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Wharfedale Diamond 12.C Review
Wharfedale Diamond 12.C

Main Features

  • 1" soft-dome Tweeter
  • 2 x 5" Klarity woofers (polypropylene and mica) Woofer
  • 90-20k Hz Frequency Response
  • 90 dB Sensitivity
  • Impedance: 8ohms
  • Power Range: 20-102watts
  • Weight:18.70 lbs / 8.50 kg
  • Dimensions(HxWxD): 7-1/8"x18-15/16"x8-11/16" / 181.0 x 482.0 x 221.0mm
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Wharfedale Diamond 12.C Review

Wharfedale Diamond 12.C is a 2-way Passive Acoustic Suspension Center Channel speaker by Wharfedale. 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" soft-dome Tweeter and 2 x 5" Klarity woofers (polypropylene and mica) Woofer. The speaker has a frequency range of 90-20k Hz and a sensitivity of 90 dB. Wharfedale Diamond 12.C has an MSRP of 349$.

What size of room is the Wharfedale Diamond 12.C speaker good for?

The size of the room in which you are planning to use the Wharfedale Diamond 12.C is an important decision factor. Here we have evaluated its suitability to various sizes of environments considering its size and max power parameters:

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.)

What are the speakers in Wharfedale's Diamond 12 Series?

Diamond 12.C is a member of Wharfedale's Diamond 12 series of Passive speakers. Below you can see the main specs of these speakers.

Wharfedale Diamond 12 Series Speakers
Model Frequency SensitivityImpedance Woofer
Wharfedale Diamond 12.3
Compare
45-20k Hz 88 dB8Ω 2 x 5"
Wharfedale 12.2
Compare
50-20k Hz 88 dB8Ω 1 x 6.5"
Wharfedale 12.0
Compare
70-20k Hz 87 dB8Ω 1 x 4"
Wharfedale Diamond 12.4
Compare
40-20k Hz 89 dB8Ω 2 x 6.5"
Wharfedale Diamond 12.C
90-20k Hz 90 dB8Ω 2 x 5"
Wharfedale 12.1
Compare
65-20k Hz 88 dB8Ω 1 x 5"
Wharfedale Diamond 12 Series Speakers
Wharfedale Diamond 12 Series Speakers


**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.

What is the Frequency Response of the Wharfedale Diamond 12.C speaker?

Wharfedale Diamond 12.C has a Frequency response range of 90-20k Hz at ±3dB ((-6dB) 80Hz) and Power Range of 20-102 watts. Here we have a comparison of how Diamond 12.C'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
Wharfedale Diamond 12.C
Min
Average
Max
High Frequency
Center Channel Speakers
Wharfedale Diamond 12.C
Min
Average
Max


What is the Crossover frequency of Wharfedale Diamond 12.C?

The Crossover frequency of the Diamond 12.C is set to 2000Hz. 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.

What are the Impedance and Sensitivity of the Wharfedale Diamond 12.C? Is it an easy-to-drive speaker?

Wharfedale Diamond 12.C's nominal impedance level is 8 ohms but can go down to as low as 3.7 ohms, and has a sensitivity of 90 dB.

Sensitivity
Center Channel Speakers
Wharfedale Diamond 12.C
Min
Average
Max

8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Wharfedale Diamond 12.C is not considered a difficult to drive speaker from nominal Impedance perspective.

Sensitivity

90dB of Wharfedale Diamond 12.C is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise.

Minimum Impedance of Wharfedale Diamond 12.C

Even though the nominal impedance of the Diamond 12.C is 8 ohms, the minimum impedance level of this speaker according to Wharfedale is 3.7 ohms Wharfedale Diamond 12.C so while choosing an amplifier, you should ideally check if the unit you are considering can provide this impedance level.

Check the amplifiers that are in a similar price range to the Wharfedale Diamond 12.C:

  • Integrated Amps under 300 USD
  • Integrated Amps under 500 USD
  • Integrated Amps under 750 USD
  • All Integrated Amplifiers

Input Type

Diamond 12.C has Binding post type connectors and lets bi-amping/bi-wiring. Bi-wiring can provide improvements in the overall transparency of your loudspeakers by running separate speaker wires to the low & high frequency drivers from a single amplifier. Bi-amping allows the use of separate amplifiers for the high & low frequency drivers of your loudspeaker which may result in greater dynamic range & lower distortion.

Wharfedale Diamond 12.C Back View
Wharfedale Diamond 12.C Back View

Wharfedale Diamond 12.C External Dimensions and Weight

Wharfedale Diamond 12.C has external dimensions of (Height x Width x Depth) 7-1/8 x 18-15/16 x 8-11/16inch (181.0 x 482.0 x 221.0mm ).

