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Klipsch RP-404C II Review
Klipsch Reference Premiere RP-404C II

Main Features

  • 1" Tractrix Horn Tweeter
  • 4 x 4" Cerametallic cone Woofer
  • 87-25k Hz Frequency Response
  • 94 dB Sensitivity
  • Impedance: 8ohms
  • Power Range: up to 125watts
  • Weight:20.30 lbs / 9.20 kg
  • Dimensions(HxWxD): 5-3/4"x26-7/8"x6-1/2" / 147.0 x 683.0 x 166.0mm
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Klipsch RP-404C II Review
Klipsch RP-404C II Klipsch RP-404C II
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Klipsch Reference Premiere RP-404C II is a 2-way Passive Acoustic Suspension Center Channel speaker by Klipsch. Center channel speaker is an important component of a home theater system set-up as it delivers the listener significant part of the on-screen dialogue from your television. It features a 1" Tractrix Horn Tweeter and 4 x 4" Cerametallic cone Woofer. The speaker has a frequency range of 87-25k Hz and a sensitivity of 94 dB. Klipsch RP-404C II has an MSRP of 599$.

Room Size Suitability

The size of the room where you plan to use the Klipsch RP-404C II 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.)

Klipsch replaced the older RP-404C with this model. Follow the link to read our detailed comparison of these models:
Compare Klipsch RP-404C II vs Klipsch RP-404C
Klipsch RP-404C II  Lifestyle
Klipsch RP-404C II Lifestyle

Klipsch's Reference Premiere (RP) II Series of Loudspeakers

RP-404C II is a member of Klipsch's Reference Premiere (RP) II series of Passive speakers. Below you can see the main specs of these speakers.

Klipsch Reference Premiere (RP) II Series Speakers
Model Frequency SensitivityImpedance Woofer
Klipsch RP-8000F II
Compare
32-25k Hz 98 dB8Ω 2 x 8"
Klipsch RP-600M II
Compare
44-25k Hz 94.5 dB8Ω 1 x 6.5"
Klipsch RP-504C II
Compare
50-25k Hz 96 dB8Ω 4 x 5.25"
Klipsch RP-500M II
Compare
50-25k Hz 92 dB8Ω 1 x 5.25"
Klipsch RP-8060FA II
Compare
35-25k Hz 98 dB8Ω 2 x 8"
Klipsch RP-6000F II
Compare
38-25k Hz 96 dB8Ω 2 x 6.5"
Klipsch RP-404C II
87-25k Hz 94 dB8Ω 4 x 4"
Klipsch RP-5000F II
Compare
35-25k Hz 95 dB8Ω 2 x 5.25"
Klipsch RP-500C II
Compare
60-25k Hz 96 dB8Ω 2 x 5.25"


**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 Klipsch RP-404C II Speaker

Klipsch RP-404C II has a Frequency response range of 87-25k Hz at ±3dB and Power Range of up to 125 watts. Here we have a comparison of how RP-404C II's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.

Low Frequency
Center Channel Speakers
Klipsch RP-404C II
Min
Average
Max
High Frequency
Center Channel Speakers
Klipsch RP-404C II
Min
Average
Max

Klipsch RP-404C II Tweeter
Klipsch RP-404C II's titanium Tractrix Horn Tweeter

Crossover frequency of the Klipsch RP-404C II?

The Crossover frequency of the RP-404C II is set to 1900 Hz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.

Impedance and Sensitivity

Klipsch RP-404C II's nominal impedance level is 8 ohms and has a sensitivity of 94 dB.

Sensitivity
Center Channel Speakers
Klipsch RP-404C II
Min
Average
Max

8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Klipsch Reference Premiere RP-404C II is not considered a difficult to drive speaker from nominal Impedance perspective.

Sensitivity

94dB of the Klipsch Reference Premiere RP-404C II is considered a high sensitivity compared to average stereo speaker which makes RP-404C II 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 Klipsch RP-404C II will be a good choice.

Check the amplifiers that are in a similar price range to the Klipsch RP-404C II:

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

Input Type

RP-404C II features Binding post type connectors. Bi-amping and Bi-wiring are not possible.
Klipsch RP-404C II Back View
Klipsch RP-404C II Back View

Klipsch RP-404C II External Dimensions and Weight

Klipsch RP-404C II has external dimensions of (Height x Width x Depth) 5-3/4 x 26-7/8 x 6-1/2inch (147.0 x 683.0 x 166.0mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of Klipsch RP-404C II is approximately 1133.8cm2 / 175.7inch2.

To get a better perspective on the real life size of Klipsch RP-404C II, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

Klipsch RP-404C II Real Life Body Size Comparison
Klipsch RP-404C II Speaker Size Compared to a Compact Disc

Weight

The Klipsch RP-404C II weighs 9.20kg / 20.2lbs per piece. Here is a comparison of how RP-404C II's weight compares with the average, max and min weights in its class.

