Baris
Good, high quality for the price.
Comment from July 15, 2025 — Experience from January 18, 2024
Specifications and features
Awards
EISA Awards: Award-Winning Product
Each year, dozens of European journalists gather to select the best electronic products of the year. Awarded by a diverse and impartial jury, the EISA (Expert Imaging and Sound Association) awards recognize exceptional products for their performance, design, or ergonomics.
Overview
The Polk Audio R350 center speaker stands out in the Reserve lineup with its ultra-compact profile at just 141 mm high, while incorporating five drivers derived from the flagship Legend series. Its 2.5-way configuration offers great versatility: it can be used horizontally as a center channel or vertically as a left/right speaker. Its fully sealed enclosure ensures exceptional vocal clarity by eliminating unwanted turbulence.
2.5-way configuration: a sophisticated technical approach
The R350’s 2.5-way topology deserves special attention. Unlike a classic two-way configuration where all woofers reproduce the same bandwidth up to the tweeter, or a three-way system with distinct sections, this hybrid approach optimizes horizontal directivity while maintaining exemplary time coherence.
In this configuration, the two central drivers handle the entire midrange up to the crossover with the tweeter at 2700 Hz, while the two outer drivers focus primarily on the low-midrange. This layout minimizes destructive interference among the four drivers in the mid frequencies that are critical for vocal intelligibility, thus avoiding off-axis lobing issues that would affect a speaker where all woofers play identically.
The fully sealed acoustic suspension cabinet is a deliberate technical choice that goes against the dominant bass-reflex designs. This approach completely eliminates turbulent port noise (chuffing) and other port-related distortions, ensuring crystal-clear dialogue reproduction even during intense dynamic passages. Strategically placed internal bracing and carefully tuned acoustic damping minimize internal standing waves and unwanted cabinet resonances.
Installation versatility and integration into the home environment
The R350 excels at adapting to modern spatial constraints. With its compact dimensions of 762 mm wide, 141 mm high, and 187.5 mm deep, it fits discreetly under most wall-mounted TVs or into TV furniture with limited space. Integrated four-position wall-mounting brackets allow horizontal installation for center-channel use, or vertical installation to create a coherent stereo front with three identical units.
This mounting flexibility addresses a recurring issue in contemporary home theater setups: the frequent inability to accommodate a bulky center speaker. The R350 thus helps maintain tonal consistency across the entire front soundstage, a crucial aspect for believable multichannel imaging. Integrated rubber feet effectively isolate the speaker from its surface, preventing the transmission of unwanted vibrations while protecting furniture finishes.
Low-diffraction, easily removable magnetic grilles preserve the clean aesthetics while minimizing their impact on sound dispersion. The cabinet’s rounded edges not only enhance visual elegance but also help reduce edge diffraction, promoting an open, natural soundstage.
Acoustic performance and compatibility with modern formats
Hi-Res Audio certification attests to the R350’s ability to faithfully reproduce high-resolution content up to 50 kHz, well beyond the human audible spectrum. This extension into the uppermost treble ensures unconstrained reproduction of high-order harmonics, contributing to a sense of space and naturalness that is especially pleasing with female vocals and acoustic instruments.
Native compatibility with Dolby Atmos and DTS:X, along with IMAX Enhanced certification, positions the R350 as a future-proof solution for current and upcoming home theater installations. The effective bandwidth of 75 Hz to 35 kHz (-3 dB) provides full coverage of the vocal range and the majority of musical content, while the 87 dB sensitivity allows efficient pairing with a wide range of amplifiers, from entry-level models to high-end electronics.
The nominal impedance compatible with 4, 6, and 8 ohm loads, with a minimum of 3.9 ohms, reflects a robust electrical design that won’t trouble modern amplifiers. The recommended power range of 25 to 200 watts offers considerable latitude in amplification choices, enabling use with both mainstream home theater amplifiers and more ambitious separate stereo electronics.
Technical Specifications
Acoustic System
- Pinnacle 25 mm tweeter
- 4 Turbine 100 mm mid-bass drivers
- Fully sealed enclosure: vibration elimination
- Low-diffraction magnetic grilles
- Wide binding post: easy installation
- High-Resolution (Hi-Res) certification
Audio Performance
- Overall frequency range: 50 Hz - 50 kHz
- Frequency response (-3 dB): 75 Hz - 35 kHz
- Recommended amplifier power: 25 - 200 W
- Amplifier compatibility: 8 Ω, 6 Ω, 4 Ω
- Minimum impedance: 3.9 Ω
- Sensitivity (2.83 V / 1 m): 87 dB
Dimensions and Weight
- Dimensions (W × H × D): 762 × 141 × 187.5 mm
- Weight: 9 kg
Frequently Asked Questions
What’s the main difference between the R350 and other center speakers in the Reserve range?
The R350 stands out with its ultra-slim 141 mm profile and its unique configuration featuring four 100 mm woofers in a 2.5-way arrangement. This design gives it exceptional versatility, allowing use as left, right, or center channel. The R300 and R400 adopt more traditional configurations with larger-diameter woofers but are less flexible in terms of placement.
Does the R350’s sealed design limit low-frequency extension?
The acoustic suspension design deliberately prioritizes precision and lack of coloration over maximum bass extension. With response down to 75 Hz (-3 dB), the R350 covers the full vocal range and integrates perfectly with a subwoofer crossed around 80–100 Hz, the standard home theater setup. This approach ensures superior vocal clarity without the turbulence inherent to bass-reflex designs.
Can you really use three R350s to create a complete front stage?
This setup is indeed one of the R350’s strengths. Using three identical speakers guarantees perfect tonal uniformity across the entire front soundstage, eliminating the discontinuities often noticeable during panning of sound effects. Vertical mounting for the left and right channels combined with horizontal placement for the center channel creates a coherent soundstage that’s particularly enjoyable in a home theater configuration.
What amplification is recommended for the R350?
With 87 dB sensitivity and a minimum impedance of 3.9 ohms, the R350 benefits from quality amplification without being overly demanding. A midrange AV amplifier delivering 80–100 watts per channel into 8 ohms will be more than sufficient for most setups. More ambitious configurations can fully exploit the speaker’s potential with separate amplification up to 200 watts.
How can I optimize R350 placement when used as a center channel?
Ideally, the tweeter should be at ear height or slightly below, with the speaker tilted toward the listening position if necessary. Placement directly below or above the screen, centered relative to it, ensures precise dialogue localization. A minimum distance of 30 cm from side walls will help prevent detrimental early reflections. Using the wall mounts allows precise adjustment of orientation.
User reviews
Thierry
Very good product.
Comment from December 09, 2024 — Experience from April 13, 2024
Automatically translated — Show original (French)
Très bon produit.
Eric
I recommend 100%. Be aware of the impressive size for a speaker, but it's night and day compared to my old one. Clear dialogue, finesse in the details. It has everything. Perfect.
Comment from September 23, 2021 — Experience from September 01, 2021
Automatically translated — Show original (French)
Je recommande à 100%. Attention taille impressionnante pour une centrale mais c'est le jour et la nuit par rapport à mon ancienne. Dialogue clair, finesse des détails. Tout y est. Parfait.
- Eco-contribution of €0.75 included in the sale price.
- Manufacturer reference: R350SYSBR
- GTIN / EAN: 747192134037
