The Wharfedale DIAMOND 12 Series has long been recognised as the benchmark for performance and value in affordable hi-fi. With more than five years of continuous industry praise, awards, and exceptional sales, it has become one of the most successful loudspeaker lines in its class. The new DIAMOND 12i Series refines this formula further, introducing premium new finishes and carefully engineered acoustic upgrades.

Modern Finishes, Premium Feel

The 12i Series elevates the visual appeal of the original DIAMOND range with richer, more luxurious finishes that match their refined acoustic performance. These enhancements ensure the DIAMOND 12 3Di looks as premium as it sounds.

Enhanced Internal Tuning

Wharfedale’s engineering team applied advanced testing and analysis—including laser interferometry, anechoic measurement, and computational fluid dynamics—to refine port behaviour and internal damping across the series. Though the 3Di uses a closed-box design, these broader improvements influence overall system integration and tonal balance, resulting in cleaner mids, smoother transitions, and better real-world performance.

Klarity™ Cone Technology

The DIAMOND 12 3Di uses a 100mm Klarity™ mid/bass cone made from a polypropylene and mica blend. The result is a lightweight yet rigid diaphragm with low distortion and excellent dynamic expression—ideal for surround and height-channel duties.

Advanced Motor System

A precisely engineered magnet assembly with an aluminium compensation ring reduces inductance variation and distortion. Combined with an epoxy/glass fibre bobbin, the design improves power handling, stability, and fidelity in demanding home cinema setups.

25mm Textile Dome Tweeter

A woven polyester dome with high-loss damping produces clean, extended treble. Its minimal-waveguide faceplate ensures excellent dispersion, allowing the 3Di to deliver consistent clarity whether used as an Atmos height module or rear surround.

Sophisticated Crossover Design

Using Linkwitz-Riley topology and high-grade inductors, the crossover ensures smooth driver integration with minimal phase shift. This contributes to precise spatial cues—critical for immersive surround and object-based audio.

Low-Resonance Cabinet

A multi-layered composite cabinet with computer-modelled internal bracing reduces unwanted vibration. This leads to a cleaner, more controlled sonic presentation, especially important for effects channels where clarity and localisation matter.

Purpose-Built for Immersion

The DIAMOND 12 3Di is designed specifically for surround and height-channel applications. Whether placed high on the front wall for Atmos, used as direct-radiating surrounds, or integrated into a multi-channel Diamond 12i system, it blends seamlessly and enhances immersion.

Technical Specifications – Wharfedale DIAMOND 12 3Di

Specification	Details
Model	DIAMOND 12 3Di Surround
General Description	2-way Atmos / surround loudspeaker
Enclosure Type	Closed-box system
Transducer Complement	2-way
Bass Driver	4" (100mm) advanced PP Cone
Treble Driver	1" (25mm) Textile Dome
Sensitivity (2.83V @ 1m)	82 dB
Recommended Amplifier Power	20 – 100 W
Peak SPL	95 dB
Nominal Impedance	8Ω Compatible
Minimum Impedance	4.3Ω
Frequency Response (+/-3dB)	110 Hz – 20 kHz
Bass Extension (-6dB)	90 Hz
Crossover Frequency	3 kHz
Cabinet Volume	2.7 L
Dimensions (H × W × D)	145 × 180 × 310 mm
Net Weight	3.2 kg each

Atmos & Surround Speakers