Infinity Beta 40 tower speakers — front view with grilles off, four drivers visible

Infinity Beta 40 towers — angled view of the pair

Infinity

Great sounding quality 4-Driver Towers from Infinity Beta 40

Name: Great sounding quality 4-Driver Towers from Infinity Beta 40
Brand: Infinity
SKU: 7767
Price: 495.00 CAD
Availability: InStock

$495.00

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Description

The Betas are our favourite mid-range series from Infinity. We’ve been using a pair of trusty Beta 50’s in our primary listening area for the past several years, and we’d used Beta 40’s previously for the same application. We had them set up in a bi-wired configuration, and they sound extremely impressive for this price point.

Music and movie lovers will find a lot to like in Infinity’s Beta 40. This slender tower speaker uses Infinity’s most advanced drivers to produce a wide soundstage and precise imaging. Its solid MDF cabinet houses a 1″ tweeter, a 5″ midrange, and dual 6-1/2″ woofers. You’ll enjoy detailed, accurate highs and mids plus distinct, musical bass.

This speaker owes its open, natural sound to Infinity’s patented Ceramic Metal Matrix Diaphragm driver material — the same material Infinity uses in their top-of-the-line models. CMMD™ combines layers of ceramic with a stiff metal core for crystal-clear sonic performance. It’s strong and durable, yet incredibly lightweight and responsive.

Features and Specifications

Features: video-shielded, bass-reflex (ported) enclosure, two sets of quality 5-way binding posts for bi-wiring, innovative metal grills (great for preventing small hands from denting the domes or cones)

Power Handling of 200 Watts at 8 Ohms impedance, Frequency response 45-20,000 Hz (±3dB), Sensitivity of 91 dB

Drivers: 3-way design featuring: 1″ CMMD tweeter, 5″ CMMD midrange driver, dual 6-1/2″ CMMD woofers

Dimensions: 8-7/8″W x 38-5/16″H x 13-3/8″D. Weight: 50.26 pounds each.

MSRP of $800 USD. This pair is in very good cosmetic and sonic condition. Asking just $495 Canadian.

🚚 Shipping Note for This Item

Due to its size, weight, or fragility, this product cannot be shipped by standard courier — but we’ve got you covered. We offer two great alternatives:

Personal delivery — We deliver in-person anywhere along the Windsor–Québec City corridor, carefully and on your schedule.

Freight shipping — We ship skid-mounted via freight carrier to anywhere in Canada, and we stand behind it — if something arrives damaged, we make it right.

Full details on both options are on our Curbside Delivery page. 👈

Ready to make it yours? To hold the item and avoid missing out, go ahead and purchase using Local Pickup at checkout — then contact us to arrange delivery or freight for an additional fee. We’ll take it from there!

⭐ 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	105.52 lbs
Dimensions	17 × 24 × 42.25 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.