PSB Imagine W3 GLSB On-Wall Passive Soundbar at Vinyl Sound Toronto Canada

The Imagine W3 GLSB is a three-channel passive on-wall soundbar from PSB Speakers (Pickering, Ontario, Canada), available at Vinyl Sound in Toronto, Canada. Part of PSB's acclaimed Imagine Series, the W3 GLSB combines a full front-stage left, centre, and right speaker system into a single 46-inch extruded aluminum enclosure that mounts flush against the wall at just 3-1/8 inches depth. Three 1-inch titanium dome tweeters — the same dome developed for PSB's flagship Synchrony Series — pair with four 4-inch clay and ceramic reinforced polypropylene cone woofers and four passive radiators (PBRs) across three subdivided discrete internal chambers. The centre channel delivers 88 dB anechoic sensitivity with a frequency response of 100 Hz to 23,000 Hz (±3 dB); left and right channels deliver 85 dB anechoic at 90 Hz to 23,000 Hz (±3 dB). Passive operation requires an AV receiver. A wall-mount bracket and tabletop feet are included. Voiced at Canada's National Research Council by PSB founder Paul Barton.

Three Discrete Channels, Subdivided Chambers, and Passive Radiator Bass

The W3 GLSB's most important engineering distinction is that it is not a conventional soundbar. It is a three-channel passive speaker system — left, centre, and right — housed in a single enclosure, each channel with its own sealed, subdivided discrete internal chamber. This means the left and right channels do not share an enclosure with the centre, and the acoustic performance of each channel is determined by its own tuned volume rather than by whatever air mass happens to be inside the full cabinet. Each channel also uses a passive radiator (PBR) — two for the centre, one each for left and right — acoustically coupled to its woofer to extend bass output at the lowest frequencies without a port. This design delivers usable bass to approximately 90 Hz for the left and right channels and 100 Hz for the centre, approaching the standard 80 Hz subwoofer crossover point from a speaker only 3-1/8 inches deep. Paul Barton designed the centre channel to deliver 3 dB more sensitivity than the left and right channels, giving it double the headroom for the same amplifier power — a critical advantage for the dialogue-carrying centre channel in home theatre applications.

Synchrony Series Titanium Dome Tweeters and NRC Voicing

The W3 GLSB's three tweeters use the same 1-inch titanium dome developed for PSB's flagship Synchrony Series, the only difference being adaptation for the W3's horizontal on-wall installation geometry. Each tweeter features a specially engineered phase plug that extends high-frequency response by damping the tweeter's self-resonance and preventing phase cancellation in the uppermost musical octave. The result is a high-frequency response that extends cleanly to 23,000 Hz across all three channels, matching the top-end performance of PSB's freestanding Imagine Series bookshelf and tower speakers. Four 4-inch woofers with clay and ceramic reinforced polypropylene cones provide long-throw bass and midrange accuracy, with cone geometry optimised for the natural vocal range reproduction that is critical for dialogue intelligibility in film and television. Final voicing for the W3 GLSB was performed by Paul Barton at Canada's National Research Council, using the same IEC-standard baffle measurements used to voice PSB's conventional freestanding speakers.

Key Features

• Three-Channel Passive LCR Soundbar: Left, centre, and right channels in one 46-inch enclosure — passive operation requires connection to an AV receiver for amplification and processing.
• Subdivided Discrete Internal Chambers: Each channel operates in its own sealed acoustic chamber, preventing inter-channel interference and ensuring consistent performance from each channel independently of the others.
• Three 1-Inch Titanium Dome Tweeters (Synchrony Series Dome): The same titanium dome used in PSB's flagship Synchrony Series, with ferrofluid cooling and a phase plug for extended high-frequency linearity to 23,000 Hz.
• Four 4-Inch Clay and Ceramic Reinforced Polypropylene Cone Woofers: Long-throw woofers with optimised cone profiles deliver clear midrange and accurate vocal reproduction, critical for dialogue in film and television.
• Four Passive Radiators (PBRs): One passive radiator per woofer (two for the centre channel) extends bass output at the lowest frequencies, delivering usable bass to approximately 90 Hz (L/R) and 100 Hz (centre) from a 3-1/8-inch-deep enclosure.
• Centre Channel 3 dB More Sensitive than L/R: Paul Barton's deliberate sensitivity balance gives the centre channel double the headroom of the left and right channels for the same amplifier power, ensuring clear dialogue at all listening levels.
• Three Sets of Spring-Loaded Gold-Plated Binding Posts: One set per channel (left, centre, right) accepts bare wire, pin connectors, and banana plugs for AV receiver connection.
• Extruded Aluminum Cabinet with Non-Resonant MDF Front Baffle: The aluminum enclosure maximises internal volume and structural rigidity in a minimal exterior depth; the MDF baffle provides acoustic damping and precise driver positioning.
• Ultra-Slim 3-1/8-Inch Profile: At just 3-1/8 inches (79 mm) deep, the W3 GLSB mounts flush against the wall beneath or above a flat-panel display without projecting into the room.
• Wall-Mount Bracket and Tabletop Feet Included: Installs horizontally above or below a wall-mounted television using the supplied bracket; tabletop feet allow placement on a console or equipment stand.
• Cloth-Covered Metal Grille: An acoustically transparent cloth-covered metal grille integrates the W3 GLSB visually with the room without affecting acoustic performance.
• NRC Voicing by Paul Barton: Final voicing performed at Canada's National Research Council using IEC-standard measurement baffles to simulate on-wall installation conditions.