Weight
All Center Channel Speakers
Klipsch RP-404C II
Min
Average
Max
Weight
Center Channel Speakers under $750
Klipsch RP-404C II
Min
Average
Max

How does the Klipsch RP-404C II compare to the Klipsch Reference Premiere RP-504C II?

One of the natural alternative to the Klipsch RP-404C II is the RP-504C II which is located one step higher in Klipsch's Passive Center Channel selection.

Here is a scaled size comparison of these two speakers to give you an idea how their external dimensions compare:

Klipsch RP-404C II vs Klipsch RP-504C II Size Comparison - Front View
Comparison image of Klipsch RP-404C II and Klipsch RP-504C II Size and External Dimensions

Check the Detailed Comparison of Klipsch RP-404C II vs RP-504C II for more details.

Cabinet type and Materials

Klipsch RP-404C II has a Acoustic Suspension type cabinet and a MDF/Wood-grain vinyl finish. Acoustic Suspension loudspeakers aka Sealed speakers have no openings such as ports or slots.. They can be designed smaller, the bass is more accurate and tighter compared to ported designs but doesn't go as low on the lower end in general.

Klipsch RP-404C II  - Side View
Klipsch RP-404C II - Side View

Speaker Feet

Klipsch RP-404C II comes with Cork pads which you can use to secure your loudspeaker on the surface that you are putting on.

It is always recommended to use some kind of feet under all types of speakers. Besides limiting the movement of the speakers, it also compensates for non-flat surfaces and limits the contact surface area of the speaker. Rubber based feet also help isolating the vibrations within certain frequency ranges.

Available colors

Klipsch RP-404C II is available in Walnut and Black.

Does the Klipsch RP-404C II come with a Grille?

RP-404C II comes with magnetic grilles in black color choices. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible. Since the included grille of the RP-404C II is magnetic type, it is very easy to put it on and off.

Klipsch RP-404C II  with Grille
Klipsch RP-404C II with Grille

What's in the Box of Klipsch RP-404C II?

Here are the items that are included inside the box of RP-404C II:
  • Center channel loudspeaker
  • Grille
  • User Manual
  • Important Safety Instructions
  • Warranty Information
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the Klipsch Reference Premiere RP-404C II.

    • 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.

    User's Manual

    For more information about how to setup, use and maintain the Klipsch Reference Premiere RP-404C II, use the direct link below to download the official manual document:
    Download User Manual for Klipsch RP-404C II

    Official Product Page

    Official manufacturer's product page for the Klipsch Reference Premiere RP-404C II speaker can be found below:
    Official Product Page for Klipsch RP-404C II

    Warranty

    5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.

    Klipsch Reference Premiere RP-404C II Alternatives in Passive Center Channel Speakers
    Model Type Sensitivity Impedance Frequency
    Klipsch RP-504C II
    Compare
    2-way 96 dB 8 ohms 50-25k Hz
    Klipsch RP-404C
    Compare
    2-way 97 dB 8 ohms 59-25k Hz
    Klipsch R-30C
    Compare
    2-way 96 dB 8 ohms 78-21k Hz
    Klipsch RP-500C II
    Compare
    2-way 96 dB 8 ohms 60-25k Hz
    Polk ES35
    Compare
    2-way 89 dB 8 ohms 66-40k Hz
    Klipsch R-34C
    Compare
    2-way 96 dB 8 ohms 82-21k Hz
    Klipsch R-52C
    Compare
    2-way 95 dB 8 ohms 89-21k Hz
    Klipsch R-50C
    Compare
    2-way 96 dB 8 ohms 90-21k Hz
    Frequently Asked Questions about Klipsch Reference Premiere RP-404C II
    What is the External Dimensions of Klipsch Reference Premiere RP-404C II
    What is the Speaker Sensitivity of Klipsch Reference Premiere RP-404C II
    is the Klipsch Reference Premiere RP-404C II an easy to drive speaker?

    Klipsch RP-404C II Detailed Specifications

    General
    BrandKlipsch
    Full Model NameKlipsch Reference Premiere RP-404C II
    Speaker Type2-way Center Channel
    Power Rangeup to 125 watts
    Sensitivity94 dB
    Impedance8 ohms
    Frequency Response87-25k Hz
    DRIVERS
    Woofer Size4-inch
    Woofer CompositionCerametallic cone
    Woofer SurroundRubber
    Tweeter Size1-inch
    Tweeter TypeTractrix Horn
    Crossover freq1900 Hz

    CONNECTIONS
    Connector TypeBinding post
    Biamp InputsNo
    PHYSICAL SPECS
    Height147.0mm ( 5-3/4-inch)
    Width683.0mm ( 26-7/8-inch)
    Depth166.0mm ( 6-1/2-inch)
    Height147.0mm ( 5-3/4-inch)
    Weight9.20kg ( 20.30 lbs)
    EnclosureAcoustic Suspension
    FinishMDF/Wood-grain vinyl
    Available ColorsWalnut, Black
    GrilleYes
    Moisture ResistanceNo
    OTHER
    Handheld RemoteNo
    Parts Warranty5 Years
    Labor Warranty5 Years
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