Infinity Modulus MSW-II subwoofer in silver — front view with the grille off, 12-inch driver visible

Infinity Modulus MSW-II subwoofer — angled view showing the cabinet

Infinity

Infinity Modulus MSW-II 12″ Powered Subwoofer – 600W Peak

Name: Infinity Modulus MSW-II 12" Powered Subwoofer – 600W Peak
Brand: Infinity
SKU: 14523
Price: 495.00 CAD
Availability: InStock

$495.00

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Description

Infinity Modulus MSW-II 12″ Powered Subwoofer – 300W RMS, Silver

The Infinity Modulus MSW-II is a high-performance 12-inch powered subwoofer designed to anchor Infinity’s Modulus II home theater system, combining a 300-watt RMS amplifier, a CMMD ceramic-cone driver, and the proprietary R.A.B.O.S. room optimization system in a compact, silver-trimmed enclosure. This example is in very good condition and has been fully tested to confirm strong, clean output and proper operation of all controls.

At the heart of the MSW-II is a 12″ CMMD (Ceramic Metal Matrix Diaphragm) woofer — the same driver material Infinity employed in its higher-end reference lines — driven by a dedicated 300-watt RMS (600-watt peak) internal amplifier. The sealed-box, magnetically shielded cabinet focuses on accurate, low-distortion bass rather than exaggerated output, delivering a rated frequency response of 27 Hz to 100 Hz (±3 dB) — genuine deep bass that extends well below most program content.

R.A.B.O.S. (Room Adaptive Bass Optimization System) is among the MSW-II’s most practical features: it provides parametric EQ adjustment that allows the user to identify and tame the primary bass resonance of their room, producing tighter, more natural low frequencies rather than the bloated one-note bass that afflicts many rooms and subwoofers. The crossover is fixed at 100 Hz (12 dB/octave), integrating cleanly with most small satellite and bookshelf speakers. The silver / platinum finish with complementary trim was designed to match the Modulus II satellite and center speakers, but it looks equally at home alongside other brands in a modern or vintage home theater setup.

Key Specifications – Infinity Modulus MSW-II

Driver: 12″ CMMD (Ceramic Metal Matrix Diaphragm) magnetically shielded woofer

Amplifier power: 300 W RMS / 600 W peak

Frequency response (±3 dB): 27 Hz – 100 Hz

Crossover: Fixed 100 Hz, 12 dB/octave

Room EQ: R.A.B.O.S. (Room Adaptive Bass Optimization System) parametric EQ

Enclosure: Sealed, magnetically shielded

Finish: Platinum/silver

Dimensions (H × W × D): 16¾” × 14½” × 18⅛” (425 × 368 × 460 mm)

Weight: 44 lbs (20 kg)

Cosmetic condition:
This silver MSW-II is in very good cosmetic condition. Cabinet and trim show only light signs of careful home use, with no significant dents, scratches, or damage. All controls, connections, and indicators are clean and fully functional, and the unit has been thoroughly tested to confirm proper amplifier operation and strong, controlled bass output.

A substantial, CMMD-driven Infinity Modulus MSW-II delivering 300 W RMS with genuine 27 Hz bass extension and R.A.B.O.S. room optimization — a serious powered subwoofer for enthusiasts seeking accurate, deep bass from a proven Infinity design.

Backed by Radique Audio’s 90-day warranty and our perpetual trade-back policy, you can purchase with confidence.

⭐ Don’t Just Take Our Word For It

Radique Audio holds over 600 customer ratings averaging 4.97 stars across six public platforms — Facebook Marketplace, Kijiji, Canuck Audio Mart, Google and others. Every rating lives somewhere we don’t control, so you can read the originals yourself, including the less flattering ones. See what our customers say. 👉

$495.00

Additional information

Weight	46 lbs
Dimensions	22.1 × 18.5 × 20.75 in

About brand

Infinity at Radique

We service Infinity, too. Bring us your own Infinity speakers and subwoofers for repair, servicing or restoration (speakers up to 80 lbs each), with a 90-day warranty on the work. See our Audio Service page

Infinity was founded in Los Angeles in 1968 by aerospace engineers Arnie Nudell and John Ulrick, with Cary Christie, and its first speaker was the electrostatic Servo-Statik. We carry Infinity towers, bookshelf speakers, centre channels and subwoofers. We've had more than 45 Infinity listings so far, covering more than 30 different models. Every used Infinity here is inspected, tested and serviced as required, then photographed in-house and covered by our Bumper-to-Bumper Warranty and Perpetual Trade-Back Program. Don't see the model you want? Tell us on First Dibs and we'll email you when one arrives.

Our best-selling Infinity models so far: the Beta 40 towers, then the Interlude IL25C centre, IL30 and IL40 towers and IL36C centre.

The Infinity story

Arnie Nudell and John Ulrick, aerospace engineers at Litton Industries, left with Cary Christie in 1968 to build speakers, starting in Nudell's garage. Their Servo-Statik combined electrostatic panels with a servo-controlled woofer, an idea from their aerospace work, and sold for $2,000 a pair.

EMIT and the reference years. In the late 1970s the Quantum line and the low-priced Qa, Qb and Qe brought in Infinity's EMIT tweeter, a flat plastic diaphragm with etched conductors, and Stereo Review called the $145 Qa one of the best loudspeaker values on the market. Infinity's flagship reference systems arrived at the end of the 1970s, and in Canada its speakers came in through Gray Acoustics of Markham, Ontario.

Harman. Infinity has been part of Harman International since the mid-1980s, and Samsung has owned Harman since 2017. The Kappa, Reference, Interlude, Primus and Beta lines followed through the 1990s and 2000s. In North America, Infinity now sells mainly car and marine audio.

Which Infinity is which?

1970s high end: the Servo-Statik, Monitor and Quantum models.

1970s and 1980s budget: the Qa, Qb and Qe, and the InfiniTesimal mini speakers.

Reference Standard and Kappa (1980s to 1990s): many numbered RS models, and Kappa towers and subwoofers.

Interlude (2000 to 2001): the IL10 bookshelf, the IL30 to IL60 towers, the IL25C and IL36C centres and IL subwoofers, with Infinity's ceramic metal matrix drivers. Infinity lists the IL30 and IL40 as made in the USA.

Primus and Beta (2003 to 2010): such as the Primus 250 and 360 towers, and the Beta bookshelf speakers and subwoofers.

Later lines: Cascade, Classia, TSS and the Reference series of 2014.

Buying used Infinity: what to check

Swap channels first. Infinity's own advice: if one speaker of a pair is silent or distorted, swap amplifier channels. If the fault follows the speaker, look for a loose wire, a bad crossover or a bad driver.

Crossovers. Inspect the crossover board for parts that look burnt or bulged.

Tweeters. Check that every tweeter, EMIT tweeters included, plays at low and moderate levels.

Powered models. Test the bass amplifier of any powered subwoofer or tower at volume.

Parts. Infinity lists no replacement parts for models such as the Interlude series, so replacement drivers come from donor speakers.

Everything we list is inspected, tested and serviced as required here, and comes with our warranty.