, at 1 m), it is particularly suited for contemporary music where the kick drum, bass, and electronic sequences need to remain clear and impactful.

It naturally complements passive tops from the same family to build a coherent system. In practice, it relieves the main speakers of the lowest frequencies and enhances the sense of impact, while maintaining a better headroom across the entire system.

Design, Performance, and Integration: What Makes the Difference

A Passive Subwoofer Built to Withstand Pressure

The QSC E118SW is a passive subwoofer, meaning it requires a suitable external amplifier. This architecture is highly appreciated in live sound because it allows precise sizing of amplification power, centralizes processing (filtering, limiter, EQ), and simplifies maintenance. With an RMS power of 800 W and a peak power of 3200 W, it is designed to hold up under demanding program material.

An 18" Dedicated to Bass, with a Sub-Oriented Bandwidth

Its specified frequency response extends down to 32 Hz (-10 dB) and 37 Hz (-6 dB), effectively covering fundamentals and sub-bass energy. The stated high-pass cutoff at 230 Hz allows choosing an appropriate crossover point with the tops, depending on the filter used and system type. The intended result is solid, usable bass that is fast enough to remain musical, whether in front of house or as reinforcement for a dance floor.

Professional Connectivity for Clean Wiring

The E118SW offers stage-oriented connectivity: two inputs on NL4 connectors, complemented by a terminal block. This facilitates daisy-chaining, adaptations according to cable inventories, and fixed installations. With a 4-ohm impedance, it is simply necessary to select compatible amplification and correctly calculate the total load if multiple speakers are connected on the same channel.

Finish and Protection: Ready for the Road

The plywood enclosure, steel grille, and protective foam help shield the speaker from shocks and dust, while maintaining a sober and professional aesthetic. Weighing 43 kg, the E118SW is built for live use: stable, reliable, and designed to endure intensive operating conditions.

Technical specifications

Category	Soundsystem	Sensitivity	98 dB, 1 W @ 1 m
Type	passive subwoofer	SPL max	133 dB
Peak power	3200 W	Frequency response - start	37 Hz
Speaker diameter	18"	Frequency response - end	230 Hz
Cut-off frequency	Adjustable from 80 Hz to 120 Hz	Color	Black
Impedance	4 Ω	Power output	800 W

Design	passive subwoofer	Power (Peak)	3200 W
Woofer	18"	Inputs	2 x NL4, 1 x terminal block
Max SPL (Peak SPL at 1 m)	133 dB	Enclosure	plywood
Frequency Response (-6 dB)	37 Hz to 230 Hz	Net Weight	43.00 kg
Frequency Response (-10 dB)	32 Hz to 230 Hz	Accessories (not included)	cover
Power (RMS)	800 W	Warranty	3 years