Technical Specifications

Connections at a Glance

• Three sets of spring-loaded gold-plated binding posts: left channel, centre channel, right channel
• Accepts bare wire, pin connectors, and banana plugs
• Passive operation: connect all three channel pairs to AV receiver speaker outputs
• Subwoofer connection recommended at or below 90 Hz; standard 80 Hz crossover is appropriate
• Wall-mount bracket included (adds 1/4 inch to mounted depth)
• Tabletop feet included for console or stand placement

Frequently Asked Questions

What is the PSB Imagine W3 GLSB?

The PSB Imagine W3 GLSB is a three-channel passive on-wall soundbar from PSB Speakers, designed and voiced in Pickering, Ontario, Canada. It combines the front left, centre, and right channels of a home theatre system into a single 46-inch extruded aluminum enclosure with three subdivided discrete internal chambers. It features three titanium dome tweeters, four clay and ceramic reinforced polypropylene cone woofers, and four passive radiators, and requires an AV receiver for amplification. A wall-mount bracket and tabletop feet are included.

How does the PSB Imagine W3 GLSB compare to the Definitive Technology W Studio Micro and GoldenEar Invisa HTR 7000?

The PSB Imagine W3 GLSB, Definitive Technology W Studio Micro, and GoldenEar Invisa HTR 7000 are all high-performance passive LCR on-wall speaker solutions targeting serious home theatre installations. The Definitive Technology W Studio Micro uses a powered built-in subwoofer alongside its passive midrange and tweeter array, adding its own bass amplification. The GoldenEar Invisa HTR 7000 uses folded ribbon tweeters and a passive subwoofer in an on-wall format. The W3 GLSB differentiates through its discrete three-channel architecture, Synchrony Series titanium dome tweeters, NRC-voiced passive radiator bass system, and the deliberate 3 dB sensitivity advantage engineered into the centre channel — a level of acoustic design discipline that most on-wall soundbars at any price do not attempt.

Does the PSB Imagine W3 GLSB need a separate amplifier or receiver?

Yes. The W3 GLSB is a passive speaker with no built-in amplification. It requires connection to an AV receiver with at least three discrete amplified speaker outputs — one each for the left, centre, and right front channels. The receiver handles all audio decoding, processing, bass management, and amplification. Any AV receiver rated for 8 ohm loads with per-channel power in the 50 to 150 watt range is appropriate. A subwoofer is also strongly recommended, as the W3 GLSB's useful bass output begins at approximately 90 Hz (L/R) and 100 Hz (centre).

What are the passive radiators in the W3 GLSB and how do they affect bass performance?

Passive radiators (PBRs) are unpowered, driver-like membranes that are acoustically coupled to the active woofers in the W3 GLSB's cabinet. They move in response to pressure changes created by the active woofers and behave similarly to a tuned port, extending bass output at the lowest frequencies without requiring an opening in the cabinet wall. In the W3 GLSB, each active woofer is paired with one passive radiator, with the centre channel using two woofers and two passive radiators for higher output and sensitivity. This system allows the W3 GLSB to approach the standard 80 Hz subwoofer crossover from an enclosure only 3-1/8 inches deep, a significant acoustic engineering achievement at this form factor.

Can the PSB Imagine W3 GLSB be used without a subwoofer?

The W3 GLSB can technically be used without a subwoofer, but PSB and independent reviewers strongly recommend pairing it with one. The W3 GLSB's useful bass output begins at approximately 85 to 100 Hz depending on the channel, which means frequencies below this range — where much of the bass content in film soundtracks and music resides — are not reproduced. Setting the AV receiver's crossover at 80 Hz and routing bass below that frequency to a subwoofer is the intended and optimal operating configuration for the W3 GLSB.

How is the PSB Imagine W3 GLSB different from a conventional powered soundbar?

A conventional powered soundbar contains its own built-in amplifier, digital processing, HDMI connectivity, and often Bluetooth or Wi-Fi, operating as a standalone device connected directly to a television. The W3 GLSB is a passive speaker with no built-in amplification or signal processing — it connects to an AV receiver exactly as three separate speakers would, using individual speaker cables for the left, centre, and right channels. This design allows the W3 GLSB to benefit from the AV receiver's full suite of audio decoding, room correction, and amplification resources, and delivers acoustic performance that compares directly to PSB's freestanding Imagine Series speakers rather than to the mass-market soundbar category.

Where can I buy the PSB Imagine W3 GLSB in Toronto or Canada?

The PSB Imagine W3 GLSB On-Wall Passive Soundbar is available in Toronto, Canada at Vinyl Sound, an authorised PSB Speakers dealer. Vinyl Sound can advise on AV receiver pairing, subwoofer matching, and complete front-stage and surround-sound system design using the W3 GLSB alongside PSB Imagine Series and CustomSound speakers. Customers across Canada are welcome to contact Vinyl Sound for purchasing and shipping inquiries.