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Polk Audio 255c-LS Review
Polk Audio 255c-LS

Main Features

  • 1.0" Ring radiator Tweeter
  • 2 x 5.25" Aerated polypropylene Woofer
  • 44-29kHz Frequency Response
  • 91 dB Sensitivity
  • Impedance: 8ohms
  • Power Range: 10-150watts
  • Weight:6.86 lbs / 3.12 kg
  • Dimensions(HxWxD): 7.6250"x13.1250"x0.0000" /
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Polk Audio 255c-LS Review
Polk Audio 255c-LS Polk Audio 255c-LS
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Polk Audio 255c-LS is a 2-way Passive In-wall In-wall speaker by Polk Audio. It features a 1.0" Ring radiator Tweeter and 2 x 5.25" Aerated polypropylene Woofer. The speaker has a frequency range of 44-29kHz and a sensitivity of 91 dB. Polk Audio 255c-LS has an MSRP of 598$ per pair.

Room Size Suitability

The size of the room where you plan to use the Polk Audio 255c-LS is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:

Listening Environment* Suitability
Near-fieldPoor
Small RoomAverage
Mid-size RoomGood
Large RoomAverage
Very Large RoomPoor

(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2. Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Frequency Response of the Polk Audio 255c-LS Speaker

Polk Audio 255c-LS has a Frequency response range of 44-29kHz at ±3dB and Power Range of 10-150 watts. With a minimum frequency of 44 Hz, 255c-LS delivers deep bass that will likely satisfy most listeners, especially those who enjoy music. However, movie enthusiasts and music fans who prefer a full range of sound may still benefit from adding a subwoofer.

To focus on the subwoofers that are in a similar price range with Polk Audio 255c-LS, check out the Powered Subwoofers under $750. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how 255c-LS's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
In-wall Speakers
Polk Audio 255c-LS
Min
Average
Max
High Frequency
In-wall Speakers
Polk Audio 255c-LS
Min
Average
Max

Impedance and Sensitivity

Polk Audio 255c-LS's nominal impedance level is 8 ohms and has a sensitivity of 91 dB.

Sensitivity
In-wall Speakers
Polk Audio 255c-LS
Min
Average
Max

8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Polk Audio 255c-LS is not considered a difficult to drive speaker from nominal Impedance perspective.

Sensitivity

91dB of the Polk Audio 255c-LS is considered a high sensitivity compared to average stereo speaker which makes 255c-LS an easy to drive from Sensitivity perspective. If you are planning to power your speaker with a Tube amp which are generally very low power, the Polk Audio 255c-LS will be a good choice.

Check the amplifiers that are in a similar price range to the Polk Audio 255c-LS:

  • Integrated Amps under 500 USD
  • Integrated Amps under 750 USD
  • Integrated Amps under 1000 USD
  • All Integrated Amplifiers

Input Type

255c-LS features Spring post type connectors. Bi-amping and Bi-wiring are not possible.

Polk Audio 255c-LS External Dimensions and Weight

Polk Audio 255c-LS has external dimensions of (Height x Width x Depth) 7.6250-inch x 13.1250-inch x 0.0000-inch.

Cabinet type and Materials

Polk Audio 255c-LS has a In-wall type cabinet.

What's in the Box of Polk Audio 255c-LS?

Here are the items that are included inside the box of 255c-LS:
  • In-wall loudspeaker
  • White metal grille
  • Mounting template
  • Owners Manual
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the Polk Audio 255c-LS.

    • Speaker Cable and Connectors
      • Speaker Cables with Banana Plugs: If you know the lenght of the cable you need, this is the easier option to connect your speakers with your amp.
      • Speaker Cables without Connectors: If you are not sure about the lenght or need longer than standard cables with plugs, choose this option.
      • Banana Connectors and Plugs: If you chose the cables without connectors option or already have some cable around, pick the banana plugs separately.
    • Vibration Isolators: IsoAcoustics isolators more affordable options too.
    • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.

    Warranty

    Lifetime of parts warranty and Lifetime of labor warranty is generally provided by the manufacturer.

    Polk Audio 255c-LS Alternatives in Passive In-wall Speakers
    Model Type Sensitivity Impedance Frequency
    Polk Audio 265 RT
    Compare
    2-way 91 dB 8 ohms 45-25kHz
    Polk Audio 255C-RT
    Compare
    2-way 90 dB 8 ohms 50-25kHz
    Polk Audio 65 RT
    Compare
    2-way 90 dB 8 ohms 50-25kHz
    Klipsch R-5502-W II
    Compare
    2-way 92 dB 8 ohms 46-20kHz
    Klipsch R-5800-W II
    Compare
    2-way 94 dB 8 ohms 40-23kHz
    Polk Audio 265-LS
    Compare
    3-way 91 dB 8 ohms 28-33kHz
    Monitor Audio W250-LCR
    Compare
    2-way 88 dB 8 ohms 60-30kHz
    Definitive DI 5.5LCR
    Compare
    2-way 89 dB 8 ohms 28-30kHz
    Frequently Asked Questions about Polk Audio 255c-LS
    What is the Speaker Sensitivity of Polk Audio 255c-LS
    is the Polk Audio 255c-LS an easy to drive speaker?

    Polk Audio 255c-LS Detailed Specifications

    General
    BrandPolk Audio
    Full Model NamePolk Audio 255c-LS
    Speaker Type2-way In-wall
    Power Range10-150 watts
    Sensitivity91 dB
    Impedance8 ohms
    Frequency Response44-29kHz
    DRIVERS
    Woofer Size5.25-inch
    Woofer CompositionAerated polypropylene
    Woofer SurroundRubber
    Tweeter Size1.0-inch
    Tweeter TypeRing radiator
    Aimable TweeterNo
    Midrange SizeN/A-inch

    CONNECTIONS
    Connector TypeSpring post
    Biamp InputsNo
    PHYSICAL SPECS
    Height194.0mm ( 7.6250-inch)
    Width334.0mm ( 13.1250-inch)
    Depthmm ( 0.0000-inch)
    Height194.0mm ( 7.6250-inch)
    Weight3.12kg ( 6.86 lbs)
    EnclosureIn-wall
    Moisture ResistanceNo
    OTHER
    Handheld RemoteNo
    Parts WarrantyLifetime
    Labor WarrantyLifetime
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