Klipsch RP-504C II Reference Premiere Center Channel Speaker at Vinyl Sound Toronto Canada

The RP-504C II is a 2.5-way center channel speaker from Klipsch (Indianapolis, Indiana, USA), available at Vinyl Sound in Toronto, Canada. The second-generation flagship center channel of the Reference Premiere Series II lineup, it delivers comprehensive upgrades over the original RP-504C, including a larger Silicon Composite Hybrid Tractrix® Horn, redesigned Cerametallic™ woofers with 70% larger voice coils and aluminum Faraday rings, and a vented tweeter housing. The RP-504C II features quad 5.25" Cerametallic™ cone woofers with Faraday rings, a 1" titanium LTS vented tweeter mated to the enlarged 90° x 90° Silicon Composite Hybrid Tractrix® Horn, and a 96 dB sensitivity rating with a frequency response of 50 Hz to 25 kHz. It handles 150W continuous and 600W peak at 8 ohms, and is designed to anchor the front stage of a Reference Premiere Series II home theater system with crystal-clear dialogue reproduction across every seat in the room.

Silicon Composite Hybrid Tractrix® Horn and Titanium LTS Vented Tweeter

The acoustic centerpiece of the RP-504C II is its enlarged 90° x 90° Silicon Composite Hybrid Tractrix® Horn, which is dimensionally larger than the horn used in the original RP-504C. Klipsch's proprietary Tractrix® geometry maximizes the efficiency of high-frequency transfer from the tweeter to the listening area while controlling dispersion across a wider bandwidth, ensuring that dialogue remains focused and intelligible across a wide horizontal seating area. The phase plug and compression-molded silicone face smooth the frequency response at the horn throat, reducing resonances before they reach the listener. The 1" titanium LTS vented tweeter uses a low-mass titanium diaphragm extending the treble ceiling to 25 kHz, while the vented tweeter housing eliminates standing waves behind the diaphragm that would otherwise introduce unwanted harmonics into the high-frequency reproduction. Together, these elements produce the clarity and natural tonal character that makes dialogue sound as if the actors are speaking directly into the room.

Redesigned Cerametallic™ Woofers, Tractrix® Port, and Advanced Cabinet

The four 5.25" Cerametallic™ cone woofers in the RP-504C II have been comprehensively redesigned for the Series II generation. The voice coils are 70% larger in diameter than those in the original RP-504C, delivering substantially improved cone control, linearity, and power handling. New aluminum Faraday rings in the motor structure suppress eddy currents that cause nonlinear distortion, and the revised motor assembly improves transient response with greater speed and accuracy. Cerametallic™ combines the surface rigidity of a ceramic anodized aluminum finish with low mass, resisting cone flexing and breakup at high excursion levels. The rear-firing Tractrix® port uses Tractrix geometry with a custom inner flare to create laminar airflow, reducing port noise and turbulence for cleaner, punchier bass extension down to 50 Hz. The internally braced MDF cabinet minimizes resonance and vibration coloration throughout the frequency range, and cork pads replace conventional rubber bumpers for more secure and lower-resonance placement on a stand or AV furniture shelf.

Key Features

• 90° x 90° Silicon Composite Hybrid Tractrix® Horn: Enlarged second-generation horn with phase plug and compression-molded silicone face for maximum high-frequency efficiency, smooth frequency response, and controlled wide-angle dispersion across the full seating area.
• 1" Titanium LTS Vented Tweeter: Linear Travel Suspension tweeter with titanium diaphragm minimizes distortion; vented housing eliminates standing waves for cleaner, more detailed high-frequency reproduction extending to 25 kHz.
• Quad 5.25" Cerametallic™ Woofers with Faraday Rings: Redesigned woofers with 70% larger voice coils, aluminum Faraday rings, and an updated motor structure deliver reduced distortion, higher power handling, and faster, more accurate transient response.
• Rear-Firing Tractrix® Port: Tractrix-geometry port with custom inner flare reduces air turbulence and port noise for punchier, cleaner bass extension down to 50 Hz.
• 96 dB Sensitivity: High efficiency allows the RP-504C II to achieve high output levels with modest amplification, rated for 150W continuous and 600W peak at 8 ohms.
• Advanced Internally Braced MDF Cabinet: Additional internal bracing minimizes cabinet resonance and vibration coloration for improved sonic transparency and accuracy.
• Audiophile-Grade Wiring and Aluminum Binding Posts: Premium internal wiring connects to easily accessible single aluminum binding posts compatible with all common speaker wire terminations.
• Furniture-Grade Finishes: Available in ebony vinyl and walnut vinyl with satin-painted baffles and a scratch-resistant finish for a premium, room-friendly aesthetic.
• Magnetic Grille and Cork Pads: Magnetic grille attaches cleanly without visible clips; cork pads replace rubber bumpers for secure, low-resonance placement on stands or shelving.

