Klipsch SPL-120 MK-II 12" Powered Subwoofer at Vinyl Sound Toronto Canada

The SPL-120 MK-II is a high-performance 12-inch powered home theater subwoofer from Klipsch (Indianapolis, Indiana, USA), available at Vinyl Sound in Toronto, Canada. Part of the Klipsch Reference Premiere SPL Series, this second-generation design represents what Klipsch describes as the best high-performance subwoofers the company has ever made. The SPL-120 MK-II pairs a newly designed spun copper front-firing Cerametallic woofer with a high-efficiency Class D amplifier delivering 300 watts RMS and 600 watts peak, achieving a frequency response of 24 Hz to 125 Hz (+/- 3 dB) and a maximum acoustic output of 118 dB. The proprietary Aerofoil front-firing slot port with internal flare geometry, WA-2 wireless kit compatibility, and simultaneous dual-input capability make the SPL-120 MK-II one of the most acoustically and practically versatile subwoofers available for home theater and two-channel systems in this class.

Newly Designed Cerametallic Woofer and Driver Architecture

The SPL-120 MK-II's 12-inch Cerametallic cone is a purpose-engineered diaphragm that applies a ceramic coating to a metallic substrate, producing a cone that is exceptionally light yet structurally rigid across its full operating range. The ceramic layer raises the speed of sound through the material significantly, pushing resonance breakup modes well above the driver's operating bandwidth. This means the cone behaves as a near-perfect piston throughout its entire working range, translating amplifier power directly into controlled air movement with minimal coloration or distortion. The Cerametallic cone is bonded to a dual-layer, copper-wound voice coil for superior electrical conductivity, and the driver assembly is housed in a non-resonating stamped-steel basket secured to a large magnet motor for consistent efficiency and low distortion under sustained output demands. This same driver family is used across Klipsch's Reference Premiere loudspeaker line, ensuring tonal coherence when the SPL-120 MK-II is paired with Reference Premiere tower, bookshelf, or surround speakers.

Aerofoil Slot Port and Class D Amplifier Technology

Port noise is one of the most common limitations in high-output subwoofer design. At high excursion levels, air velocity through a conventional port becomes turbulent, producing audible chuffing and distortion that obscures low-frequency detail. The SPL-120 MK-II addresses this with Klipsch's proprietary Aerofoil front-firing slot port, which uses internal flare geometry to smooth airflow across the full dynamic range of the driver. The result is clean, undistorted low frequencies even during the most demanding home theater passages. The port's front-firing orientation also decouples the sub's bass output from rear wall proximity, eliminating the room-loading resonances that affect rear-ported designs placed close to walls. The built-in amplifier uses an analog preamp stage that preserves the original signal path from the receiver to the driver, followed by a high-efficiency Class D output stage that converts virtually all electrical input into acoustic output with minimal heat generation and a standby consumption of just 0.5 watts.

Key Features

• Spun Copper Front-Firing Cerametallic Woofer: A newly designed 12-inch diaphragm combining ceramic rigidity with low mass delivers exceptional low-frequency linearity, minimal cone breakup, and high output with less amplifier power than conventional driver materials.
• Dual-Layer Copper-Wound Voice Coil: Cerametallic cones are bonded to a dual-layer, copper-wound voice coil for maximum electrical conductivity, efficient power transfer, and reduced thermal compression at sustained output levels.
• Non-Resonating Stamped-Steel Basket: The driver is housed in a stamped-steel basket secured to a large magnet motor, providing a rigid, acoustically neutral platform that maintains driver alignment and efficiency across the full dynamic range.
• High-Efficiency Class D Amplifier with Analog Preamp Stage: A 300-watt RMS (600-watt peak) Class D output stage is preceded by a fully analog preamp circuit that preserves signal integrity from input to driver, delivering accurate, true-to-source bass reproduction.
• Aerofoil Front-Firing Slot Port with Internal Flare Geometry: Proprietary internal port geometry smooths airflow at all output levels, eliminating port turbulence and chuffing for clean, undistorted low frequencies during the most demanding program material.
• WA-2 Wireless Subwoofer Kit Compatible: The optional Klipsch WA-2 Wireless Subwoofer Kit (sold separately) enables high-resolution wireless connectivity, allowing the SPL-120 MK-II to be placed anywhere in the room with a power outlet. Up to four WA-2 kits can be connected to compatible Klipsch subwoofers in a single room.
• Simultaneous RCA and Wireless Inputs: Both the line-level RCA input and the WA-2 wireless input can be used simultaneously, enabling a single subwoofer to serve a home theater receiver and a two-channel system in the same room without switching inputs.
• Low Pass Crossover and Variable Phase Controls: A continuously variable low-pass filter (40-120 Hz) and variable phase control allow the SPL-120 MK-II to be tuned precisely to any room and any combination of Klipsch speakers.
• Line Level and LFE RCA Inputs: Left and right line-level RCA inputs, with one doubling as a dedicated LFE input, ensure compatibility with all home theater AV receivers.
• 0.5-Watt Standby Mode: An ultra-low standby power draw of just 0.5 watts meets global energy efficiency standards while maintaining full auto-wake responsiveness from a connected source.
• Scratch-Resistant Ebony Finish: A premium scratch-resistant ebony vinyl finish covering the entire cabinet replicates the look of stained wood grain and coordinates aesthetically with the Reference Premiere speaker lineup.
• Premium Construction Details: Rounded cabinet corners, shock-absorbing rubber feet, steel grille posts, and a woven cloth grille deliver a finished, premium appearance and protect the driver from accidental contact.

