Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
Product Strengths
- Designed to be minimally invasive and slip easily and undetected into any environment
- Polk has minimized the thickness, making it easy to install in most homes
- Build quality is good and the weight has been kept nice and low
- When set up correctly, it projects well and directly forward and has a slight lean to a warmer tone, but nonetheless has great clarity
Product Considerations
- Installing in-wall speakers is not easy, and professional installation is recommended
- Requires a separate amplifier and a way to connect sound to it
- Installation is not recommended if there is no space behind drywall or on solid surfaces like concrete or stone
- Polk's logo on the grill might be a minor aesthetic issue for some who want it to be inconspicuous
- Sound is not really relevant when evaluating the speaker on its own, as it's designed to be used as part of a full system
Takeaway: The Polk Audio 255c-RT is a great addition to a home theatre sound system, especially when paired with other speakers from the Polk Audio RT line. It has good build quality, and its unobtrusive design makes it a solid choice for creating a multi-directional audio experience for watching movies.
All
255C-RT
reviews

Manufacturer details
- Total Frequency Response: 30 Hz → 27,000 Hz
- Lower and Upper -3dB Limits: 50 Hz → 25,000 Hz
- Nominal Impedance: 8 ohms
- Sensitivity: 90 dB/1W/1m
- Recommended Amplifier Power: 10-150 watts
- Driver Complement: (2) 5.25" Dynamic Balance Mineral Composite Polypropylene Cone Mid/Woofers, (1) 1" Dynamic Balance Silk Polymer Composite Dome Tweeter
- Dimensions: 7.625" (19.37 cm) h x 13.125" (33.34 cm) w
- Mounting Depth: 3.875" (9.84 cm)
- Weight: 6.6 lbs (2.99 kg)
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- They stand out for incorporating technologies typically found in their higher-end lines, such as ring radiator tweeters and Power Port designs, into more accessible product lines like the Monitor and Signature Elite series.
- Polk specifically designs many of their speakers, especially in-wall and outdoor models, to be versatile and weather-resistant, making them suitable for a variety of listening environments beyond traditional living rooms.
Select products
Monitor XT70
- Positioning: The highest performing loudspeaker in the Monitor XT line.
- Description: Offers powerful, high-resolution sound with dual 6.5" Dynamic Balance woofers and 8" passive bass radiators, making it ideal for larger rooms. Compared to the Signature Elite series, focuses on delivering impactful bass and clear highs, suitable for those who want a high-value option for music and movies without the need for advanced features like Dolby Atmos compatibility.
Signature Elite ES55
- Positioning: A high-quality floor-standing tower speaker in the Signature Elite series.
- Description: Provides high-resolution, room-filling sound with dual 6.5" Dynamic Balance woofers and Terylene dome tweeter. Unlike the Monitor XT70, offers a more refined sound with Hi-Res Audio certification, appealing to those who prioritize audio detail and clarity over sheer power.
Signature Elite ES60
- Positioning: The highest-performing loudspeaker in the Signature Elite series.
- Description: Delivers cinematic sound with three 6.5" Dynamic Balance woofers and Hi-Res Audio certified tweeter. Offers a more immersive experience compared to the ES55, with enhanced bass and a broader soundstage.
Reserve R700
- Positioning: A premium large floor-standing tower speaker in the Reserve series.
- Description: Combines dual 8" woofers and a 6.5" Turbine Cone woofer for massive impact and clarity. Stands out from the Signature Elite series with its advanced Power Port 2.0 and X-Port technology, providing cleaner bass and more defined midrange.
Legend L600
- Positioning: A flagship floor-standing tower speaker in the Legend series.
- Description: Features dual 7" drivers and a 5.25" Turbine Cone woofer, offering exceptional imaging and detail for medium-to-large rooms. Surpasses the Reserve R700 with its Pinnacle Ring Radiator tweeter and enhanced Power Port, providing ultra-clear highs and better bass.
Legend L800
- Positioning: The true flagship large floor-standing tower speaker in the Legend series.
- Description: Uses SDA-PRO technology for lifelike stereo imaging, making it the most revealing speaker Polk has ever made. Offers a more immersive experience than the L600, with dual 10" drivers and advanced stereo separation.
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Product Strengths
- Sensitivity measures at about 94dB, which is nice
- Output levels are quite good with low distortion and compression when crossed with a subwoofer
Product Considerations
- Linearity of the speaker takes a hit, in part, to the HF boost
- Directivity in the horizontal region is poor with a narrowing response through the midrange
- Listeners sitting to the side of the speaker more than about ±15° are going to suffer from some speech intelligibility issues
- Elevated treble response rises to as much as +4dB above the average sensitivity levels above 8kHz
Comparisons (according to reviewers)
- Vs Reference Premiere (RP) series, the 'II' version of the RP series generally has a more toned down treble
Takeaway: The Klipsch RP-404C II center channel speaker has nice sensitivity and good output levels with low distortion when used with a subwoofer. Consider this speaker if you are sitting directly in front of it and want clear output levels.
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