Klipsch SLM-5400-C In-Ceiling Speaker at Vinyl Sound Toronto Canada

The SLM-5400-C is a shallow-depth 4" two-way in-ceiling speaker from Klipsch (Indianapolis, Indiana, USA), available at Vinyl Sound in Toronto, Canada. Part of the Klipsch Reference 5000 architectural series and the SLM (Shallow Depth) lineup, it is engineered specifically for installations where standard ceiling depth is unavailable. At just 50 mm (approximately 2 inches) of mounting depth with a fully enclosed fire-rated galvanized metal back box included, the SLM-5400-C installs in ceiling cavities that would be physically impossible for conventional in-ceiling speakers. It combines a 4" Cerametallic woofer and a 1" Titanium Dome Tweeter with a custom Tractrix Horn, delivering a frequency response of 90 Hz to 20 kHz at 91 dB sensitivity. For homes with I-joists, concrete slab ceilings, dropped ceilings with minimal plenum space, or thinly constructed multi-story buildings, the SLM-5400-C is the premium architectural audio solution available at Vinyl Sound in Toronto and across Canada.

Big Sound, Slim Package: The 50mm Shallow-Depth Advantage

The SLM-5400-C's defining characteristic is its 50 mm total enclosure depth, achieved through a purpose-designed ported ABS baffle paired with an ultra-slim galvanized metal back box. Standard residential in-ceiling speakers typically require between 100 mm and 170 mm of ceiling cavity depth to accommodate their enclosure and driver assembly. The SLM-5400-C requires just 50 mm, making it suitable for engineered lumber I-joist construction where the floor system reduces available plenum height, concrete or composite decking in commercial-to-residential conversions, drop ceilings with minimal gap between the tile grid and the structural floor above, and any room where a conventional in-ceiling speaker physically cannot be installed. Klipsch achieves this minimal depth by mounting the entire driver assembly in a shallow ported ABS baffle and enclosing it in a fire-rated metal back box that is included with every unit, giving the SLM-5400-C a built-in acoustic enclosure without requiring any additional ceiling cavity volume.

Fire-Rated Galvanized Metal Back Box with Ported Acoustic Design

The ultra-slim galvanized metal back box included with every SLM-5400-C provides several critical performance and safety functions simultaneously. As a fully enclosed acoustic enclosure, it isolates the rear of the 4" Cerametallic woofer from the ceiling cavity, ensuring consistent bass loading and low-frequency response regardless of the volume or acoustic properties of the space above the ceiling. The ported ABS baffle extends low-frequency output below what a sealed enclosure of the same depth could achieve, producing usable bass down to 90 Hz from a driver configuration that occupies only 50 mm of depth. The galvanized steel construction is fire-rated, meeting the enclosure requirements for installations in wall and ceiling cavities subject to building code fire resistance requirements across Canada and in multi-dwelling residential construction. This built-in, fire-rated enclosure eliminates the need for a separately purchased back box that most standard in-ceiling speakers require for code compliance in these environments.

4" Cerametallic Woofer and 1" Titanium Dome Tweeter with Tractrix Horn

Despite its compact 4" woofer size and extreme shallow depth, the SLM-5400-C uses driver materials drawn from the Klipsch Reference 5000 architectural series. The 4" Cerametallic woofer uses a metal cone hard-anodized on both surfaces, producing a high stiffness-to-mass ratio that delivers tight, accurate bass and clear midrange reproduction despite the compact driver diameter. The 1" Titanium Dome Tweeter is mated to a custom-designed round Tractrix Horn that controls high-frequency dispersion and provides horn-loaded efficiency, delivering detailed, focused highs to 20 kHz. This combination of Cerametallic woofer, Titanium dome tweeter, and Tractrix Horn brings the acoustic quality level of the Reference 5000 architectural series into a speaker that is physically smaller than most alternatives designed for constrained installations, providing a meaningful performance advantage over compact in-ceiling speakers that use lower-grade cone materials and conventional dome tweeters without horn loading.

Key Features

• 50 mm Shallow Mounting Depth with Included Fire-Rated Back Box: The entire speaker assembly, including its fully enclosed galvanized metal fire-rated back box, installs in just 50 mm of ceiling cavity depth. This is among the shallowest mounting profiles available in a quality two-way in-ceiling speaker, enabling installation in I-joist construction, concrete deck ceilings, drop ceilings, and thin-floor multi-story buildings where standard in-ceiling speakers cannot fit.
• 4" Cerametallic Woofer: Hard-anodized metal cone from the Klipsch Reference 5000 architectural series delivers a high stiffness-to-mass ratio for tight, accurate bass and clean midrange, providing Reference-grade driver quality in a compact 4" format suited to the SLM-5400-C's shallow enclosure.
• 1" Titanium Dome Tweeter with Custom Round Tractrix Horn: Titanium dome tweeter with Klipsch's Tractrix Horn geometry delivers focused, detailed high-frequency output to 20 kHz. Horn loading increases tweeter efficiency and controls dispersion, producing clearer high-frequency reproduction than an equivalent non-horn-loaded titanium dome tweeter in the same shallow enclosure format.
• 91 dB Sensitivity, 120W Peak Power Handling: High efficiency enables adequate output from standard AV receivers and distributed audio amplifiers. The 120W peak power handling provides dynamic headroom well beyond the recommended 50W amplifier power, protecting the driver during transient peaks.
• Ported ABS Baffle for Extended Low-Frequency Output: The ported baffle design extends bass output below what a sealed enclosure of the same minimal depth could achieve, maximizing low-frequency performance from the 4" Cerametallic woofer within the 50 mm depth constraint.
• SlimTrim Flat Magnetic Grille, Round and Square Included: The flat minimum-bezel magnetic grille creates a modern, discreet appearance with minimal visual intrusion into the ceiling. Both round and square grille options are included in the box to match any ceiling design or interior aesthetic.
• 8-Ohm Nominal Impedance, 12-Gauge Wire Compatible: Standard 8-ohm impedance ensures broad compatibility with all AV receivers, stereo amplifiers, and distributed audio systems. Wiring terminals accept up to 12-gauge speaker wire for low-resistance runs in larger installations.
• Compatible with IK-650-C Install Kit: The optional IK-650-C installation kit (sold separately) is recommended for new construction rough-in, providing pre-wire brackets and marking aids for installation before drywall is applied.

