Wharfedale Diamond 155 speaker
Diamond 155
Naturally cabinet design was not forgotten in amongst all the other technology. Rectilinear cabinet shapes were chosen to maximize the internal volume and provide the deepest, most extended bass response. Again the research from the highend Jade series was incorporated to elicit the latest advance in loudspeaker reflex loading – the Slot-Loaded Distributed Port.
Exiting at the base of the speaker cabinet, the refl ex port is loaded by a slot created by the plinth. This equalises the air pressure to mimic that inside the cabinet allowing smooth transition between the pressure variation in the cabinet and the low frequency sound developed in the room.
Cabinet walls and internal bracing were also incorporated in the ‘Virtual Speaker’ model, with the help of Delayed Cumulative Spectral Analysis that ruthlessly reveals panel coloration in all its forms. Using this technique Wharfedale engineers formulated a cabinet panel construction of multigrain faceted boards bonded together to damp annoying High-Q resonances and block internal sound leakage. The effect is that the ‘noise’ from cabinet walls is buried more than 35dB below the driver output. In Diamond 100 all you hear is crystal clear music from the drive units without any attendant coloration from the cabinet. Again computer analysis helped refine this novel technique, but the result is an audibly superior bass performance of great articulation and clarity.
Specification
| General Description | 2.5-way Floorstanding Speaker |
| Enclosure Type | Bass Reflex |
| Transducer Complement | 2.5-way |
| Bass Driver | 165mm Woven Kevlar Cone |
| Midrange Driver | 165mm Woven Kevlar Cone |
| Treble Driver | 25mm Soft Dome |
| AV Shield | No |
| Sensitivity (2.83V @ 1m) | 89dB |
| Recommended Amplifier Power | 25-150W |
| Peak SPL | 102dB |
| Nominal Impedance | 8 Ohms Compatible |
| Minimum Impedance | 3.7 Ohms |
| Frequency Response (+/-3dB) | 40Hz - 20kHz |
| Bass Extension (-6dB) | 37Hz |
| Crossover Frequency | 2.2kHz |
| Cabinet Volume (in litres) | 35L |
| Dimensions (H x W x D) | 963 x 196 x 334 (mm) |
| Net Weight | 19.3kg/pcs |
The Real Test
That doesn’t mean that Diamond 100 is purely a computer design, clever though that might be. This ‘Virtual Speaker’ is simply a tool that allows the Wharfedale engineers to explore all facets of the loudspeaker ’s performance before starting listening tests. In the final evaluation weeks are spent fine tuning the acoustic performance using a wide variety of music in Wharfedale’s five listening rooms, each of which mimics the kind of domestic environments the Diamond Series are likely to be used in. Only when the acoustic tests are deemed truly satisfying are the loudspeaker designs signed-off for production, ensuring that each speaker model fulfils its eventual owner’s dreams of musically enjoyable reproduction from Britain’s Most Famous Loudspeakers.
That doesn’t mean that Diamond 100 is purely a computer design, clever though that might be. This ‘Virtual Speaker’ is simply a tool that allows the Wharfedale engineers to explore all facets of the loudspeaker ’s performance before starting listening tests. In the final evaluation weeks are spent fine tuning the acoustic performance using a wide variety of music in Wharfedale’s five listening rooms, each of which mimics the kind of domestic environments the Diamond Series are likely to be used in. Only when the acoustic tests are deemed truly satisfying are the loudspeaker designs signed-off for production, ensuring that each speaker model fulfils its eventual owner’s dreams of musically enjoyable reproduction from Britain’s Most Famous Loudspeakers.
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