Wharfedale Diamond 12.3 Floorstanding Speaker Review
By 8mm Audio Experts | Hi-Fi Speaker Review
The Wharfedale Diamond 12.3 Floorstanding Speaker Pair represents the latest generation of Wharfedale’s long-running Diamond series. Designed by renowned acoustic engineer Karl-Heinz Fink, the Diamond 12 range was completely redesigned to deliver improved driver performance, cabinet construction, and crossover design.
The Diamond 12.3 is a slim floorstanding speaker that combines strong bass performance with balanced midrange and smooth treble, making it suitable for both music listening and home theatre systems.
Wharfedale Diamond 12.3 Specifications
- Type: 2.5-way floorstanding speaker
- Drivers: 2 × 130mm Klarity cone drivers
- Tweeter: 25mm woven polyester dome
- Frequency response: 45Hz – 20kHz
- Sensitivity: 89dB
- Nominal impedance: 8 ohms
- Recommended amplifier power: 30 – 150W
- Peak SPL: 102dB
- Bi-wiring / bi-amping support
- Available finishes: Black, Walnut, White, Light Oak
Klarity Cone Technology
The Diamond 12.3 uses Wharfedale’s Klarity cone drivers, a composite material made from polypropylene infused with mica.
This combination increases rigidity while maintaining lightweight characteristics, helping the driver reproduce sound with reduced distortion and improved clarity.
The cone structure also includes radial ribs designed to control vibrations and maintain a consistent frequency response.
2.5-Way Driver Design
The Diamond 12.3 uses a 2.5-way speaker configuration.
In this design:
- The upper driver handles midrange and bass frequencies.
- The lower driver supports bass reproduction only.
- The tweeter handles high frequencies.
This arrangement improves bass performance while maintaining clear midrange reproduction without requiring a larger cabinet.
Crossover Design
The Diamond 12.3 features a Linkwitz-Riley crossover with a 24dB slope. This type of crossover reduces overlap between drivers and improves phase alignment.
The crossover network uses air-core inductors, which help reduce distortion compared to conventional core-based inductors often found in budget speakers.
Cabinet Construction
The speaker cabinet uses multi-layer MDF construction with internal bracing to reduce vibrations and cabinet resonance.
The rear-ported design helps extend bass performance, although the speakers should ideally be placed at least 20–30cm away from the rear wall for optimal performance.
Sound Quality
Midrange
The Diamond 12.3 delivers detailed midrange reproduction, making vocals and instruments sound natural and well balanced.
Bass
Dual drivers and the 2.5-way design allow the speaker to produce strong and controlled bass response down to around 40Hz.
Treble
The soft dome tweeter produces smooth and extended high frequencies without harshness.
Soundstage
The speakers create a wide stereo image with good instrument separation when properly positioned.
Amplifier Pairing
The Diamond 12.3 works well with integrated amplifiers in the 30–150W range.
Popular amplifier pairings include:
- Marantz PM6007
- Denon PMA-600NE
- Cambridge Audio AXA series
The 89dB sensitivity makes the speakers easy to drive with most hi-fi amplifiers and AV receivers.
Room Size Recommendations
The Diamond 12.3 performs best in rooms between 12 and 25 square metres.
In smaller rooms, careful placement away from walls helps control bass output. In medium-sized living rooms, the speakers can deliver full-range sound without requiring a subwoofer.
Pros and Cons
Pros
- Balanced sound signature with strong midrange clarity
- Good bass performance for a slim floorstanding design
- High-quality crossover components
- Multiple finish options
- Suitable for both music and home theatre systems
Cons
- Rear port requires space from the wall
- Deep sub-bass may require a separate subwoofer for home theatre
Final Verdict
The Wharfedale Diamond 12.3 offers excellent value for listeners looking for a compact floorstanding speaker with balanced sound performance.
Its modern driver technology, thoughtful cabinet design, and flexible amplifier compatibility make it a strong option for entry-level and mid-range hi-fi systems.