Technical Specifications

Connections at a Glance

• Left/Right Line Level RCA Inputs: Standard stereo RCA inputs compatible with all home theater AV receivers and two-channel preamplifiers
• LFE Input: Dedicated low-frequency effects RCA input for direct connection to the subwoofer output of any home theater receiver
• WA-2 Wireless Port: Proprietary port for the optional Klipsch WA-2 Wireless Subwoofer Kit, enabling cable-free placement anywhere in the room
• Simultaneous Input Use: RCA and wireless inputs can be used at the same time for connection to multiple systems without switching

Frequently Asked Questions

What is the Klipsch SPL-120 MK-II?

The Klipsch SPL-120 MK-II is a 12-inch powered home theater subwoofer from the Reference Premiere SPL Series, featuring a spun copper Cerametallic front-firing woofer, a 300-watt RMS Class D amplifier with an analog preamp stage, a proprietary Aerofoil front-firing slot port, and a frequency response of 24 to 125 Hz. It is manufactured by Klipsch Group, Inc. in Indianapolis, Indiana, USA, and is the second-generation update to the original SPL-120 with a redesigned driver for improved output, lower distortion, and greater efficiency.

How does the Klipsch SPL-120 MK-II compare to the SVS SB-2000 Pro and REL T/9x?

The Klipsch SPL-120 MK-II, SVS SB-2000 Pro, and REL T/9x are all well-regarded 12-inch powered subwoofers in a similar performance tier. The SVS SB-2000 Pro uses a sealed enclosure with DSP room correction and app control, offering tighter, more adjustable bass tuning for audiophile two-channel use. The REL T/9x uses a rear-ported design with a high-level speaker-level input connection favored by audiophiles integrating a sub with stereo amplifiers. The SPL-120 MK-II's advantage is its Cerametallic driver coherence with Klipsch Reference Premiere speakers, its Aerofoil slot port for placement flexibility, and its simultaneous dual-input capability that allows connection to both a home theater receiver and a two-channel system at once without any source switching.

Can the Klipsch SPL-120 MK-II be used wirelessly?

Yes, the SPL-120 MK-II supports wireless operation via the optional Klipsch WA-2 Wireless Subwoofer Kit, sold separately. The WA-2 kit connects to the dedicated WA port on the rear of the subwoofer and transmits a high-resolution 2.4 GHz wireless audio signal from a transmitter connected to the source system. Up to four WA-2 kits can be used simultaneously with compatible Klipsch subwoofers in the same room. Importantly, the wireless input and the wired RCA input can both be active at the same time, making it possible to connect two separate systems to a single subwoofer.

What is Cerametallic cone technology?

Cerametallic is a proprietary Klipsch cone material that applies a ceramic coating to a metallic diaphragm substrate. The ceramic layer substantially increases the rigidity and internal damping of the cone, pushing resonance breakup modes well above the driver's intended operating frequency range, while the metallic base keeps the overall cone mass exceptionally low. The result is a driver that behaves as a near-perfect piston throughout its bass operating range, producing high output with minimal distortion and excellent transient accuracy. Cerametallic cones are also bonded to dual-layer copper-wound voice coils, further improving power handling and conductivity. The same Cerametallic technology is used across Klipsch's Reference Premiere loudspeaker woofers, ensuring tonal compatibility between the SPL-120 MK-II and Reference Premiere speakers.

What speakers pair best with the Klipsch SPL-120 MK-II?

The SPL-120 MK-II is designed as a system-matched subwoofer for the Klipsch Reference Premiere loudspeaker family, including the RP-8000F and RP-6000F tower speakers, the RP-600M bookshelf speakers, and the RP-504C center channel. The shared Cerametallic driver technology and acoustic design philosophy across the Reference Premiere line ensures tonal continuity between the subwoofer and the satellite speakers. The SPL-120 MK-II's variable low-pass filter (40 to 120 Hz) allows crossover alignment with both large-driver floor-standing speakers and smaller two-way bookshelf designs.

Is the Klipsch SPL-120 MK-II suitable for both home theater and music listening?

Yes, the SPL-120 MK-II is well suited for both home theater and music reproduction. The analog preamp stage preserves signal integrity and avoids the digital processing artifacts that can reduce musical accuracy in DSP-based designs. The Aerofoil slot port delivers clean, low-distortion bass that works equally well for LFE film soundtracks and the naturally extended bass of acoustic music recordings. The simultaneous dual-input capability is particularly useful for listeners who run a home theater system and a separate two-channel system in the same room, as both can remain connected and active without any manual switching.

Where can I buy the Klipsch SPL-120 MK-II in Toronto or Canada?

The Klipsch SPL-120 MK-II is available at Vinyl Sound, an authorized Klipsch dealer in Toronto, Canada. Vinyl Sound carries the complete Reference Premiere SPL Series subwoofer lineup and can assist with speaker system matching, crossover setup, and WA-2 wireless integration for home theater and two-channel systems across the Greater Toronto Area and Canada.