Technical Specifications

Frequently Asked Questions

What is the Klipsch RP-504C II?

The Klipsch RP-504C II is a 2.5-way center channel speaker from the Reference Premiere Series II, featuring quad 5.25" Cerametallic™ cone woofers with Faraday rings, a 1" titanium LTS vented tweeter with a 90° x 90° Silicon Composite Hybrid Tractrix® Horn, and a 96 dB sensitivity rating. It covers 50 Hz to 25 kHz, handles 150W continuous and 600W peak at 8 ohms, and is available in ebony vinyl and walnut vinyl finishes. It is designed for use as the center channel in a Reference Premiere Series II home theater system.

How does the Klipsch RP-504C II compare to the RP-404C II or the Klipsch RC-64 III?

The Klipsch RP-504C II is the larger of the two Reference Premiere II center channel models, stepping up from the RP-404C II with four 5.25" woofers versus two, delivering higher maximum output and more powerful midrange presence for larger rooms. Compared to the flagship Klipsch RC-64 III, the RP-504C II uses a 1" titanium LTS vented tweeter and Silicon Composite Hybrid Horn where the RC-64 III employs a much larger 1.75" titanium compression driver and 6.25" cinema-derived horn, giving the RC-64 III a 3 dB sensitivity advantage at 99 dB and making it the appropriate choice for systems paired with Heritage Series floorstanding speakers.

What is the 2.5-way crossover design in the RP-504C II?

The RP-504C II uses a 2.5-way crossover with two different transition frequencies: 650 Hz and 1,950 Hz. The inner pair of woofers operates across the full bass and lower midrange while the outer pair begins to roll off at 650 Hz, reducing horizontal lobing artifacts that cause tonal inconsistency at off-center listening positions. Above 1,950 Hz the titanium LTS tweeter handles all high-frequency reproduction. This progressive attenuation of the outer woofers ensures consistent dialogue intelligibility and tonal character across a wider range of seating positions in the home theater.

What is the Cerametallic™ woofer material?

Cerametallic™ is Klipsch's proprietary woofer cone material combining the surface hardness and rigidity of a ceramic anodized aluminum finish with a low-mass structure that resists cone flexing and breakup at high excursion levels. In the RP-504C II, the Cerametallic™ cones are further enhanced with aluminum Faraday rings in the motor assembly, which suppress eddy currents within the voice coil gap to reduce nonlinear distortion, and 70% larger voice coils compared to the original RP-504C for improved power handling, cone control, and transient accuracy.

Can the Klipsch RP-504C II be used without a subwoofer?

The Klipsch RP-504C II's rear-firing Tractrix® port extends bass to 50 Hz, covering most cinematic dialogue and music content without a subwoofer. For full home theater use with bass management, Klipsch recommends crossing the RP-504C II over at 80 Hz to a subwoofer, which allows the center channel to focus on the midrange and treble content where dialogue intelligibility is concentrated, while the subwoofer handles the low-frequency effects channel. Compatible Klipsch subwoofer options include the SPL-100, SPL-120, and SPL-150 for Reference Premiere system pairings.

What system pairings work best with the Klipsch RP-504C II in Toronto?

The Klipsch RP-504C II is designed to anchor a Reference Premiere Series II front stage. Ideal pairings at Vinyl Sound include the RP-8000F II or RP-6000F II as front left and right floorstanding speakers, the RP-502S II as surround speakers, the RP-500SA II as Dolby Atmos elevation modules, and a Klipsch SPL-series subwoofer for bass management. AV receivers from Denon, Marantz, Anthem, and Yamaha in the 80 to 120 watts per channel range provide more than sufficient amplification for the RP-504C II's 600W peak handling capability.

Where can I buy the Klipsch RP-504C II in Toronto or Canada?

The Klipsch RP-504C II is available at Vinyl Sound, an authorised Klipsch dealer located in Toronto, Canada. Vinyl Sound carries the complete Klipsch Reference Premiere Series II lineup and provides expert guidance on finish selection, system matching, AV receiver pairing, and complete home theater configuration. Canadian customers can contact Vinyl Sound directly or shop online for shipping across Canada.