Klipsch R-115SW Subwoofer – 15″ 400W Thunderous Bass with Front Slot Port

Klipsch R-115SW Subwoofer – Massive 15-Inch Subwoofer for Deep, Explosive, Theater-Grade Bass

The Klipsch R-115SW is a high-powered 15-inch subwoofer engineered to deliver chest-thumping, cinema-quality bass. As the largest and most powerful model in the Klipsch Reference Series subwoofer lineup, the R-115SW is designed for those who want ultra-deep low frequencies, earth-shaking impact, and crystal-clear definition—whether for movies, music, or immersive gaming.

With its 15″ Cerametallic™ front-firing driver, a robust 400W RMS (800W peak) digital amplifier, and a front slot port, the R-115SW offers an unbeatable combination of power, finesse, and visual appeal. It’s ideal for large home theaters, open-plan living rooms, and dedicated media rooms where nothing less than reference-level bass performance will do.

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🔑 Key Features at a Glance

• 15” Front-Firing Cerametallic™ Woofer

• 400W RMS / 800W Peak All-Digital Amplifier

• Front Slot Port for Reduced Distortion

• Frequency Response: 18Hz – 125Hz

• Low Pass Crossover & Phase Control

• LFE and Line-Level RCA Inputs

• Modern MDF Cabinet with Brushed Polymer Veneer

• Magnetic Grille for Clean, Customizable Look

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🔊 Cerametallic™ Driver – Size Meets Speed

The standout feature of the R-115SW is its 15-inch Cerametallic™ cone woofer, crafted from anodized aluminum and finished in Klipsch’s signature copper tone. This cone design offers extreme stiffness and lightweight performance, allowing the driver to move vast volumes of air without flexing or distorting, even at high SPLs.

The result? Massive, clean, and controlled bass that maintains speed and definition across all types of media—explosions feel realistic, basslines hit hard, and ambient rumble sounds immersive instead of muddy.

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⚡ 400W All-Digital Amplifier – Precision with Headroom

The 400-watt RMS (800-watt peak) amplifier driving the R-115SW is fully digital, offering ultra-efficient power delivery with minimal heat and maximum accuracy. This level of power allows the subwoofer to hit extremely low frequencies (down to 18Hz) while maintaining control, speed, and clarity—qualities often lost in subwoofers with high wattage but poor tuning.

Thanks to its carefully calibrated amp-driver pairing, the R-115SW offers studio-grade performance at theater-like output levels.

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🌀 Front Slot Port – Big Bass Without Turbulence

To manage the extreme air movement from its large woofer, the R-115SW incorporates a front slot port with internal flare technology. This design helps minimize air turbulence and port noise, ensuring smoother airflow and deeper bass with less distortion, even at reference listening volumes.

Front porting also means easier placement—you can place it near walls or furniture without compromising low-end performance, a big advantage in real-world living spaces.

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🎛️ Crossover and Phase Controls for Fine-Tuned Integration

Every room is different, and the R-115SW gives you control over how it interacts with your system and space. It includes:

• Variable Low-Pass Crossover (40Hz – 120Hz) – Match the sub’s frequency response to your main speakers.

• Phase Switch (0°/180°) – Align timing for tighter bass and avoid phase cancellation.

These simple yet crucial controls allow for seamless integration whether you’re building a 2.1 system or expanding a 7.1 surround sound layout.

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🔌 Versatile Connectivity

Connectivity is streamlined and universal:

• LFE (Low Frequency Effects) RCA Input – Connect to the sub-out of any home theater receiver.

• Line-Level RCA Inputs – Works with stereo receivers and integrated amps.

This makes the R-115SW compatible with a wide range of audio systems, from budget AV receivers to audiophile 2-channel rigs.

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🧱 Cabinet Design – Built to Perform and Impress

Despite its size, the Klipsch R-115SW maintains an elegant look, thanks to its brushed black polymer veneer finish and minimalist design. The magnetic grille offers a clean front panel when attached, or you can remove it to show off the iconic copper cone.

Internally, the cabinet is constructed from MDF for rigidity and acoustic neutrality. Its weight and solid build reduce vibration and unwanted resonance, ensuring that all you hear is the bass—not the box.

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📈 Technical Specifications

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🧩 Ideal Use Cases

The Klipsch R-115SW is perfect for:

• Large Home Theater Rooms

• Dedicated Audiophile Listening Rooms

• Multi-row Surround Systems (5.1.2, 7.1, 9.2)

• Open Floor Plans & High-Ceiling Spaces

This subwoofer is designed to fill space with powerful, clean low frequencies, making it ideal for setups where typical 10” or 12” models fall short.

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🔄 Compared to Other Klipsch Subwoofers

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✅ Why Choose the Klipsch R-115SW?

• Massive 15-inch driver for subsonic bass

• Deeper response (18Hz) than most consumer subwoofers

• Ideal for high-SPL environments like large rooms or theaters

• Cerametallic™ cone ensures speed and accuracy

• Front porting gives more placement flexibility

• Modern design matches premium Klipsch speakers

This is the subwoofer for listeners who want no compromise—more output, more depth, more realism.

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🎬 Final Thoughts

The Klipsch R-115SW redefines what’s possible in home subwoofers. With its powerful 15” Cerametallic™ woofer, robust digital amplifier, and sophisticated cabinet design, this model delivers professional-level bass in a package that fits beautifully into home environments.

Whether you’re recreating a cinematic experience, feeling every note of a live concert, or upgrading your high-fidelity audio system, the R-115SW gives you everything you need to feel the sound—not just hear it.

If you want to build a system that doesn’t hold back, the Klipsch R-115SW is the ultimate foundation.

Explore the Klipsch Collection at Lux Audio