Technical Specifications

What's in the Box

• Klipsch SLM-5400-C In-Ceiling Speaker (1 unit)
• Ultra-Slim Galvanized Metal Fire-Rated Back Box (integrated)
• Round Flat Magnetic Grille
• Square Flat Magnetic Grille
• Note: Installation Kit IK-650-C sold separately

Frequently Asked Questions

What is the Klipsch SLM-5400-C?

The Klipsch SLM-5400-C is a shallow-depth 4" two-way in-ceiling speaker from the Reference 5000 architectural series, featuring a 4" Cerametallic woofer, a 1" Titanium Dome Tweeter with a custom Tractrix Horn, 91 dB sensitivity, and 8-ohm impedance. It installs in just 50 mm (1.97 inches) of ceiling depth with a fully enclosed, fire-rated galvanized metal back box included, making it one of the shallowest in-ceiling speakers available for residential and commercial installation where standard ceiling cavity depth is unavailable.

Where is the Klipsch SLM-5400-C used when a standard in-ceiling speaker will not fit?

The Klipsch SLM-5400-C is specifically designed for installation scenarios where a standard in-ceiling speaker cannot fit. Common applications in Toronto and across Canada include engineered I-joist floor systems where the joist depth significantly reduces available plenum height, concrete or composite slab ceilings in converted commercial or industrial buildings, multi-story residential construction with thin floor assemblies between levels, drop-ceiling installations with a narrow gap between the tile grid and the structure above, and rooms where HVAC, plumbing, or electrical systems consume most of the ceiling cavity space. Any situation where the available depth above the ceiling surface is less than approximately 100 mm makes the SLM-5400-C's 50 mm profile the practical solution.

Does the Klipsch SLM-5400-C include a back box, and is it fire-rated?

Yes, the Klipsch SLM-5400-C includes an ultra-slim galvanized metal back box that is integral to the speaker assembly and ships with every unit. The galvanized steel construction is fire-rated, making it suitable for installations in wall and ceiling cavities subject to fire resistance requirements under Canadian and North American building codes. The enclosed back box also serves as the speaker's acoustic enclosure, isolating the rear of the 4" Cerametallic woofer from the ceiling cavity and providing the consistent acoustic loading required for accurate bass response. Unlike most standard in-ceiling speakers that require a separately purchased back box for fire-code compliance, the SLM-5400-C's back box is included in the box at no additional cost.

How does the Klipsch SLM-5400-C compare to the Sonance 4R or Polk Audio 65-RT for shallow-ceiling installations?

The Klipsch SLM-5400-C differentiates itself from the Sonance 4R and Polk Audio 65-RT in both driver materials and included enclosure. The SLM-5400-C uses a Cerametallic woofer and Titanium Dome Tweeter with Tractrix Horn from the Klipsch Reference 5000 architectural series, while the Sonance 4R uses conventional drivers without horn-loaded tweeter technology and the Polk Audio 65-RT does not offer a purpose-built shallow-depth format with an integrated fire-rated enclosure. The SLM-5400-C's included fire-rated galvanized metal back box eliminates the need for a separate enclosure purchase that Sonance and other manufacturers charge additionally for, and its 50 mm total depth is specifically engineered for the shallow-ceiling scenarios where both the Polk Audio and Sonance standard in-ceiling options cannot be installed at all.

What amplifier power does the Klipsch SLM-5400-C require?

The Klipsch SLM-5400-C is compatible with any standard AV receiver, stereo amplifier, or distributed multi-room amplifier rated for an 8-ohm load. Klipsch recommends 50W of amplifier power for typical use, and the 91 dB sensitivity means the speaker produces adequate output from modest power levels. The 120W peak power handling provides substantial dynamic headroom above the recommended amplifier power, protecting the speaker during loud transient passages in music and film. Standard multi-zone distributed audio amplifiers used in whole-home audio systems across Toronto and Canada are fully compatible with the SLM-5400-C without requiring any special high-power amplification.

Can the Klipsch SLM-5400-C be installed in a bathroom or kitchen ceiling?

The Klipsch SLM-5400-C is designed for standard indoor residential and commercial environments and is not rated for moisture-exposed or outdoor installation. For bathrooms, kitchens, or other high-humidity spaces in Toronto and across Canada, Klipsch's moisture-rated or outdoor architectural speaker models should be specified instead. However, the SLM-5400-C's included fire-rated metal back box makes it appropriate for installation above suspended ceiling tiles in commercial kitchens and restaurant dining areas where the ceiling plenum is shallow, provided the speaker itself is not directly exposed to steam, water spray, or condensation at the grille surface.

Where can I buy the Klipsch SLM-5400-C in Toronto or Canada?

The Klipsch SLM-5400-C is available at Vinyl Sound, an authorized Klipsch dealer in Toronto, Canada. Vinyl Sound carries the full Klipsch SLM Shallow Depth series and Reference 5000 architectural lineup and can assist with speaker selection, shallow-ceiling installation planning, and system design for whole-home audio projects throughout the Greater Toronto Area and across Canada.