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 Wharfedale Diamond 12.C is approximately 1065.2cm2 / 165.1inch2.

To get a better perspective on the real life size of Wharfedale Diamond 12.C, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

Wharfedale Diamond 12.C Real Life Body Size Comparison
Wharfedale Diamond 12.C Speaker Size Compared to a Compact Disc

Weight

The Wharfedale Diamond 12.C weighs 8.50kg / 18.7lbs per piece. Here is a comparison of how Diamond 12.C's weight compares with the average, max and min weights in its class.

Weight
All Center Channel Speakers
Wharfedale Diamond 12.C
Min
Average
Max
Weight
Center Channel Speakers under $500
Wharfedale Diamond 12.C
Min
Average
Max

Cabinet type and Materials

Wharfedale Diamond 12.C has a Acoustic Suspension type cabinet. 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.

Speaker Feet

Wharfedale Diamond 12.C comes with 4 Self-adhesive rubber feet 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

Wharfedale Diamond 12.C is available in White, Walnut and Black.

Does the Wharfedale Diamond 12.C come with a Grille?

Diamond 12.C comes with grilles. 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.

Wharfedale Diamond 12.C  with Grille
Wharfedale Diamond 12.C with Grille

What's in the Box of Wharfedale Diamond 12.C?

Here are the items that are included inside the box of Diamond 12.C:
  • Center-channel loudspeaker
  • Grille
  • 2 Jumper-bars
  • (pre-installed)
  • 4 Self-adhesive rubber feet
  • User-feets Manual
  • User's Manual

    For more information about how to setup, use and maintain the Wharfedale Diamond 12.C, use the direct link below to download the official manual document:
    Download User Manual for Wharfedale Diamond 12.C

    Official Brochure

    Here is a link to download the official brochure for the Wharfedale Diamond 12.C speaker:
    Official Brochure for Wharfedale Diamond 12.C

    Official Product Page

    Official manufacturer's product page for the Wharfedale Diamond 12.C speaker can be found below:
    Official Product Page for Wharfedale Diamond 12.C

    Warranty

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

    Wharfedale Diamond 12.C Alternatives in Passive Center Channel Speakers
    Model Type Sensitivity Impedance Frequency
    Polk ES35
    Compare
    2-way 89 dB 8 ohms 66-40k Hz
    Sony SS-CS8
    Compare
    2-way 86 dB 6 ohms 55-25k Hz
    Polk XT35
    Compare
    2-way 87 dB 8 ohms 57-40k Hz
    Polk ES30
    Compare
    2-way 89 dB 8 ohms 55-40k Hz
    Klipsch RP-404C II
    Compare
    2-way 94 dB 8 ohms 87-25k Hz
    Emotiva Airmotiv C1+
    Compare
    3-way 89 dB 4 ohms 50 Hz – 28 kHz
    Emotiva Airmotiv C2+
    Compare
    3-way 92 dB 4 ohms 45 Hz – 28 kHz
    Polk R400
    Compare
    2-way 89 dB 8 ohms 48-39K Hz
    Klipsch RP-500C II
    Compare
    2-way 96 dB 8 ohms 60-25k Hz
    Klipsch RP-600C
    Compare
    2-way 97 dB 8 ohms 58-25k Hz
    Frequently Asked Questions about Wharfedale Diamond 12.C
    What is the External Dimensions of Wharfedale Diamond 12.C
    What is the Speaker Sensitivity of Wharfedale Diamond 12.C
    is the Wharfedale Diamond 12.C an easy to drive speaker?



    Wharfedale Diamond 12.C Detailed Specifications

    General
    BrandWharfedale
    Full Model NameWharfedale Diamond 12.C
    Speaker Type2-way Center Channel
    Power Range20-102 watts
    Sensitivity90 dB
    Impedance8 ohms
    Frequency Response90-20k Hz
    DRIVERS
    Woofer Size5-inch
    Woofer CompositionKlarity woofers (polypropylene and mica)
    Tweeter Size1-inch
    Tweeter Typesoft-dome
    Crossover freq2000Hz

    CONNECTIONS
    Connector TypeBinding post
    Biamp InputsYes
    PHYSICAL SPECS
    Height181.0mm ( 7-1/8-inch)
    Width482.0mm ( 18-15/16-inch)
    Depth221.0mm ( 8-11/16-inch)
    Height181.0mm ( 7-1/8-inch)
    Weight8.50kg ( 18.70 lbs)
    EnclosureAcoustic Suspension
    Available ColorsWhite, Walnut, Black
    Mounting BracketNo
    GrilleYes
    Moisture ResistanceNo
    OTHER
    Handheld RemoteNo
    Parts Warranty5 Years
    Labor Warranty5 Years
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